有源C帶阻濾波器
AN ACTIVE C NOTCH FILTER
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摘要: 本文提出了一種新的由兩個(gè)運(yùn)放、五個(gè)電容組成的有源C帶阻濾波器,該濾波器能實(shí)現(xiàn)低通、低通帶阻、帶通、對(duì)稱帶阻網(wǎng)絡(luò)功能,其極點(diǎn)參數(shù)0和Q可以獨(dú)立調(diào)整。文中不但給出了實(shí)驗(yàn)結(jié)果和計(jì)算實(shí)例,還分析了在0點(diǎn)衰減為有限值的原因。
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關(guān)鍵詞:
- 濾波器; 有源濾波器; 有源C帶阻濾波器
Abstract: A new active C notch filter circuit with two operational amplifiers and five capacitors is presented. The circuit can fulfil the second-order lowpass, band-pass, band-stop and symmetrical band-stop functions. Its pole parameters Q and (0 can be adjusted independently. Design examples and experimental results are given. It is investigated why the attenuation is not infinite at notch frequency 0. -
R. Schaumann, J.R. Brand, Proc IEE. Part G; 128(1981), 19-24.[2]石田,村岡等,電子通信學(xué)會(huì)論文志,J68-A(11), 1985,1269-1270.[3]趙述江,電子學(xué)報(bào),1984年,第1期,第64-70頁.[4]石田,副井等,電子通信學(xué)會(huì)論文志,J68-A(7), 1985,700-701. -
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