论文部分内容阅读
全电阻有源滤波器,不用外接电容,其特性参数由电阻比值来确定,工作频率高,极点灵敏度低。采用两个运算放大器和六个电阻可以构成一节双二阶全电阻有源滤波器(BIQUAD R ACTIVE FILTER),电路如图1所示。从电路的不同端钮上可获得各自的传输特性。于是,可构成低通(LOWPASS)、带通(BANDPASS)、有零点低通(或称低通带阻LOWPASS BANDREJECT)、高通(HIGHPASS)、带阻(或称陷波器 NOTCH)和移相(或称全通ALLPASS)等六种有源滤波器。如果把图1中的外接电阻和运算放大器一起集成化,则可构成集成滤波
All-resistance active filter, no external capacitors, the characteristic parameters determined by the resistance ratio, high frequency, low pole sensitivity. The use of two operational amplifiers and six resistors can form a bi-second full-impedance active filter (BIQUAD R ACTIVE FILTER), the circuit shown in Figure 1. From the different end of the circuit button to get their own transmission characteristics. Thus, it can form LOWPASS, BANDPASS, LOWPASS BANDREJECT, HIGHPASS, NOTCH, and phase shift Or all-pass ALLPASS) and other six kinds of active filters. If the external resistor in Figure 1 and op-amp together, you can form an integrated filter