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KR900004634Y1 - Tone/voice switching circuit in 4-lines telephone - Google Patents

Tone/voice switching circuit in 4-lines telephone Download PDF

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Publication number
KR900004634Y1
KR900004634Y1 KR2019870003689U KR870003689U KR900004634Y1 KR 900004634 Y1 KR900004634 Y1 KR 900004634Y1 KR 2019870003689 U KR2019870003689 U KR 2019870003689U KR 870003689 U KR870003689 U KR 870003689U KR 900004634 Y1 KR900004634 Y1 KR 900004634Y1
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tone
circuit
signal
resistor
voice
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KR880018706U (en
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최윤근
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동양정밀공업 주식회사
권혁조
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/04—Transistors

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

내용 없음.No content.

Description

4선식 전화기의 톤(TONE)/보이스(VOICE)출력제어회로Tone / Voice Output Control Circuit for Four-Wire Telephones

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 음성신호 입력단 2 : 음성전송 억제신호입력단1: Voice signal input terminal 2: Voice transmission suppression signal input terminal

3 : DTMF(Dual Tone Multi Frequency)제어신호 입력단3: DTMF (Dual Tone Multi Frequency) control signal input terminal

4 : 브리지회로 5 : 합성회로출력단4: Bridge circuit 5: Synthetic circuit output terminal

TR1, TR2: 스위칭트랜지스터 C1-C3: 적분콘덴서TR 1 , TR 2 : switching transistor C 1 -C 3 : integral capacitor

C4, C5: 결합콘덴서 R1-R11: 저항C 4 , C 5 : coupling capacitor R 1 -R 11 : resistance

VR1: 가변저항VR 1 : Variable resistor

본 고안은 4선식 전화기에 관한 것으로 특히 4선식 전화기에 이용되는 여러가지 톤(TONE)과 음성(VOICE)이 입력회로를 통해 들어와 교환기를 통해 출력될때 이들을 제어 신호에 의한 스위칭 동작으로 음성신호와 기타 신호간의 상호간섭을 배제하도록 한 4선식 전화기의 톤/보이스 출력제어회로에 관한 것이다.The present invention relates to a four-wire telephone, and in particular, when various tones and voices used in four-wire telephones are inputted through an input circuit and outputted through an exchange, these signals are switched by control signals. It relates to a tone / voice output control circuit of a four-wire telephone system which eliminates mutual interference.

종래의 일반적인 4선식 전화기에서는 적절한 통신접촉을 취해 호출자와 응답자의 송수화기 재치상태에 따라 호출자와 교환기와 응답자 사이에 여러 형태의 톤신호(예를 들면 Ring Tone, DTMF Tone, Seize Tone, Release Tone등)을 주고 받게 되고 또한 통화에 따른 음성신호를 주고 받게 되는데 이러한 기능의 종래 전화기는 각각 별도로 구성되어 있는 톤신호 발생부에서 출력되는 톤신호들과 음성신호가 합성회로를 통해 교환기로 출력되도록 구성되어 있어서 서로 다른 톤끼리 중첩될때는 파형의 간섭현상으로 인한 파형왜곡현상이 발생되었고, 또 톤의 품질이나 크기, 위상을 개선하고자 하는 경우에는 각각 따로 구성된 회로구성으로 인해 어려움이 많았다.In the conventional general 4-wire telephone, various types of tone signals (for example, Ring Tone, DTMF Tone, Seize Tone, Release Tone, etc.) are established between the caller and the exchanger and the responder depending on the caller and the responder's handset state. In addition, the conventional telephone of this function is configured to output the tone signals and the voice signals output from the tone signal generator, which are separately configured, to the exchange through the synthesis circuit. When the different tones overlap each other, waveform distortion occurs due to the interference of the waveform, and in order to improve the quality, size, and phase of the tone, it is difficult due to the circuit configuration separately configured.

