用B-LB46芯片构成的陷波器

Bandrejection Filter Using BLB46 Chip

介绍了用北京半导体器件一厂的新产品ＢＬＢ４６芯片构成的陷波器。通过逐级运算推出高通滤波函数和低通滤波函数，并在此基础上通过四级运放的适当组合构成带阻滤波函数；并用实例介绍了构成陷波器的具体方法。ＢＬＢ４６芯片是由四级精密运算放大器组成的有源滤波模块。

The bandrejection filter formed by BLB46 chip which produced by Beijing First Semiconductor Device Factouy is introduced. This kind of chip is an active filter module with a fourstage precision operational amplifier. Highpass filter function and lowpass filter function are deduced by calculating step by step. Thus, bandrejection filter function is implemented by fourstage operational amplifier combination in suitable form. Finally the detail means of forming bandrejection filter is described by a practical example.