201012059 i w^vmm 六、發明說明： 【發明所屬之技術領域】 > ^ a 本發明是有關於一種巴倫器，且特別疋 ；^ 有濾波功能之巴倫器 【先前技術】 隨著無線通訊產業蓬勃發展，通訊商品不斷被研究開 發，如何提升通訊商品之效用，成為眾所追求的目標之 一。通訊商品中之通訊裝置之射頻模組包括天線、低雜訊 放大器、濾波器及巴倫器等等。 當通訊裝置中之天線接收到無線訊號之後，由天線輸 出之單埠電訊號會輸出至巴倫器。巴倫器將會把單埠電訊 號轉換成雙埠電訊號，並輪出給下級電路進行處理。有 時’如果濾、波器的濾波欵果不夠好的話，巴倫器需同時具 有濾波之功能。因此’如何提出具有濾波效果的巴倫器， 【發明内容】 本發明係有關於一種巴倫器，可增加巴倫器之止帶 (stopband)之衰減率，使得巴倫器具有良好的濾波效果。 根據本發明一’提出一種巴倫器，包括一第一電感元 件、$一電感兀件、一第一電容元件、一第二電容元件、 -第三電容元件以及1三電感元件。第—電感元件具有 一第了端及n ’第—端用以接收-輸人訊號。第二 電感元件具有-第三端及—第四端，第三端用以輸出對應 201012059 至該輸入訊號之一第一輸出訊號，第四端用以輸出對應至 該輸入訊號之一第二輸出訊號。第一輸出訊號與第二輸出 訊號之振幅係實質上相同，相位係實質上相反，第二電感 元件與第一電感元件產生互感。第一電容元件係耦接至第 一端。第二電容元件係耦接至第三端。第三電容元件係耦 接至第四端。第三電感元件係與第一電容元件、第二電容 元件及第三電容元件三者之一串聯。 為讓本發明之上述内容能更明顯易懂，下文特舉較佳 ❿ 實施例，並配合所附圖式，作詳細說明如下： 【實施方式】 本發明係提出一種巴倫器，包括一第一電感元件、一 第二電感元件、一第一電容元件、一第二電容元件、一第 三電容元件以及一第三電感元件。第一電感元件具有一第 一端及一第二端，第一端用以接收一輸入訊號。第二電感 元件具有一第三端及一第四端，第三端用以輸出對應至該 ❿ 輸入訊號之一第一輸出訊號，第四端用以輸出對應至輸入 訊號之一第二輸出訊號。第一輸出訊號與第二輸出訊號之 振幅係實質上相同，相位係實質上相反，第二電感元件與 第一電感元件產生互感。第一電容元件係耦接至第一端。 第二電容元件係耦接至第三端。第三電容元件係耦接至第 四端。第三電感元件係與第一電容元件、第二電容元件及 第三電容元件三者之一串聯。茲舉多個實施例說明如下。 請參照第1圖，其繪示係本發明一實施例之巴倫器之 電路圖。巴倫器100包括第一電感元件L1、第二電感元件 5 201012059 i ννουι^ΐΆ L2、第-電容元件Cl、第二電容元件C2、第三電容元件 C3以及第二電感元件L3。第一電感元件u具有第一端 E1及第二端E2,第〜端E1用以接收輸入訊號。第二電感 元件L2具有第二端石3及第四端E4。第三端E3用以輸出 對應至輸入訊號之第〜輸出訊號，第四端E4用以輸出對 應至輸入訊號之第二輪出訊號。第一輸出訊號與第二輸出 訊號之振幅係實質上相同，相位係實質上相反，第二電感 凡件L2與第—電感元件L1產生互感。第-輸出訊號與第 二輸出訊號係為差動訊號。 如第1圖所示，第-電容元件C1係耦接至第一端 E1，第二電容疋件C2係搞接至第三端E3，第三電容元件 C3係耦接至第四端这4。第三電感元件L3係與第一電容元 件C1串聯，第三電咸元件L3之一端E5係接地。第二電 容元件C2及第三電容元件C3之一端E6、E7係接地。雖 然本實施例之第三電感元件L3係與第一電容元件C1串 聯，然本發明並不限於此。第三電感元件L3亦可與第二 電容元件C2或第三電容元件C3串聯。當第三電感元件 L3係與第二電容元件C2串聯時，第三電感元件L3之不 與第二電容元件C2連接之一端係接地’而當第三電感元 件L3係與第三電容元件C3串聯時，第三電感元件L3不 與第二電容元件C2連接之一端係接地。 請同時參照第1圖及第2圖，第2圖繪示第1圖之巴 倫器於差模（Differential Mode)時之模擬電路圖。於進行模 擬時，係假設巴倫器1〇〇與輸入端阻抗R1、負載端阻抗 R2及負載端阻抗R3電性連接來進行模擬。輸入端阻抗 201012059201012059 iw^vmm VI. Description of the invention: [Technical field to which the invention pertains] > ^ a The present invention relates to a balun device, and is particularly 疋;^ a balun having a filtering function [Prior Art] With wireless communication The industry is booming, communication products are constantly being researched and developed, and how to improve the utility of communication products has become one of the goals pursued by the public. The RF modules of communication devices in communication products include antennas, low noise amplifiers, filters, and baluns. When the antenna in the communication device receives the wireless signal, the electrical signal output by the antenna is output to the balun. The balun will convert the chirp signal into a double-twist signal and take turns to process the sub-circuit. Sometimes, if the filtering effect of the filter and the filter is not good enough, the balun must have the function of filtering at the same time. Therefore, 'how to propose a balun with filtering effect, the present invention relates to a balun device, which can increase the attenuation rate of the stopband of the balun, so that the balun has good filtering effect. . According to the present invention, a balun device includes a first inductive element, an inductive element, a first capacitive element, a second capacitive element, a