WO2010004754A1 - 試験装置、試験方法、及び位相シフタ - Google Patents
試験装置、試験方法、及び位相シフタ Download PDFInfo
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- WO2010004754A1 WO2010004754A1 PCT/JP2009/003209 JP2009003209W WO2010004754A1 WO 2010004754 A1 WO2010004754 A1 WO 2010004754A1 JP 2009003209 W JP2009003209 W JP 2009003209W WO 2010004754 A1 WO2010004754 A1 WO 2010004754A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3181—Functional testing
- G01R31/319—Tester hardware, i.e. output processing circuits
- G01R31/31903—Tester hardware, i.e. output processing circuits tester configuration
- G01R31/31908—Tester set-up, e.g. configuring the tester to the device under test [DUT], down loading test patterns
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3181—Functional testing
- G01R31/319—Tester hardware, i.e. output processing circuits
- G01R31/31917—Stimuli generation or application of test patterns to the device under test [DUT]
- G01R31/31922—Timing generation or clock distribution
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
- G11C29/56008—Error analysis, representation of errors
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/56—External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor
- G11C29/56012—Timing aspects, clock generation, synchronisation
Definitions
- the present invention relates to a test apparatus, a test method, and a phase shifter.
- the present invention particularly relates to a test apparatus, a test method, and a phase shifter for suppressing DNL.
- This application is related to the following Japanese application. For designated countries where incorporation by reference of documents is permitted, the contents described in the following application are incorporated into this application by reference and made a part of this application.
- Patent Document 1 synchronizes a reproduction clock and output data in a test apparatus for the purpose of causing a strobe signal based on the reproduction clock to follow timing variations of output data of a device under test.
- the loop latency should be kept to several ns, but the band of the active low-pass filter of the PLL is limited to several MHz, resulting in a phase delay of several tens of ns.
- the delay of the loop latency decreases the timing margin in the timing comparator, which causes a deterioration in jitter tolerance.
- the phase shift range is finite and the tracking range is limited. If the phase is to be advanced beyond the phase shift range, it is necessary to return the phase once in units of the strobe signal period. As a result, the phase becomes unstable for the time required to return to the predetermined phase, and PASS (pass) / FAIL (fail) also becomes indefinite. Therefore, the device under test cannot be accurately tested.
- a test apparatus for testing a device under test which has a reference frequency and generates a reference clock for controlling the operation of the device under test.
- the output value of the output data is obtained at a timing indicated by a reference clock source, a reproduction clock generation circuit that generates a reproduction clock that is substantially equal to the phase of the output data output from the device under test, and a strobe signal based on the reproduction clock
- the recovered clock generation circuit compares the phase of the output data output from the device under test with the phase of the recovered clock.
- a phase comparator a control signal generator for generating a control signal based on the output of the phase comparator, so that the phase of the recovered clock is synchronized with the phase of the output data, and the phase of the reference clock by the control signal
- a phase shifter that continuously shifts the phase.
- a test apparatus for testing a device under test which includes a reference clock source that generates a reference clock for controlling the operation of the device under test, and a reproduction clock that is substantially equal to the phase of output data output from the device under test.
- a reproduction clock generation circuit to generate, a data acquisition unit for acquiring an output value of the output data at a timing indicated by a strobe signal based on the reproduction clock, and a predetermined expectation for the output value acquired by the data acquisition unit
- a comparator for comparing with a value, and a determination unit for determining whether the device under test is good or bad based on a comparison result of the comparator, wherein the recovered clock generation circuit is configured to output a phase of the output data output from the device under test.
- a phase comparator for comparing the phase of the recovered clock, and the level of the reference clock based on the output of the phase comparator. Continuously with a phase shifter for phase shifting a.
- the control signal generation unit may generate a first control voltage and a second control voltage as the control signal, and the phase shifter includes a phase shifter that shifts the phase of the reference clock by a predetermined angle; A first multiplier that multiplies a reference clock and the first control voltage; a second multiplier that multiplies the output of the phase shifter and the second control voltage; the first multiplier and the second multiplier; And an adder for adding the outputs of the units.
