Signal-track-and-hold


Posted on Aug 12, 2012

When the switch is closed or the FET is conducting, the circuit behaves as an inverting amplifier with a gain of R2/Rl. Since as the inverting tenninal of the op amp is a virtual ground, the capacitor is kept charged to the output voltage by the op amp. When the switch is opened and the FET is nonconducting, the voltage at the output is held constant by the capacitor, the current demands of the next stage are met by the op amp.


Signal-track-and-hold
Click here to download the full size of the above Circuit.

The value of C should be chosen so that its impedance at the operating frequency is large compared to Rl and R2.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Polarity converter
    Rf-modulator
    The Talking Compass Circuit
    Hook Sensor Loop Circuit
    Cmos Based Vehicle Anti-Theft Alarm
    Crystal pickup pre-amplifier circuit
    gic
    simple but reliable car battery tester
    Timer circuit
    Simple RS232 Serial Interface Circuit
    USB Live Oscilloscope: ADCV Board
    SDR TX 50MHz
    Rapid control circuit of a stepping motor



    Top