본 고안은 이러한 종래의 문제점을 개선하기 위해 안출한 것으로서 입력신호인 축음이나 키보드를 누를때 발생되는 DTMF신호를 각 제어신호에 의한 트랜지스터의 스위칭 작용으로 4선식 전화기의 합성회로 출력단에 나타나는 톤과 음성신호의 상호간섭을 배제하도록 한 것으로 이를 첨부도면에 의해 상세히 설명하면 다음과 같다.The present invention was devised to improve such a conventional problem. Tone and voice appearing at the output of the synthesized circuit of a 4-wire telephone by switching the transistor by each control signal from the DTMF signal generated when the input signal, such as a phonograph or a keyboard is pressed. The mutual interference of the signal is to be excluded, which will be described in detail by the accompanying drawings.

송신회로로 연결된 음성신호입력단(1)은 콘덴서(C1)와 스위칭트랜지스터(TR1)의 콜렉터-에미터를 통해 병렬로 접지하고, 또 저항(R1)과 가변저항(VR1)을 직렬로 거쳐 합성회로 출력단(5)에 연결하며, 고주파 및 저주파가 출력되는 키보드의 톤신호 입력단(VIN1)(VIN2)은 각 저항(R2)(R4)과 콘덴서(C2)(C3)를 통해 접지한 후 결합콘덴서(C4)(C5)와 저항(R3)(R5)을 거쳐 브러지회로(4)의 입력단(A)(B)에 연결하고 제어신호인 음성 전송 억제신호입력단(2)과 DTMF제어신호입력단(3)은 두 저항(R6)(R7)을 각각 거쳐 스위칭 트랜지스터(TR1)(TR2)의 베이스에 접속하여 구성하며, 여기서 합성회로 출력단(5)으로 접속되는 브리지회로(4)의 두 저항(R8)(R10)은 스위칭 트랜지스터(TR2)의 콜렉터-에미터로 접지되는 저항(R9)(R11)값보다 크도록 설정하여 구성한다.The audio signal input terminal 1 connected to the transmitting circuit is grounded in parallel through the collector-emitter of the capacitor C 1 and the switching transistor TR 1 , and the resistor R 1 and the variable resistor VR 1 are connected in series. To the synthesizer circuit output terminal (5), and the tone signal input terminal (VIN 1 ) (VIN 2 ) of the keyboard for outputting high frequency and low frequency is each resistor (R 2 ) (R 4 ) and capacitor (C 2 ) (C 3 ) After grounding through the coupling capacitor (C 4 ) (C 5 ) and the resistor (R 3 ) (R 5 ) to the input terminal (A) (B) of the bridge circuit (4) and the control signal voice The transmission suppression signal input terminal 2 and the DTMF control signal input terminal 3 are configured by connecting to the base of the switching transistor TR 1 and TR 2 via two resistors R 6 and R 7 , respectively, wherein the synthesis circuit The two resistors R 8 (R 10 ) of the bridge circuit 4 connected to the output terminal 5 are greater than the values of the resistors R 9 (R 11 ) which are grounded to the collector-emitter of the switching transistor TR 2 . To configure it.

이와같이 구성되는 본 고안의 작용효과는 다음과 같다.The effect of the present invention configured as described above is as follows.