- the control signal generator may further include a control signal generator that generates a control signal based on the output of the phase comparator so that the phase of the recovered clock is synchronized with the phase of the output data.
- the phase shifter may shift the phase of the reference clock by approximately 90 degrees.
- the phase shifter may further include a low-pass filter that removes a high frequency included in the output of the adder.
- the phase shifter may further include a frequency divider that divides the output from the adder. It may further comprise a frequency divider that divides the recovered clock from the recovered clock generation circuit, and the data acquisition unit is instructed by the strobe signal based on the recovered clock frequency-divided by the frequency divider. The output value of the output data may be acquired at the timing of performing.
- a test method for testing a device under test which is a reference clock generation step for generating a reference clock for controlling the operation of the device under test, A reproduction clock generation stage for generating a reproduction clock that is substantially equal to a phase of output data output by the device under test; and a data acquisition stage for acquiring an output value of the output data at a timing indicated by a strobe signal based on the reproduction clock; A comparison step of comparing the output value acquired in the data acquisition step with a predetermined expected value, and a determination step of determining pass / fail of the device under test based on a comparison result of the comparison step, the reproduction The clock generation stage compares the phase of the output data output from the device under test with the phase of the recovered clock.
- a phase comparison stage ; a control signal generation stage for generating a control signal based on an output of the phase comparison stage so that a phase of the recovered clock is synchronized with a phase of the output data; and a phase of the reference clock by the control signal And a phase shift stage that continuously shifts the phase.
- a test method for testing a device under test comprising: a reference clock generation step for generating a reference clock having a reference frequency and controlling the operation of the device under test; and output data output from the device under test A reproduction clock generation stage for generating a reproduction clock substantially equal to the phase; a data acquisition stage for acquiring an output value of the output data at a timing indicated by a strobe signal based on the reproduction clock; and the output acquired in the data acquisition stage A comparison step of comparing a value with a predetermined expected value, and a determination step of determining pass / fail of the device under test based on a comparison result of the comparison step, wherein the recovered clock generation step is performed by the device under test A phase comparison stage for comparing the phase of the output data output and the phase of the recovered clock; and the phase comparison stage Based on the output, and a phase shift step of continuously phase shifting the phase of the reference clock.
- a control signal generating step for generating a control signal based on an output of the phase comparison step so that a phase of the recovered clock is synchronized with a phase of the output data.
- Generating a first control voltage and a second control voltage wherein the phase shift step multiplies the phase shift step of shifting the phase of the reference clock by a predetermined angle, and the reference clock and the first control voltage.
- a multiplication stage; a second multiplication stage that multiplies the output in the phase shift stage and the second control voltage; and an addition stage that adds the outputs in the first multiplication stage and the second multiplication stage. May be included.
- the phase of the reference clock may be shifted by approximately 90 degrees.
- the phase shifting step may further include a low pass filtering step of removing high frequencies included in the output of the adding step.
- the phase shifting step may further include a frequency dividing step of dividing the output from the adding step.
- the method further comprises a frequency division step of dividing the reproduction clock from the reproduction clock generation step, and in the data acquisition step, the strobe signal based on the reproduction clock divided by the frequency division step indicates the timing You may acquire the output value of output data.
- a phase shift unit that receives an AC input signal and shifts the phase of the input signal by a predetermined angle, the input signal, and the first control A voltage is input, a first multiplier that multiplies the input signal and the first control voltage, an output signal of the phase shifter and a second control voltage are input, and the output signal of the phase shifter and the A second multiplier for multiplying a second control voltage; and an adder for receiving the output signals of the first multiplier and the second multiplier and adding the output signals.
- the phase of the input signal is continuously shifted by the voltage and the second control voltage.
- the phase shift unit may shift the phase of the input signal by approximately 90 degrees. You may further provide the low-pass filter which removes the high frequency contained in the output of the said addition part.