third capacitive element, and a third inductive element. The first inductive component has a first end and an n'th end for receiving the input signal. The second inductive component has a third end and a fourth end, the third end is configured to output a first output signal corresponding to one of the input signals of 201012059, and the fourth end is configured to output a second output corresponding to the one of the input signals Signal. The amplitudes of the first output signal and the second output signal are substantially the same, the phase is substantially opposite, and the second inductive element and the first inductive element have a mutual inductance. The first capacitive element is coupled to the first end. The second capacitive element is coupled to the third end. The third capacitive element is coupled to the fourth end. The third inductive element is connected in series with one of the first capacitive element, the second capacitive element, and the third capacitive element. In order to make the above-mentioned contents of the present invention more comprehensible, the following detailed description of the embodiments and the accompanying drawings will be described in detail as follows: [Embodiment] The present invention provides a balun device, including a first An inductor component, a second inductor component, a first capacitor component, a second capacitor component, a third capacitor component, and a third inductor component. The first inductive component has a first end and a second end, and the first end is configured to receive an input signal. The second inductive component has a third end and a fourth end, the third end is configured to output a first output signal corresponding to the one of the input signals, and the fourth end is configured to output a second output signal corresponding to one of the input signals . The amplitudes of the first output signal and the second output signal are substantially the same, the phase is substantially opposite, and the second inductance element and the first inductance element have mutual inductance. The first capacitive element is coupled to the first end. The second capacitive element is coupled to the third end. The third capacitive element is coupled to the fourth end. The third inductive component is connected in series with one of the first capacitive element, the second capacitive element, and the third capacitive element. A number of embodiments are described below. Referring to Figure 1, there is shown a circuit diagram of a balun in accordance with an embodiment of the present invention. The balun 100 includes a first inductance element L1, a second inductance element 5 201012059 i ννουι^ΐΆ L2, a first capacitance element C1, a second capacitance element C2, a third capacitance element C3, and a second inductance element L3. The first inductive component u has a first end E1 and a second end E2, and the first end E1 is for receiving an input signal. The second inductive element L2 has a second end stone 3 and a fourth end E4. The third end E3 is for outputting the first output signal corresponding to the input