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有源濾波器

集成有源濾波器的特點

發布日期:2022-10-09 點擊率:205

 

     集成有源濾波器與其他濾波器相比,具有以下優點:
  ①在制作截止頻率或中心頻率較低的濾波器時,可以做到體積小、重量輕、成本低;
  ②無須阻抗匹配;
  ③可方便地制作截止頻率或中心頻率連續可調的濾波器;
  ④由于采用集成電路,所以受環境條件(如機械振動、溫度、濕度、化學因素等)的影日向小;
  ⑤受電磁干擾的影響小;
  ⑥在實現濾波的同時,可以得到一定的增益,如低通濾波器的增益可達到40dB;
  ⑦如果使用電位器、可變電容器等,可使濾波器的精度達到0.5%;
  ⑧由于采用集成電路,可避免各濾波節之間的負載效應而使濾波器的設計和計算大大簡
  但是,集成有源濾波器也有缺點,如:集成電路在工作時,需要配備電源電路;由于受集成運放的限制,在高頻段時,濾波特性不好,所以一般頻率在100kHz以下時使用集成有源濾波器,頻率再高時,使用其他濾波器。

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