- FIG. 1 shows a configuration of a phase shifter 101 using an IQ modulator according to a first embodiment.
- An example of a signal waveform of a reference clock and a signal output from each component of the phase shifter 101 is shown.
- a relationship between the first control voltage and the second control voltage and the phase shift angle is shown.
- An example of the structure of the test apparatus 110 concerning 2nd Embodiment is shown. The relationship between a 1st control voltage and a 2nd control voltage, and a tracking range is shown.
- a block diagram of the test apparatus 110 when the frequency divider is provided in the phase shifter 101 is shown.
- phase shifter 102 phase shifter 103 first multiplier 104 second multiplier 105 adder 106 low-pass filter 107 reference clock source 110 test device 111 level comparator 112 reproduction clock generation circuit 113 data acquisition unit 114 comparator 115 determination unit 121 phase Comparator 122 Control signal generator 130 Divider 150 DUT 1001 Signal waveform 1002 Signal waveform 1003 Signal waveform 1004 Signal waveform 1005 Signal waveform 1006 Signal waveform
- FIG. 1 shows a configuration of a phase shifter 101 using an IQ modulator according to the first embodiment.
- the phase shifter 101 includes components of a phase shifter 102, a first multiplier 103, a second multiplier 104, an adder 105, and a low-pass filter 106.
- FIG. 1 also shows a reference clock source 107 that inputs a signal waveform to the phase shifter 101.
- the reference clock source 107 generates an AC signal.
- An AC signal generated by the reference clock source 107 is referred to as a reference clock.
- the frequency of this reference clock is set as a reference frequency.
- the reference clock source 107 outputs the generated reference clock to the phase shifter 102 and the first multiplier 103.
- FIG. 2 shows an example of a signal waveform of a signal output from each component of the reference clock and the phase shifter 101.
- a signal waveform 1001 in FIG. 2 shows the waveform of the reference clock output from the reference clock source 107. Note that the reference clock may not be a rectangular wave.
- the phase shifter 102 shifts the phase of the input reference clock by 90 °.
- the phase shifter 102 outputs the reference clock shifted by 90 ° to the second multiplier 104.
- a signal waveform 1002 in FIG. 2 shows a signal waveform of a signal output from the phase shifter 102. It can be seen that the signal waveform 1002 is delayed by 90 ° from the waveform of the reference clock, that is, the phase of the signal waveform 1001.
- the phase shifter 102 is not limited to 90 °, and may be shifted by a predetermined angle. Further, the phase may be shifted by approximately 90 °.
- the reference clock generated by the reference clock source 107 and the first control voltage are input to the first multiplier 103.
- the first multiplier 103 multiplies the input reference clock by the first control voltage. By multiplying the reference clock by the first control voltage, the amplitude of the reference clock is changed.
- the first multiplier 103 outputs the multiplied signal to the adder 105.
- a signal waveform 1003 in FIG. 2 shows a signal waveform of a signal output from the first multiplier 103. It can be seen that the signal waveform 1003 has the same phase as the signal waveform 1001 but has a different amplitude. In FIG. 2, the amplitude of the signal waveform 1003 is smaller than the amplitude of the signal waveform 1001.
- the reference clock shifted by 90 ° by the phase shifter 102 and the second control voltage are input to the second multiplier 104.
- the second multiplier 104 multiplies the input 90 ° phase-shifted reference clock by the second control voltage.
- Second multiplier 104 outputs the multiplied signal to adder 105.
- a signal waveform 1004 in FIG. 2 shows a signal waveform of a signal output from the second multiplier 104. It can be seen that the signal waveform 1004 has the same phase as the signal waveform 1002 of the signal output from the phase shifter 102, but the amplitude is different. In FIG. 2, the amplitude of the signal waveform 1004 is smaller than the amplitude of the signal waveform 1002.
- the adder 105 adds the signal output from the first multiplier 103 and the signal output from the second multiplier 104.
