200822549 九、發明說明： _【發明所屬之技術領域】 本發明係為一種可調式傳輸零點之低雜訊高增益 主動式濾、波器，尤指具備可抑制干擾信號及可調式突 波信號抑制功能者，適用於無線通訊領域。 【先前技術】 如美國專利第6850747號之「鏡像抑止濾波器 (Image trap filter)」，一種鏡像抑止濾、波器係置於一低 雜訊放大器與一無線電頻率接收器之混波器（The mixer of a radio frequency receiver)間，並具備可微調 之突波抑制機制，但使用了許多主、被動元件，此結 構將增加電路佈局複雜度並增加電路使用面積，且此 電路並未整合濾波器與信號放大器之功能。 另，如美國專利第6681103號之「On-chip image reject filter」，此篇專利係揭露以傳統之低雜訊放大器 整合成一鏡像去除遽波器（image reject filter)，並用於 超外差接收器（superheterodyne receiver)之前端，以及 美國專利第6873212號之「具有陷波濾波器之積體電 路無線電頻率放大器（INTEGRATED CIRCUIT RADIO FREQUENCY AMPLIFIER WITH NOTCH FILTER)」， 其為一種積體電路超外差無線電接收器係包含一具放 大器耦合之陷波濾波器，用以放大無線電頻率訊號。 200822549 【發明内容】 本發明之主要目的係在於，且 頻之干擾信號及可調式突波信號抑制功能，：達二 ::傳：零點、可調式增益、提供低雜訊信號放大及 抗裝程漂移等功效，且適用於單晶片系統整合。 ·、、’、上述之目的，本發明係—種可調式傳輸零點 ，㈣訊高增益主動式m ’本發明之主動式滤波 器係至少由一濾波模組、一增益放大模組、一可調式 匹配網路模組及一增益控制模組所構成。 【實施方式】 請參閱『第1圖』所示，係本發明實施例之電路 結構示意圖。如圖所示：本發明係為一種可調式傳輸 零點之低雜訊南增益主動式滤波器，本發明之主動式 濾波器1係至少由一濾波模組1 1、一增益放大模組 1 2、一可調式匹配網路模組1 3及一增益控制模組 1 4所構成。 上述之濾波模組1 1係包含一訊號輸入端1丄 1，其另一端係連接地電極，該濾波模組1 1係用以 200822549 抑止低頻突波信號進入電路，避免造成電路飽合。 上述之增益放大模組1 2係至少包含一第一電—晶 體1 2 1及一閘極電壓端1 2 2，並形成一共閘極放 大器，且與上述之濾波模組1 1連接，而該增益放大 模組1 2係用以將低雜訊信號放大，並可降低電路受 製程及溫度漂移所造成之影響，其中，該第一電晶體 1 2 1係選自場效應電晶體、雙極性接面電晶體及主 動元件中擇其一。 上述之可調式匹配網路模組i 3 —端係與上述增 益放大模組1 2疊接，其另一端係與上述之增益控制 模組1 4疊接，然而該增益放大模組1 2及增益控制 模組1 4係皆為共閘極放大器，所以該可調式匹配網 路模組1 3係設於兩共閘極放大器間，並用以提高電 路之增益及降低電路之雜訊指數，另更可提供可調式 犬波抑制之功能，其中該可調式匹配網路模組1 3可 、由可調式電容與可調式電感所構成。 上述之增益控制模組1 4係為共閘極放大器，係 至〉、包含一第二電晶體1 4 1及一電壓控制端1 4 2所以可於電壓控制端1 4 2輸入一電壓增壓電路 之操作動態範圍，而該第二電晶體丄4 i之一端係連 接一供應電壓端1 5，而該第二電晶體i 4 i與供應 電壓端1 5間設有一訊號輸出端丄6。如是，藉由上 述構成一全新之可調式傳輸零點之低雜訊高增益主動 200822549 式濾波器。 請參閱『第2及3圖』所示，係本發明之s參數 曲線圖及本發明之雜訊指數曲線圖。如圖所示：於第 2圖中係包含一第一增益曲線2 1、一 input return loss 曲線 2 2 及一 output return loss 曲線 2 3 ,當輸 入訊號於頻率15GHz至20GHz之間時，訊號會被放 大，當輸入訊號頻率不在上述範圍時，訊號會被抑止， 另由第3圖之第一雜訊指數曲線31，可知本發明之 雜訊指數特性。 请參閱『第4圖』所示，係本發明之可調增益範 圍曲線圖。如圖所示：包含一第二增益曲線4 1，當 於該增益控制模組之電壓控制端輸入電壓，隨電壓值 增加，本發明之操作動態範圍亦可增加。 明參閱『第5圖』所示，係本發明之串接兩級主 動式遽波器之第—s參數與雜訊指數曲線圖。如圖所 ^ ^ 3第二增益曲線5 1、一第四增益曲線52、 一第二雜訊曲線5 3及一第三雜訊曲線5 4，由此可 二！接兩個單級主動式濾波器時，兩主動式濾波器 之傳輸零點係、可設於同—頻率下，提供窄頻之效果。 .,.^ ^第6圖』所示，係本發明之串接兩級主 一，^L器之第二8參數與雜訊指數曲線圖。如圖所 一第四Ι&α第五增益曲線6 i、一第六增益曲線6 2、 ’汛曲線6 3及一第五雜訊曲線6 4，由此可 200822549 兩主動式濾波器 之傳輸零點時 細上所述，本發明 益主動式滹㈣叮“式傳輸零點之低雜訊高增 抑制善習用之種種缺點，具備可 r，二:丨氏頻之干擾信號及可調式突波信號抑制功 =並，可調式傳輸零點、可調式增益、提供低雜 ”及抗製程漂移，且適用於單晶片系統整 I’而整體電路架構簡單，❹元件較少，進而使本 =明之産生能更進步、更實用、更符合錢者之所須， 確已符合發明專利中請之要件，爰依法提出專利申請。 ^惟以上所述者，僅為本發明之較佳實施例而已， 當不能以此限定本發明實施之範圍；故，凡依本發明 申請專利範圍及發明說明書内容所作之簡單的等效變 化與修飾，皆應仍屬本發明專利涵蓋之範圍内。 200822549 【圖式簡單說明】 第1圖’係本發明實施例之電垮結構示意圖。 第2圖’係本發明之s參數曲線圖。 第3圖’係本發明之雜訊指數曲線圖。 第4圖，係本發明之可調增益範圍曲線圖。 第5圖，係本發明之串接兩級主動式濾波器之第一 s 參數與雜訊指數曲線圖。 第6圖，係本發明之串接兩級主動式濾波器之第二s 參數與雜訊指數曲線圖。 【主要元件符號說明】 主動式濾波器1 濾、波模組1 1 訊號輸入端111 增益放大模組12 第一電晶體1 2 1 閘極電壓端1 2 2 可調式匹配網路模組13 增益控制模組1 4 第二電晶體1 4 1 電壓控制端1 4 2 供應電壓端1 5 200822549 訊號輸出端16 第一增益曲線2 1 - input return loss 曲線 2 2 output return loss 曲線 2 3 第一雜訊指數曲線3 1 第二增益曲線41 第三增益曲線5 1 第四增益曲線5 2 第二雜訊指數曲線5 3 第三雜訊指數曲線5 4 第五增益曲線61 第六增益曲線6 2 第四雜訊指數曲線6 3 第五雜訊指數曲線6 4200822549 IX. Description of the invention: _ [Technical field of invention] The present invention is a low-noise high-gain active filter and wave filter with adjustable transmission zero point, especially with suppressing interference signal and adjustable glitch signal suppression Functional, suitable for wireless communications. [Prior Art] As shown in U.S. Patent No. 6,850,747, "Image trap filter", an image suppression filter is placed in a mixer of a low noise amplifier and a radio frequency receiver (The Mixer of a radio frequency receiver) with fine-tuning surge suppression mechanism, but using many active and passive components, this structure will increase circuit layout complexity and increase circuit area, and this circuit does not integrate filters With the function of the signal amplifier. In addition, as described in the "On-chip image reject filter" of U.S. Patent No. 6,681,103, this patent discloses the integration of a conventional low noise amplifier into an image reject filter and used for a superheterodyne receiver. (superheterodyne receiver) front end, and "INTEGRATED CIRCUIT RADIO FREQUENCY AMPLIFIER WITH NOTCH FILTER", which is an integrated circuit superheterodyne radio reception. The device includes a notch filter coupled by an amplifier to amplify the radio frequency signal. 