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为了解决有源窄带滤波器单频选择性差、选频网络复杂等问题,我们参考有关资料,试制成了一套多通道有源窄带滤波器.其特点是:频率选择性能好,品质因数Q值及中心频率可调,体积小,电路及网络非常简单.这种窄带滤波器对于设计多通道遥控遥测设备带来了方便.基本电路如图1所示,它由运算放大器A,调谐选频网络C_1、C_2、R_1、R_2和Q值调节网络WR_3三部分组成.从电路形式上看,它
In order to solve the problems of poor selectivity of single-frequency and complex frequency-selecting network of active narrow-band filter, we make a set of multi-channel active narrow-band filter with reference to relevant data, which is characterized by good frequency selectivity and quality factor Q Adjustable value and center frequency, small size, circuit and network is very simple.This narrow-band filter for the design of multi-channel remote telemetry equipment has brought the convenience of the basic circuit shown in Figure 1, which consists of op amp A, tuning frequency selection Network C_1, C_2, R_1, R_2 and Q value adjustment network WR_3 composed of three parts.From the circuit form, it