- the adder 105 outputs the added signal to the low pass filter 106.
- a signal waveform 1005 in FIG. 2 shows a signal waveform of a signal output from the adder 105. It can be seen that the signal waveform 1005 is a signal waveform obtained by adding the signal waveform 1003 and the signal waveform 1005.
- the low-pass filter 106 may be a passive filter that removes a high frequency of the clock frequency. Thereby, a cut-off frequency becomes several GHz or more.
- the low-pass filter removes the high frequency of the signal input from the adder 105 and outputs it.
- a signal waveform 1006 in FIG. 2 shows a signal waveform of a signal output from the low-pass filter 106. It can be seen that the signal waveform 1006 is a waveform from which the high frequency of the signal waveform 1005 of the signal output from the adder 105 is removed.
- the waveform indicated by the dotted line indicates the phase of the reference clock
- the signal waveform 1006 shows that the phase is delayed by 30 ° from the phase of the reference clock.
- the angle at which the phase of the reference clock is shifted can be changed according to the values of the first control voltage and the second control voltage input to the first multiplier 103 and the second multiplier 104.
- FIG. 3 shows the relationship between the first control voltage and the second control voltage and the angle of phase shift.
- the first control voltage (I side) is taken in the x-axis direction
- the second control voltage (Q side) is taken in the y-axis direction.
- the reason why the second control voltage is taken in the y-axis direction is that the second control voltage is multiplied by a reference clock phase-shifted by 90 °.
- the angle formed between the line passing through the point indicated by the value of the first control voltage and the value of the second control voltage and the origin (0, 0) and the x axis is the angle to be phase-shifted. That is, this angle is the output phase from the phase shifter 101.
- the phase shift angle is determined according to the values of the first control voltage and the second control voltage.
- the phase can be shifted to an arbitrary angle by changing the values of the first control voltage and the second control voltage. Further, the phase can be shifted to all angles of 360 °.
- each delay signal delayed by the multi-stage delay buffer was output by the multiplexer selecting one of the delay signals. (Differential Nonlinearity) was large, and deteriorated as the amount of delay increased, and the linearity error of the delay time was large.
- the clock signal to be shifted is input to the phase shifter 102 to create two orthogonal signals, and the first control voltage and the second control voltage. Since the signal is synthesized after changing the amplitude of each signal according to the value of, it can be continuously shifted to an arbitrary phase. The shift amount can be shifted to all phases of 360 °. Furthermore, since the linearity of the first control voltage and the second control voltage can be easily improved as compared with the linearity of the delay time, the linearity error can be reduced.
- FIG. 4 shows an example of the configuration of the test apparatus 110 according to the second embodiment.
- the test apparatus 110 includes a reference clock source 107, a level comparator 111, a reproduction clock generation circuit 112, a data acquisition unit 113, a comparator 114, and a determination unit 115.
- the reference clock generated by the reference clock source 107 is used for controlling the operation of the device under test, that is, the DUT 150. That is, the reference clock source 107 generates a reference clock that controls the operation of the DUT 150.
- the DUT 150 operates based on the reference clock generated by the reference clock source 107 and outputs output data.
- the level comparator 111 compares the output data output from the DUT 150 with a predetermined comparison voltage to generate binary output data.
- the level comparator 111 outputs the generated output data to the phase comparator 121 and the data acquisition unit 113 of the reproduction clock generation circuit 112 described later.
- the reproduction clock generation circuit 112 generates a reproduction clock having a phase substantially equal to the reference frequency of the reference clock and substantially the same as the phase of the output data, based on the reference clock generated by the reference clock source 107.
- the reproduction clock generation circuit 112 outputs the generated reproduction clock to the data acquisition unit 113.
- the data acquisition unit 113 acquires the output value of the output data of the DUT 150 at the timing indicated by the strobe signal based on the transmitted reproduction clock.
- the data acquisition unit 113 outputs the acquired output value to the comparator 114.
