有源模擬濾波器的快速協(xié)同設(shè)計(jì)方法

　　為了解決有源模擬濾波器傳遞特性函數(shù)設(shè)計(jì)中手工計(jì)算方法復(fù)雜、時(shí)間長(zhǎng)，查表法精度不高的問(wèn)題，提出了一種快速協(xié)同設(shè)計(jì)方法，該方法先通過(guò)在MATLAB環(huán)境下將基于頻率變換的有源模擬濾波器傳遞函數(shù)設(shè)計(jì)方法程序化，之后只需給出濾波器電壓衰減設(shè)計(jì)指標(biāo)和邊界頻率即可快速獲得濾波器傳遞函數(shù)或其二階級(jí)聯(lián)傳遞函數(shù)中各多項(xiàng)式的系數(shù)并在此基礎(chǔ)上進(jìn)行電路綜合，大大縮短了設(shè)計(jì)時(shí)間，最后通過(guò)EDA工具Pspice對(duì)其綜合的電路進(jìn)行性能指標(biāo)的仿真，進(jìn)一步驗(yàn)證和完善設(shè)計(jì)方案，為電路實(shí)現(xiàn)的可行性提供了可靠的保障。仿真實(shí)驗(yàn)結(jié)果表明協(xié)同設(shè)計(jì)方法快速、直觀、準(zhǔn)確，大大提高了設(shè)計(jì)效率，對(duì)有源模擬濾波器特別是高階濾波器的設(shè)計(jì)具有很好的實(shí)際指導(dǎo)意義。

　　Abstract:

　　In order to solve the problems in the design of transfer function for active analog filter， such as long time and tedious manual calculation and low precision table look-up， a kind of rapid collaborative design method for active analog filter is proposed. First， transfer function design based on frequency transform is programmed in MATLAB， then coefficients of transfer function or second order cascade transfer function are given rapidly according to the voltage attenuation index and edge frequency based on MATLAB program. With the above results， it can greatly shorten the time of circuit synthesis. Finally，the filter circuit performance simulation is presented through EDA/Pspice，which furtherly verifies and improves the design. All of these provide a reliable guarantee to the feasibility of circuit realization. The simulation results show that the collaborative design method is fast，intuitionistic and accurate， it also enhances the design efficiency greatly. This method plays a practical introductive significance on active analog filter?蒺s design especially for high order filter design.