전화기의 수화기를 들었을때 음성전송억제신호는 LOW레벨로 저항(R6)을 통해 스위칭트랜지스터(TR1)의 베이스에 인가되어 스위칭 트랜지스터(TR1)가 오프상태에 있게 되므로 송화회로에서 들어오는 음성(측음)입력신호는 저항(R1)가 가변저항(VR1)을 통해 합성회로의 축음출력으로 나가게 되며 이 상태에서 DTMF제어신호도 LOW레벨로 저항(R7)을 통해 스위칭 트랜지스터(TR2)에 인가되므로 스위칭 트랜지스터(TR2)도 오프상태로 있게 되어서 키보드의 버튼을 누를때 발생되는 고주파 및 저주파의 DTMF신호는 저항(R2)(R4), 적분콘덴서(C2)(C3), 및 결합콘덴서(C4)(C5), 저항(R3)(R5)을 통해 브리지회로(4)의 입력단(A)(B)에 각각 인가되어 두 저항(R8)(R10)을 거쳐 합성된 후 교환기의 출력으로 나가게 된다.When the handset of the telephone is heard, the voice transmission suppression signal is applied to the base of the switching transistor TR 1 through the resistor R 6 at the LOW level so that the switching transistor TR 1 is in the off state. side tone) input signal resistor (R 1) through a variable resistor (VR 1), the resistance (R 7) also DTMF control signals to the LOW level in this state, and out the chukeum output of the combining circuit via a switching transistor (TR 2) Since the switching transistor TR 2 is also turned off, the high-frequency and low-frequency DTMF signals generated when a button on the keyboard is pressed are resistors R 2 (R 4 ) and integrating capacitor (C 2 ) (C 3 ). and a coupling capacitor (C 4) (C 5) , resistance (R 3) (R 5) the two resistors are applied respectively to an input terminal (a) (B) of the bridge circuit (4) (R 8) ( R 10 through After synthesis, it is output to the exchange.

한편 통화상태에서는 음성전송억제 신호가 HiGH레벨로 되어 스위칭 트랜지스터(TR1)를 턴-온시키므로 송화회로로 부터 들어오는 측음신호는 트랜지스터(TR1)의 콜렉터-에미터를 통해 바이패스되어 합성회로의 출력단(5)에 측음이 나타나는 것이 억제된 상태로 되며 이상태에서 DTMF제어신호가 LOW레벨로 스위칭 트랜지스터(TR2)의 베이스에 인가되면 스위칭트랜지스터(TR2)가 오프상태가 되므로 저항(R2)과 직분콘덴서(C2) 결합콘덴서(C4)및 저항(R3)을 통해 브리지 회로(4)의 입력단(A)에 인가되는 키보드 버튼의 고주파신호는 브리지회로(4)의 출력단 저항(R8)가 저항(R9)보다 크게 설정되어 있기 때문에 저항(R8)을 거쳐 브리지회로(4)의 출력단(D)에 나타나게 되고, 또 저항(R4)과 적분콘덴서(C3)결합콘덴서(C5)및 저항(R5)을 통해 브리지회로(4)의 입력단(B)에 인가되는 지주파 신호는 브리지회로(4)의 출력단(D)에서 상기의 고주파신호와 합성된 후 교환기의 합성회로 출력단(5)에 나타나게 되며, 이와는 반대로 DTMF제어 신호가 HiGH레벨로 스위칭트랜지스터(TR2)에 인가되면 스위칭 트랜지스터(TR2)가 턴-온상태로 되므로 브리지회로(4)의 두입력단(A)(B)에 인가되는 키보드의 DTMF신호 즉 고주파와 저주파 신호는 저항(R9)(R11)을 통해 트랜지스터(TR2)콜렉터-에미터로 바이패스되므로 교환기의 합성회로 출력단(5)에는 축음신호와 함께 키보드의 DTMF신호가 억제되는 것이다. 따라서 본 고안은 적절한 제어신호를 통한 스위칭이 출력단에서의 음성신호와 기타 신호간의 상호간섭을 제어하여 전화기의 음성 출력단에서 깨끗한 음성신호를 얻을수 있도록 한 유용한 고안이라 할수 있다.On the other hand, in the call state, the voice transmission suppression signal becomes the HiGH level and turns on the switching transistor TR 1 , so that the sidetone signal coming from the talk circuit is bypassed through the collector-emitter of the transistor TR 1 and and with that side tone appears on an output terminal (5) inhibition state when the DTMF control signals in this state is applied to the base of the switching transistor (TR 2) to a LOW level, the switching transistor (TR 2) is because the off-state resistance (R 2) The high frequency signal of the keyboard button applied to the input terminal A of the bridge circuit 4 through the combined capacitor C 2 and the coupling capacitor C 4 and the resistor R 3 is the output terminal resistance R of the bridge circuit 4. 8 ) is set larger than the resistor R 9 so that it appears at the output terminal D of the bridge circuit 4 via the resistor R 8 , and the resistor R 4 and the integrating capacitor C 3 are combined. Input of bridge circuit 4 via (C 5 ) and resistor (R 5 ) The propagation wave signal applied to the output stage B is synthesized with the high frequency signal at the output terminal D of the bridge circuit 4 and then appears at the synthesis circuit output terminal 5 of the exchanger. If a is applied to the switching transistor (TR 2), the switching transistor (TR 2) is turned on since the oN state DTMF signal from the keyboard to be applied to the two input terminals (a) (B) of the bridge circuit 4, i.e., the high-frequency and low-frequency signal resistance (R 9) (R 11), a transistor (TR 2) through the collector-emitter has a bypass, so combining circuit output terminal 5 of the heat exchanger becomes a DTMF signal from the keyboard with the inhibition chukeum signal. Therefore, the present invention can be said to be a useful design in which switching through an appropriate control signal controls the mutual interference between the voice signal at the output terminal and other signals to obtain a clean voice signal at the voice output terminal of the telephone.