- the data acquisition unit 113 may be a timing comparator.
- the strobe signal based on the recovered clock may be a signal obtained by delaying the phase of the recovered clock. Further, the reproduction clock itself may be used. When a signal obtained by delaying the phase of the reproduction clock is used as the strobe signal, a delay circuit may be provided in the data acquisition unit 113, and the delay circuit may generate the strobe signal from the reproduction clock. Alternatively, a delay circuit may be provided between the data acquisition unit 113 and the reproduction clock generation circuit 112, and the delay circuit may generate a strobe signal from the reproduction clock and output it to the data acquisition unit 113.
- the comparator 114 compares the output value sent from the data acquisition unit 113 with a predetermined expected value, and outputs fail data or pass data to the determination unit 115.
- the determination unit 115 determines the quality of the DUT 150 based on the comparison result of the comparator 114.
- the comparator 114 may acquire the expected value from the outside and compare the acquired expected value with the output value.
- the recovered clock generation circuit 112 includes a phase shifter 101, a phase comparator 121, and a control signal generator 122.
- a signal output from the phase shifter 101 is called a recovered clock. That is, the phase shifter 101 generates a reproduction clock.
- the phase comparator 121 receives the output data output from the level comparator 111 and the recovered clock output from the phase shifter 101. The phase comparator 121 compares the input output data with the phase of the recovered clock. Then, the phase comparator 121 outputs the phase shift to the control signal generator 122 as a comparison result.
- the control signal generator 122 generates a control signal based on the comparison result output from the phase comparator 121 so that the phase of the recovered clock is synchronized with the phase of the output data. Then, the control signal generator 122 outputs the generated control signal to the phase shifter 101.
- the control signal generator 122 generates a first control voltage and a second control voltage as control signals.
- the control signal generator 122 outputs the first control voltage to the first multiplier 103 of the phase shifter 101 and the second control voltage to the second multiplier 104 of the phase shifter 101.
- the phase shifter 101 continuously shifts the phase of the reference clock based on the control signal output from the control signal generator 122 to generate a recovered clock. Specifically, the first multiplier 103 of the phase shifter 101 multiplies the output first control voltage and the reference clock and outputs the result to the adder 105. The second multiplier 104 multiplies the input second control voltage by a reference clock whose phase is shifted by 90 ° and outputs the result to the adder 105.
- the adder 105 adds the input signals and outputs them to the low-pass filter 106.
- the low-pass filter 106 cuts and outputs the high frequency.
- a signal output from the low-pass filter 106 is input to the data acquisition unit 113 and the phase comparator 121 as a reproduction clock.
- FIG. 5 shows the relationship between the first control voltage and the second control voltage and the tracking range.
- the first control voltage (I side) is taken in the x-axis direction
- the second control voltage (Q side) is taken in the y-axis direction.
- the reason why the second control voltage is taken in the y-axis direction is that the second control voltage is multiplied by a reference clock phase-shifted by 90 °.
- the angle determined by the first control voltage and the second control voltage is an angle to be shifted, and is an output phase from the phase shifter 101.
- the phase can be continuously rotated without creating a discontinuous point, so that the tracking range can be made infinite. It becomes possible.
- the phase comparator 121 compares the output data of the DUT 150 with the phase of the recovered clock. Based on the comparison result, the control signal generator 122 generates the first control voltage and the second control voltage so that the phase of the output data and the phase of the recovered clock are synchronized, and the first multiplier 103, 2 outputs to 2 multipliers 104 respectively.
- the phase shifter 101 can accurately generate a reproduction clock having a phase synchronized with the phase of the output data, and the reproduction clock and the strobe signal can follow the timing fluctuation of the output data of the DUT 150. Furthermore, the device under test can be accurately tested.
- the phase delay in the IQ modulator is on the order of several tens of ps, and since the IQ modulator is used for clock recovery, the loop latency can be reduced.
- a low-pass filter having a cutoff frequency of several GHz or more can be used, so that the phase delay is several tens of ps, and the loop latency can be reduced.
