Sensitive envelope detector circuit diagram

Posted on Feb 6, 2014

This is a very sensitive envelope detector for AM radio. The circuit (see Fig. 1) provides linear detection of weak signals with modulation depth of 80. 85% The first stage (VT1) is a common-emitter amplifier circuit for input signals, the second stage is an emitter-follower circuit (VT2). The transistor VT2 operates at low current because of the hi

Sensitive envelope detector circuit diagram
Click here to download the full size of the above Circuit.

gh resistance of the resistor R5. The process of AM demodulation occurs at the lower bend of the volt-ampere curve. A high linearity of demodulation provided by the deep negative feedback in the emitter-follower circuit.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Electronic fuse circuit
    Car Headlight Control
    Universal Compander
    Gene Cafe Dimmer Control Mod
    ypbpr to rgb video converter circuit
    how to make inexpensive current
    doubler voltage with ne555 schematic
    audio sine wave generator
    Buick LeSabre
    Based on AT89C52 minimum system interface circuit
    Guitar noise circuit diagram