signal, and the fourth end E4 is for outputting the second round output signal corresponding to the input signal. The amplitudes of the first output signal and the second output signal are substantially the same, the phase is substantially opposite, and the second inductor L2 and the first inductance element L1 generate mutual inductance. The first output signal and the second output signal are differential signals. As shown in FIG. 1, the first capacitive element C1 is coupled to the first end E1, the second capacitive element C2 is coupled to the third end E3, and the third capacitive element C3 is coupled to the fourth end. . The third inductance element L3 is connected in series with the first capacitance element C1, and one end E5 of the third electric salt element L3 is grounded. One ends E6 and E7 of the second capacitive element C2 and the third capacitive element C3 are grounded. Although the third inductance element L3 of the present embodiment is connected in series with the first capacitance element C1, the present invention is not limited thereto. The third inductance element L3 may also be connected in series with the second capacitance element C2 or the third capacitance element C3. When the third inductive component L3 is connected in series with the second capacitive component C2, the third inductive component L3 is not connected to the second capacitive component C2, and the third inductive component L3 is connected in series with the third capacitive component C3. At the time, the third inductance element L3 is not grounded to one end of the second capacitance element C2. Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 2 is a schematic diagram showing the analog circuit of the balun device of FIG. 1 in the differential mode. For simulation, it is assumed that the balun is electrically connected to the input terminal impedance R1, the load terminal impedance R2, and the load terminal impedance R3 for simulation. Input impedance 201012059
, 11 w jwinrA R1之一端係耦接至第一端El’輸入端阻抗R1之另一端係 接地。負載端阻抗R2之一端係偶接至第三端E3，負载端 阻抗R2之另一端係接地。負載端阻抗R3之一端係偶接至 第四端E4，負載端阻抗R3之另一端係接地。 利用下列所述之參數代入第2圖所示之元件進行模 擬：Ll=L2=3nH，L3=0.45 nH，Cl=1.5 pF，C2=2 3 pF， C3=2.7pF，R1=R2=R3=50Q。 請參照第3圖，其繪示第2圖之第一輸出訊號與第二 • 輸出訊號之振幅差的模擬結果圖。如第3圖所示，於頻帶 2 GHz〜3 GHz中，由巴倫器1〇〇之振幅平衡之曲線1()2顯 示出’第一輸出訊號與第二輸出訊號之振幅差（AmpHtude im-balance)約為ldB到1.2dB，係介於容許誤差範圍内。 清參照第4圖，其缯'示第.2圖之第一輸出訊號與第二 輸出訊號之相位差的模擬結果圖。如第4圖所示，於頻帶 2 GHz〜3 GHz中，由巴倫器1〇〇之相位平衡之曲線1〇4顯 示出’第一輸出訊號與第二輸出訊號之相位差約為3度至 ⑩ 4.5度之間，介於容許誤差範圍内。 請參照第5圖，其繪示第1圖之巴倫器於共模 (Common Mode)時之模擬電路圖。於進行模擬時，係假設 巴倫器100與輸入端阻抗R4與負载端阻抗R5電性連接來 進行模擬。輸入端阻抗R4之一端係耗接第一端Ei，輸入 端阻抗R4之另一端係接地。第二電容元件匚2之一端E6 與第三電容元件C3之一端E7分別耦接至負載端阻抗R5 之兩端。 请參照第6圖，其續示將第1圖之巴倫器之第三電感 7 201012059, 11 w jwinrA R1 one end is coupled to the first end El' input end of the impedance R1 is grounded. One end of the load terminal impedance R2 is coupled to the third terminal E3, and the other end of the load terminal impedance R2 is grounded. One end of the load terminal impedance R3 is coupled to the fourth end E4, and the other end of the load end impedance R3 is grounded. The simulation is performed by substituting the parameters described below into