- the timing margin in the data acquisition unit 113 is reduced, and deterioration in jitter tolerance can be reduced.
- the tracking range can be made infinite by using the IQ modulator. Therefore, the test performance of the test apparatus can be improved.
- a reference clock generated by one reference clock source 107 is input to the phase shifter 101, and the operation of the DUT 150 is controlled using the reference clock, but the reference clock input to the phase shifter
- a reference clock source for generating a reference clock for controlling the operation of the DUT 150 may be provided separately from the clock source for generating the.
- the frequency of the reference clock input to the phase shifter 101 may not be the same as the frequency of the reference clock that controls the operation of the DUT 150.
- the frequency of the reference clock input to the phase shifter 101 may be substantially equal to the frequency of the reference clock that controls the operation of the DUT 150.
- a frequency divider may be provided after the low-pass filter 106.
- FIG. 6 shows a block diagram of the test apparatus 110 when the frequency divider is provided in the phase shifter 101.
- the signal output from the frequency divider 130 is called a recovered clock, and the frequency divider 130 outputs the recovered clock to the data acquisition unit 113 and the phase comparator 121.
- the frequency divider 130 may be provided outside the reproduction clock generation circuit 112.
- the recovered clock generation circuit 112 outputs the recovered clock to the phase comparator 121 and the frequency divider 130, and the frequency divider outputs the divided recovered clock to the data acquisition unit 113.
- the frequency of the reference clock input to the phase shifter 101 and the frequency of the reference clock for controlling the operation of the DUT 150 can be made different according to the frequency division by the frequency divider 130.
- the frequency of the reference clock for controlling the operation of the DUT may be set to 1 / N times the frequency of the reference clock input to the phase shifter 101. it can. N may be a natural number.
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Abstract
Description
特願2008-179165 出願日 2008年7月9日
102 移相器
103 第1乗算器
104 第2乗算器
105 加算器
106 ローパスフィルタ
107 基準クロック源
110 試験装置
111 レベルコンパレータ
112 再生クロック生成回路
113 データ取得部
114 比較器
115 判定部
121 位相比較器
122 制御信号発生部
130 分周器
150 DUT
1001 信号波形
1002 信号波形
1003 信号波形
1004 信号波形
1005 信号波形
1006 信号波形
図1は、第1の実施の形態にかかるIQ変調器を用いた位相シフタ101の構成を示す。位相シフタ101は、移相器102、第1乗算器103、第2乗算器104、加算器105、ローパスフィルタ106の各構成部を備える。