200822549 SUMMARY OF THE INVENTION The main object of the present invention is to provide a frequency interference signal and an adjustable surge signal suppression function, which are: two:: transmission: zero point, adjustable gain, low noise signal amplification, and anti-load drift Equivalent and suitable for single-chip system integration. ·,, ', the purpose of the above, the present invention is an adjustable transmission zero point, (4) the signal high gain active m 'the active filter of the present invention is at least a filter module, a gain amplification module, The modulation matching network module and a gain control module are formed. [Embodiment] Please refer to Fig. 1 for a schematic diagram of the circuit structure of an embodiment of the present invention. As shown in the figure, the present invention is a low noise south gain active filter with adjustable transmission zero point. The active filter 1 of the present invention is composed of at least a filter module 1 1 and a gain amplifying module 1 2 . An adjustable matching network module 13 and a gain control module 14 are formed. The filter module 1 1 includes a signal input terminal 1 丄 1 and the other end of which is connected to the ground electrode. The filter module 1 1 is used for 200822549 to suppress the low frequency glitch signal from entering the circuit to avoid circuit saturation. The gain amplification module 1 2 includes at least a first electro-optical crystal 1 1 1 and a gate voltage terminal 1 2 2, and forms a common gate amplifier, and is connected to the filter module 11 described above, and the The gain amplifying module 12 is used for amplifying the low noise signal and reducing the influence of the circuit and the temperature drift, wherein the first transistor 1 2 1 is selected from the field effect transistor, bipolar Choose one of the junction transistor and the active component. The adjustable matching network module i 3 - the end is overlapped with the gain amplifying module 1 2 , and the other end is overlapped with the gain control module 14 , but the gain amplifying module 1 2 The gain control module 14 is a common gate amplifier, so the adjustable matching network module 13 is disposed between the two common gate amplifiers, and is used to increase the gain of the circuit and reduce the noise index of the circuit. The adjustable dog wave suppression function can be provided, wherein the adjustable matching network module 13 can be composed of a tunable capacitor and a tunable inductor. The gain control module 14 is a common gate amplifier, and includes a second transistor 1 4 1 and a voltage control terminal 1 4 2 so that a voltage boost can be input at the voltage control terminal 14 2 The operating dynamic range of the circuit, and one end of the second transistor i4 i is connected to a supply voltage terminal 15 , and a signal output terminal 丄 6 is disposed between the second transistor i 4 i and the supply voltage terminal 15 . If so, the low-noise high-gain active 200822549 filter that constitutes a new adjustable transmission zero is described above. Please refer to the "Sections 2 and 3" for the s-parameter graph of the present invention and the noise index graph of the present invention. As shown in the figure: in Fig. 2, a first gain