the elements shown in Fig. 2: Ll = L2 = 3nH, L3 = 0.45 nH, Cl = 1.5 pF, C2 = 2 3 pF, C3 = 2.7 pF, R1 = R2 = R3 = 50Q. Please refer to FIG. 3, which shows a simulation result of the amplitude difference between the first output signal and the second output signal in FIG. As shown in Fig. 3, in the frequency band 2 GHz to 3 GHz, the amplitude balance 1() 2 of the balun is 1' shows the amplitude difference between the first output signal and the second output signal (AmpHtude im -balance) is about ldB to 1.2dB, which is within the tolerance range. Referring to Fig. 4, a graph showing the result of the phase difference between the first output signal and the second output signal of Fig. 2 is shown. As shown in Fig. 4, in the frequency band 2 GHz to 3 GHz, the phase balance curve 1〇4 of the balun device shows that the phase difference between the first output signal and the second output signal is about 3 degrees. Between 10 and 4.5 degrees, within the tolerance range. Please refer to FIG. 5, which shows an analog circuit diagram of the balun of FIG. 1 in Common Mode. For the simulation, it is assumed that the balun 100 is electrically connected to the input terminal impedance R4 and the load terminal impedance R5 for simulation. One end of the input terminal impedance R4 is connected to the first end Ei, and the other end of the input end impedance R4 is grounded. One end E6 of the second capacitive element 匚2 and one end E7 of the third capacitive element C3 are respectively coupled to both ends of the load terminal impedance R5. Please refer to Figure 6, which continuation of the third inductance of the balun of Figure 1. 201012059
1 w^uinrA 元件L3移除後’於共模（c〇min〇n Mode)時之模擬電路1 w^uinrA After the component L3 is removed, the analog circuit in the common mode (c〇min〇n Mode)
請參照第7圖，其繪示依照第5圖及第6圖之巴圖。 之模擬電路之插入損失(Insertion Loss)的模擬結果圖器 線108係對應至第5圖，而曲線1 〇6係對應至第6圖 倫器100之插入損失之曲線1()8於頻率7.5 GHz附近乓巴 一零點（zero)，而使得零點附近的止帶的衰減率大於曲= 106之止帶的衰減率。如此，本實施例之巴倫器1〇〇確實 具有濾波效果，其濾波效果可以彌補其他濾波器之不足。 又’可藉由調整巴倫器100中上述之第三電感元件匕3之° 電感值’以調整零點的頻率。 然，本實施例之巴倫器不限於僅使用一個電感元件串 聯一個電容元件，亦可使用多個電感元件來分別與多個電 容串聯。Please refer to FIG. 7 , which shows a diagram according to FIG. 5 and FIG. 6 . The simulation result of the insertion loss of the analog circuit (the instrumentation line 108 corresponds to the fifth figure, and the curve 1 〇6 corresponds to the insertion loss curve of the 6th toluene device 100 () 8 at the frequency 7.5 The pitch of the gamma near GHz is zero, so that the attenuation rate of the stop band near the zero point is greater than the attenuation rate of the band of the curve = 106. Thus, the balun 1〇〇 of the embodiment does have a filtering effect, and the filtering effect can make up for the deficiencies of other filters. Further, the frequency of the zero point can be adjusted by adjusting the inductance value of the third inductance element 匕3 described above in the balun 100. However, the balun of the present embodiment is not limited to using one inductive element in series with one capacitive element, and a plurality of inductive elements may be used to be respectively connected in series with a plurality of capacitors.