図4は、第2の実施の形態にかかる試験装置110の構成の一例を示す。なお、第1の実施の形態と同様の構成部について同一の符号を付している。試験装置110は、基準クロック源107、レベルコンパレータ111、再生クロック生成回路112、データ取得部113、比較器114、判定部115を備える。
Claims (15)
- 被試験デバイスを試験する試験装置であって、
前記被試験デバイスの動作を制御する基準クロックを発生する基準クロック源と、
前記被試験デバイスが出力する出力データの位相と略等しい再生クロックを生成する再生クロック生成回路と、
前記再生クロックに基づくストローブ信号が指示するタイミングで前記出力データの出力値を取得するデータ取得部と、
前記データ取得部が取得した前記出力値を予め定められた期待値と比較する比較器と、
前記比較器の比較結果に基づき前記被試験デバイスの良否を判定する判定部と
を備え、
前記再生クロック生成回路は、
前記被試験デバイスが出力した前記出力データの位相と前記再生クロックの位相とを比較する位相比較器と、
前記位相比較器の出力に基づき、前記基準クロックの位相を連続的に移相する位相シフタと
を有する試験装置。 - 前記位相比較器の出力に基づき、前記再生クロックの位相が前記出力データの位相に同期するように制御信号を発生する制御信号発生部をさらに備え、
前記制御信号発生部は、前記制御信号として第1制御電圧および第2制御電圧を発生し、
前記位相シフタは、
前記基準クロックの位相を所定角度だけ移相する移相器と、
前記基準クロックと前記第1制御電圧とを乗算する第1乗算器と、
前記移相器の出力と前記第2制御電圧とを乗算する第2乗算器と、
前記第1乗算器および前記第2乗算器の各出力を加算する加算部と、を含む
請求項1に記載の試験装置。 - 前記移相器は、前記基準クロックの位相を略90度移相する
請求項2に記載の試験装置。 - 前記位相シフタは、前記加算部の出力に含まれる高周波を除去するローパスフィルタをさらに含む
請求項2または請求項3に記載の試験装置。 - 前記位相シフタは、前記加算部からの出力を分周する分周器をさらに含む
請求項2から請求項4の何れかに記載の試験装置。 - 前記再生クロック生成回路からの前記再生クロックを分周する分周器をさらに備え、
前記データ取得部には、前記分周器により分周された前記再生クロックに基づく前記ストローブ信号が指示するタイミングで前記出力データの出力値を取得する
請求項2から請求項4の何れかに記載の試験装置。 - 被試験デバイスを試験する試験方法であって、
基準周波数を有し、前記被試験デバイスの動作を制御する基準クロックを発生する基準クロック発生段階と、
前記被試験デバイスが出力する出力データの位相と略等しい再生クロックを生成する再生クロック生成段階と、
前記再生クロックに基づくストローブ信号が指示するタイミングで前記出力データの出力値を取得するデータ取得段階と、
前記データ取得段階で取得した前記出力値を予め定められた期待値と比較する比較段階と、
前記比較段階の比較結果に基づき前記被試験デバイスの良否を判定する判定段階と
を備え、
前記再生クロック生成段階は、
前記被試験デバイスが出力した前記出力データの位相と前記再生クロックの位相とを比較する位相比較段階と、
前記位相比較段階の出力に基づき、前記基準クロックの位相を連続的に移相する位相シフト段階と
を有する試験方法。 - 前記位相比較段階の出力に基づき、前記再生クロックの位相が前記出力データの位相に同期するように制御信号を発生する制御信号発生段階をさらに備え、
前記制御信号発生段階では、前記制御信号として第1制御電圧および第2制御電圧を発生し、
前記位相シフト段階は、
前記基準クロックの位相を所定角度だけ移相する移相段階と、
前記基準クロックと前記第1制御電圧とを乗算する第1乗算段階と、
前記移相段階での出力と前記第2制御電圧とを乗算する第2乗算段階と、
前記第1乗算段階および前記第2乗算段階での各出力を加算する加算段階と、を含む
請求項7に記載の試験方法。 - 前記移相段階では、前記基準クロックの位相を略90度移相する
請求項8に記載の試験方法。 - 前記位相シフト段階は、前記加算段階の出力に含まれる高周波を除去するローパスフィルタリング段階をさらに含む
請求項8または請求項9に記載の試験方法。 - 前記位相シフト段階は、前記加算段階からの出力を分周する分周段階をさらに含む
請求項8から請求項10の何れかに記載の試験方法。 - 前記再生クロック生成段階からの前記再生クロックを分周する分周段階をさらに備え、
前記データ取得段階では、前記分周段階により分周された前記再生クロックに基づく前記ストローブ信号が指示するタイミングで前記出力データの出力値を取得する
請求項8から請求項10の何れかに記載の試験方法。 - 交流の入力信号が入力され、前記入力信号の位相を所定角度だけ移相する移相部と、
前記入力信号および第1制御電圧が入力され、前記入力信号と前記第1制御電圧とを乗算する第1乗算部と、
前記移相部の出力信号および第2制御電圧が入力され、前記移相部の前記出力信号と前記第2制御電圧とを乗算する第2乗算部と、
前記第1乗算部および前記第2乗算部の各出力信号が入力され、前記各出力信号を加算する加算部と
を備え、
前記第1制御電圧および前記第2制御電圧により前記入力信号の位相を連続的に移相する
位相シフタ。 - 前記移相部は、前記入力信号の位相を略90度移相する
請求項13に記載の位相シフタ。 - 前記加算部の出力に含まれる高周波を除去するローパスフィルタをさらに備える
請求項13または請求項14に記載の位相シフタ。
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| JP2010519652A JP5337157B2 (ja) | 2008-07-09 | 2009-07-09 | 試験装置、及び試験方法 |