curve 2 1 , an input return loss curve 2 2 and an output return loss curve 2 3 are included. When the input signal is between 15 GHz and 20 GHz, the signal will be When amplified, when the input signal frequency is out of the above range, the signal is suppressed, and the first noise index curve 31 of Fig. 3 is used to know the noise index characteristic of the present invention. Please refer to Figure 4 for an adjustable gain range graph of the present invention. As shown in the figure, the second gain curve 4 is included. When the voltage is input to the voltage control terminal of the gain control module, the operating dynamic range of the present invention may also increase as the voltage value increases. Referring to FIG. 5, it is a graph of the first-s parameter and the noise index of the serial two-stage active chopper of the present invention. As shown in the figure, the second gain curve 5 1 , a fourth gain curve 52 , a second noise curve 5 3 and a third noise curve 5 4 can be used as follows! When two single-stage active filters are connected, the transmission zero point of the two active filters can be set at the same frequency to provide a narrow frequency effect. Fig. 6 is a diagram showing the second 8 parameters and the noise index of the two-stage main unit of the present invention. As shown in the figure, a fourth Ι & a fifth gain curve 6 i , a sixth gain curve 6 2 , a '汛 curve 6 3 and a fifth noise curve 6 4 , thereby transmitting the two active filters of 200822549 As described in detail at zero point, the present invention has the disadvantages of low-noise high-intensity suppression and good use of the transmission type zero point, and has the interference signal of r, two: 丨 频 frequency and the adjustable glitch signal. Suppressing power = and, adjustable transmission zero, adjustable gain, low impurity and resistance to process drift, and suitable for single-chip system I's simple overall circuit structure, fewer components, and thus enable the production of this More progressive, more practical, and more in line with the needs of the money, it has indeed met the requirements of the invention patent, and filed a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes made in accordance with the scope of the present invention and the contents of the description of the invention are Modifications are still within the scope of the invention. 200822549 [Simplified description of the drawings] Fig. 1 is a schematic view showing the structure of an electric raft according to an embodiment of the present invention. Fig. 2 is a graph of the s parameter of the present invention. Figure 3 is a graph of the noise index of the present invention. Figure 4 is a graph of the adjustable gain range of the present invention. Figure 5 is a graph showing the first s-parameter and noise index of the cascaded two-stage active filter of the present invention. Figure 6 is a graph showing the second s-parameter and noise index of the cascaded two-stage active filter of the present invention. [Main component symbol description] Active filter 1 Filter, wave module 1 1 Signal input terminal 111 Gain amplification module 12 First transistor 1 2 1 Gate voltage terminal 1 2 2 Adjustable matching network module 13 Gain Control module 1 4 Second transistor 1 4 1 Voltage control terminal 1 4 2 Supply voltage terminal 1 5 200822549 Signal output terminal 16 First gain curve 2 1 - input return loss Curve 2 2 output return loss Curve 2 3 First miscellaneous Exponential curve 3 1 second gain curve 41 third gain curve 5 1 fourth gain curve 5 2 second noise index curve 5 3 third noise index curve 5 4 fifth gain curve 61 sixth gain curve 6 2 Four noise index curve 6 3 fifth noise index curve 6 4