Claims (1)

4선식 전화기에 있어서, 송신회로로 연결된 음성신호 입력단(1)은 콘덴서(C1)와 트랜지스터(TR1)의 콜렉터-에미터를 통해 병렬로 접지하고, 또 저항(R1)과 가변저항(VR1)을 직렬로 거쳐 합성회로의 출력단(5)에 연결하며, 키보드의 톤신호 입력단(VIN1)(VIN2)은 각 저항(R2)(R4)과 콘덴서(C2)(C3)를 통해 접지한 후 결합콘덴서(C4)(C5)와 저항(R3)(R5)을 거쳐 브리지 회로(4)의 입력단(A)(B)에 연결하고, 제어신호인 음성전송억제신호와 DTMF제어신호는 두저항(R6)(R7)을 따로 거쳐 트랜지스터(TR1)(TR2)를 온-오프시키도록 접속하며 브리지회로(4)의 출력제어단(C)은 트랜지스터(TR2)의 콜렉터-에미터로 접지한 것을 특징으로 하는 4선식 전화기의 톤/보이스 출력제어회로.In a 4-wire telephone, the voice signal input terminal 1 connected to the transmitting circuit is grounded in parallel through the collector-emitter of the capacitor C 1 and the transistor TR 1 , and the resistor R 1 and the variable resistor ( VR 1 ) is connected in series to the output terminal 5 of the synthesis circuit, and the tone signal input terminals (VIN 1 ) (VIN 2 ) of the keyboard are each resistor (R 2 ) (R 4 ) and capacitor (C 2 ) (C 3 ) After grounding through the coupling capacitor (C 4 ) (C 5 ) and the resistor (R 3 ) (R 5 ) and connected to the input terminal (A) (B) of the bridge circuit (4), the control signal voice The transmission suppression signal and the DTMF control signal are connected to turn on and off the transistors TR 1 and TR 2 separately through two resistors R 6 and R 7 , and the output control terminal C of the bridge circuit 4 is connected. A tone / voice output control circuit of a four-wire telephone set, which is grounded by a collector-emitter of a transistor (TR 2 ).
KR2019870003689U 1987-03-23 1987-03-23 Tone/voice switching circuit in 4-lines telephone Expired KR900004634Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870003689U KR900004634Y1 (en) 1987-03-23 1987-03-23 Tone/voice switching circuit in 4-lines telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870003689U KR900004634Y1 (en) 1987-03-23 1987-03-23 Tone/voice switching circuit in 4-lines telephone

Publications (2)

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KR880018706U KR880018706U (en) 1988-10-29
KR900004634Y1 true KR900004634Y1 (en) 1990-05-25

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KR2019870003689U Expired KR900004634Y1 (en) 1987-03-23 1987-03-23 Tone/voice switching circuit in 4-lines telephone

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