請參照第8圖，其繪示本發明之巴倫器之另—實施例 之電路圖。巴倫器100A包括第一電感元件L1A、第二電 感元件L2A、第一電容元件C1A、第二電容元件C2A、第 二電容元件C3A、第三電感元件L3A以及第四電感元件 L4A。第一電感元件L1A具有第一端E1A及第二端贮八， 第一端E1A用以接收輸入訊號，第二端E2A係接地。第 二電感元件L2A具有第三端E3A及第四端E4A。第一電 容元件C1A係叙接至第一端eia，第一電容元件C1A之 一端E5A係接地。第二電容元件C2A係耦接至第三端 E3A，第三電容元件C3A係耦接至該第四端E4A。第三電 感元件L3A係與第二電容元件C2A串聯，第三電感元件 L3A之一端E6A係接地。第四電感元件L4A係與第三電 8 201012059 I v 1. T* V XTX ΓΛ. 容元件C3A串聯，第四電感元件L4A之一端E7A係接地。 請同時參照第8圖及第9圖，第9圖繪示第8圖之巴 倫器於差模時之模擬電路圖。於進行模擬時，係假設巴倫 器100A與輸入端阻抗r1a、負載端阻抗R2A及負載端阻 抗R3A電性連接來進行模擬。輸入端阻抗R1A之一端係 耦接至第一端El A，輸入端阻抗R1 a之另一端係接地。負 載端阻抗R2A之一端係耦接至第三端E3A，負載端阻抗 R2A之另一端係接地。負載端阻抗R3a之一端係耦接至 _ 第四端E4A，負載端阻抗R3A之另一端係接地。 利用下列所述之參數代入第9圖所示之元件進行模 擬：LlA=3nH，L2A=3nH，L3A=0.45nH，L4A=0.l75nH， RlA=R2A=R3A=5〇n» Cl A=1.5 pF » C2A=2.3 pF»C3A=2.7 pF ° 請參照第10圖，其繪示第9圖之第一輸出訊號與第 二輸出訊號之振幅差的模擬結果圖。於頻帶2GHz〜3 GHz 中’由巴倫器100A之振幅平衡之曲線11〇顯示出，第一 ❹ 輸出訊號與第二輸出訊號之振幅差約為〇.4dB到-0.9dB。 係介於容許誤差範圍内。 請參照第11圖，其繪示第9圖之第一輸出訊號與第 二輸出訊號之相位差的模擬結果圖。如第11圖所示，於 頻帶2 GHz〜3 GHz中，由巴倫器100A之相位平衡之曲線 112顯示出，第一輸出訊號與第二輸出訊號之相位差約為 1.5度至-1.5度之間，係介於容許誤差範園内。 請參照第12圖，其繪示第8圖之巴倫器於共模時之 模擬電路圖。於進行模擬時，係假設巴倫器100A與輸入 9 201012059Referring to Figure 8, there is shown a circuit diagram of another embodiment of the balun of the present invention. The balun 100A includes a first inductance element L1A, a second inductance element L2A, a first capacitance element C1A, a second capacitance element C2A, a second capacitance element C3A, a third inductance element L3A, and a fourth inductance element L4A. The first inductive component L1A has a first end E1A and a second end. The first end E1A is for receiving an input signal, and the second end E2A is grounded. The second inductance element L2A has a third end E3A and a fourth end E4A. The first capacitive element C1A is connected to the first end eia, and one end E5A of the first capacitive element C1A is grounded. The second capacitive element C2A is coupled to the third end E3A, and the third capacitive element C3A is coupled to the fourth end E4A. The third inductive element L3A is connected in series with the second capacitive element C2A, and one end E6A of the third inductive element L3A is grounded. The fourth inductance element L4A is connected to the third power 8 201012059 I v 1. T* V XTX 容. The capacitive element C3A is connected in series, and one end E7A of the fourth inductance element L4A is grounded. Please refer to Fig. 8 and Fig. 9 at the same time. Fig. 9 is a schematic circuit diagram of the balun device of Fig. 8 in the differential mode. For the simulation, it is assumed that the balun 100A is electrically connected to the input terminal impedance r1a, the load terminal impedance R2A, and the load terminal impedance R3A for simulation. One end of the input terminal impedance R1A is coupled to the first end El A, and the other end of the input end impedance R1 a is grounded. One end of the load terminal impedance R2A is coupled to the third end E3A, and the other end of the load end impedance R2A is grounded. One end of the load terminal impedance R3a is coupled to the fourth terminal E4A, and the other end of the load terminal impedance R3A is grounded. The simulation is performed by substituting the parameters described below into the elements shown in Fig. 9: LlA = 3nH, L2A = 3nH, L3A = 0.45nH, L4A = 0.175nH, RlA = R2A = R3A = 5〇n» Cl A = 1.5 pF » C2A=2.3 pF»C3A=2.7 pF ° Please refer to Fig. 10, which shows a simulation result of the amplitude difference between the first output signal