| CN200980124402XA CN102317803A (zh) | 2008-07-09 | 2009-07-09 | 测试装置、测试方法和移相器 |
| US12/980,292 US20110128044A1 (en) | 2008-07-09 | 2010-12-28 | Test apparatus, test method, and phase shifter |
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| JP5208211B2 (ja) * | 2008-07-09 | 2013-06-12 | 株式会社アドバンテスト | 試験装置、及び試験方法 |
| CN106160883A (zh) * | 2015-03-27 | 2016-11-23 | 江苏艾科半导体有限公司 | 一种射频收发器自动测试系统 |
| US9338041B1 (en) * | 2015-07-24 | 2016-05-10 | Tm Ip Holdings, Llc | Extracting carrier signals from modulated signals |
| US10403385B2 (en) * | 2017-06-30 | 2019-09-03 | Taiwan Semiconductor Manufacturing Co., Ltd. | Apparatus for memory device testing and field applications |
| US10551437B2 (en) * | 2017-07-20 | 2020-02-04 | Semiconductor Components Industries, Llc | Error rate meter included in a semiconductor die |
| CN108957119B (zh) * | 2018-09-19 | 2024-10-18 | 钜泉光电科技(上海)股份有限公司 | 采样电路的双基准互检参数检测电路及电能计量芯片 |
| US11102596B2 (en) * | 2019-11-19 | 2021-08-24 | Roku, Inc. | In-sync digital waveform comparison to determine pass/fail results of a device under test (DUT) |
| KR102278648B1 (ko) * | 2020-02-13 | 2021-07-16 | 포스필 주식회사 | 피시험 디바이스를 테스트하기 위한 방법 및 장치 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59190709A (ja) * | 1983-04-13 | 1984-10-29 | Toshiba Corp | 可変移相器 |
| JP2005285160A (ja) * | 2004-03-26 | 2005-10-13 | Advantest Corp | 試験装置及び試験方法 |
| JP2006254005A (ja) * | 2005-03-10 | 2006-09-21 | Yokogawa Electric Corp | 90゜位相差発生回路および周波数シンセサイザおよび直交変調回路および直交復調回路 |
| WO2007116695A1 (ja) * | 2006-03-31 | 2007-10-18 | Anritsu Corporation | データ信号発生装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60132412A (ja) * | 1983-12-21 | 1985-07-15 | Toshiba Corp | 可変移相回路 |
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- 2009-07-09 JP JP2010519652A patent/JP5337157B2/ja not_active Expired - Fee Related
- 2009-07-09 CN CN200980124402XA patent/CN102317803A/zh active Pending
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59190709A (ja) * | 1983-04-13 | 1984-10-29 | Toshiba Corp | 可変移相器 |
| JP2005285160A (ja) * | 2004-03-26 | 2005-10-13 | Advantest Corp | 試験装置及び試験方法 |
| JP2006254005A (ja) * | 2005-03-10 | 2006-09-21 | Yokogawa Electric Corp | 90゜位相差発生回路および周波数シンセサイザおよび直交変調回路および直交復調回路 |
| WO2007116695A1 (ja) * | 2006-03-31 | 2007-10-18 | Anritsu Corporation | データ信号発生装置 |
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| CN102317803A (zh) | 2012-01-11 |
| US20110128044A1 (en) | 2011-06-02 |
| JP5337157B2 (ja) | 2013-11-06 |
| JPWO2010004754A1 (ja) | 2011-12-22 |
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