RAZOR SHARP CW FILTER


Posted on Feb 6, 2014

The circuit consists of four stages of active bandpass ftltering provided by two type A747 integrated-circuit dual op amps and includes a simple threshold detector (diodes D1 and D2) between stages 2 and 3 to reduce low-level background noise. Each of the four filter stages acts as a narrow bandpass ftlter with an audio bandpass centered at 750 H


RAZOR SHARP CW FILTER
Click here to download the full size of the above Circuit.

z. The actual measured 3-dB bandwidth is only 80 Hz wide.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Digital 5V Power Supply using L296
    H-bridge circuit using NPN transistors
    Loudspeaker Protector Monitors Current Circuit
    lamp flasher using ic lm395
    Chager circuit for SMF batteries
    Connection Testers
    LED current limiter accepts ac or dc
    5 volts 3A Dc DC converter circuit design project using LTC3113 IC
    A Scriptable Thermometer
    Automatic telephone call recording circuit



    Top