and the second output signal in Fig. 9. In the frequency band 2 GHz to 3 GHz, the amplitude balance of the amplitude distribution of the balun 100A shows that the amplitude difference between the first output signal and the second output signal is about 〇.4 dB to -0.9 dB. The system is within the tolerance range. Referring to Fig. 11, a simulation result diagram showing the phase difference between the first output signal and the second output signal in Fig. 9 is shown. As shown in FIG. 11, in the frequency band 2 GHz to 3 GHz, the phase balance curve 112 of the balun 100A shows that the phase difference between the first output signal and the second output signal is about 1.5 degrees to -1.5 degrees. Between, the system is within the allowable error range. Please refer to Fig. 12, which shows an analog circuit diagram of the balun of Fig. 8 in common mode. For the simulation, assume the balun 100A and input 9 201012059
l w^ui^rA 端阻抗R4A及負載端阻抗R5A電性連接來進行模擬。輸 入端阻抗R4A之一端係耦接第一端mA，輸入端阻抗R4A 之另一端係接地。第三電感元件L3A之一端E6A與第四 電感元件L4 A之—端E7 A分職接至負載端阻抗R5 a之 兩端。 請參照第13 @，其緣示依照帛6圖及帛12圖之巴倫 器之模擬電路之插入損失的模擬結果圖。曲線114係對應 至第6圖，而曲線118係對應至第12圖。巴倫器i〇〇A之 插入損失㈣118於頻帛5.7 GHz附近具有一零點而使 得零點附近的止帶的衰減率大於曲線116之止帶的衰減 率。又’可藉由調整巴倫器100A中上述之第三電感元件 L3及第四電感元件L4之電感值，以調整零點的頻率。 請參照帛14®，其繪示本發明之巴檢器之更另一實 施例。與第1圖不同的是巴倫器議更包括第四電感元 件L4B與第五電感元件L5B。第四電感元件l4b係與第 二電容元件C2串聯’第四電感元件⑽之—端膽係接 地。第五電感元件L5B係與第三電容元件C3串聯，第五 電感元件L5B之-端E7B係接地。若本實施例之第三電 感7G件L3、第四電感元件L4B不相同時可於插入損失 之頻率響應圖中產生二個位於不同頻率的零點。 本發明之巴倫器具有良好的濾波效果，可增加巴倫器 之止帶之衰減率，使得巴倫器具有良好的滤波效果，可用 以彌補濾波器之不足，使得所應用之通訊產品具有更好的 使用效能，故極具市場競爭力。 綜上所述，雖然本發明已以較佳實施例揭露如上然 201012059l w^ui^rA terminal impedance R4A and load terminal impedance R5A are electrically connected for simulation. One end of the input terminal impedance R4A is coupled to the first end mA, and the other end of the input end impedance R4A is grounded. One end E6A of the third inductive element L3A and the other end E7A of the fourth inductive element L4 A are connected to both ends of the load terminal impedance R5a. Please refer to the 13th @, which shows the simulation results of the insertion loss of the analog circuit of the balun in accordance with Fig. 6 and Fig. 12. Curve 114 corresponds to Figure 6, and curve 118 corresponds to Figure 12. The insertion loss (4) 118 of the balun i 〇〇 A has a zero point near the frequency 5.7 GHz so that the attenuation rate of the stop band near the zero point is greater than the attenuation rate of the stop band of the curve 116. Further, the frequency of the zero point can be adjusted by adjusting the inductance values of the third inductance element L3 and the fourth inductance element L4 described above in the balun 100A. Please refer to 帛14®, which illustrates a further embodiment of the inspector of the present invention. Different from Fig. 1, the balun device further includes a fourth inductance element L4B and a fifth inductance element L5B. The fourth inductance element 14b is connected in series with the second capacitance element C2, and the terminal of the fourth inductance element (10) is grounded. The fifth inductance element L5B is connected in series with the third capacitance element C3, and the end E7B of the fifth inductance element L5B is grounded. If the third inductor 7G and the fourth inductor L4B of the embodiment are different, two zero points at different frequencies can be generated in the frequency response diagram of the insertion loss. The balun device of the invention has good filtering effect, can increase the attenuation rate of the barring device, and has a good filtering effect, which can be used to compensate for the shortage of the filter, so that the applied communication product has more Good use of performance, so it is highly competitive in the market. In summary, although the present invention has been disclosed in the preferred embodiment as above, 201012059
I , X ?» «/\7 XTX 其並非用以限定本發明。本發明所屬技術領域中具有通常 知識者，在不脫離本發明之精神和範圍内，當可作各種之 更動與潤飾。因此，本發明之保護範圍當視後附之申請專 利範圍所界定者為準。 【圖式簡單說明】 第1圖繪示乃依照本發明之一實施例之巴倫器之電 路圖。 0 第2圖繪示第1圖之巴倫器於差模時之模擬電路圖。 第3圖繪示第2圖之第一輸出訊號與第二輸出訊號之 振幅差的模擬結果圖。 第4圖繪示第2圖之第一輸出訊號與第二輸出訊號之 相位差的模擬結果圖。 第5圖繪示第1圖之巴倫器於共模時之模擬電路圖。 第6圖繪示將第1圖之巴倫器之第三電感元件L3移 除後於共模時之模擬電路圖。 丨第7圖繪示依照第5圖及第6圖之巴倫器之模擬電路 之插入損失的模擬結果圖。 第8圖繪示乃本發明之巴倫器之另一實施例之電路 圖。 第9圖繪示第8圖之巴倫器於差模時之模擬電路圖。 第10圖繪示第9圖之第一輸出訊號與第二輸出訊號 之振幅差的模擬結果圖。 第11圖繪示第9圖之第一輸出訊號與第二輸出訊號 之相位差的模擬結果圖。 11 201012059I, X ?» «/\7 XTX It is not intended to limit the invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram of a balun in accordance with an embodiment of the present invention. 0 Figure 2 shows the analog circuit diagram of the balun of Figure 1 in the differential mode. Fig. 3 is a graph showing a simulation result of the amplitude difference between the first output signal and the second output signal in Fig. 2. Fig. 4 is a graph showing a simulation result of the phase difference between the first output signal and the second output signal in Fig. 2. Figure 5 is a schematic diagram showing the analog circuit of the balun of Figure 1 in common mode. Fig. 6 is a diagram showing an analog circuit diagram of the third inductance element L3 of the balun of Fig. 1 after being removed in the common mode. Fig. 7 is a graph showing the simulation result of the insertion loss of the analog circuit of the balun according to Figs. 5 and 6. Figure 8 is a circuit diagram showing another embodiment of the balun of the present invention. Fig. 9 is a diagram showing an analog circuit diagram of the balun of Fig. 8 in the differential mode. Fig. 10 is a graph showing a simulation result of the amplitude difference between the first output signal and the second output signal in Fig. 9. Figure 11 is a graph showing the simulation results of the phase difference between the first output signal and the second output signal in Figure 9. 11 201012059
1 W^U14FA 第12圖繪示第9圖之巴倫器於共模時之模擬電路圖。 第13圖繪示依照第6圖及第12圖之巴倫器之模擬電 路之插入損失的模擬結果圖。 第14圖繪示乃本發明之巴倫器之更另一實施例之電 路圖。 【主要元件符號說明】 100、100A、100B :巴倫器 LI、L1A :第一電感元件 L2、L2A :第二電感元件 L3、L3A :第三電感元件 L4B :第四電感元件 L5B :第五電感元件1 W^U14FA Figure 12 shows the analog circuit diagram of the balun of Figure 9 in common mode. Figure 13 is a graph showing the simulation results of the insertion loss of the analog circuit of the balun according to Figs. 6 and 12. Figure 14 is a circuit diagram showing still another embodiment of the balun of the present invention. [Main component symbol description] 100, 100A, 100B: balun LI, L1A: first inductance element L2, L2A: second inductance element L3, L3A: third inductance element L4B: fourth inductance element L5B: fifth inductance element
Cl、CIA、C1B :第一電容元件 C2、C2A、C2B :第二電容元件 C3、C3A、C3B :第三電容元件Cl, CIA, C1B: first capacitive element C2, C2A, C2B: second capacitive element C3, C3A, C3B: third capacitive element
Rl、R1A、R4、R4A :輸入端阻抗 R2、R2A、R3、R3A、R5、R5A :負載端阻抗 12Rl, R1A, R4, R4A: Input impedance R2, R2A, R3, R3A, R5, R5A: Load impedance 12