PRECISION RECTIFIER


Posted on Feb 6, 2014

Used in digital voltmeters to convert AC waveform to full-waverectified DC equivalent. First 3130 opamp is used as polarity separator, with negative-going signals appearing across upper 10K resistor and positive-going signals across lower 10K resistor. Output of opamp exceeds these voltage drops by exactly diode voltage drop. Second opamp stage re


PRECISION RECTIFIER
Click here to download the full size of the above Circuit.

combines positive and negative peaks. 5K trimming pot is adjusted so both peaks are equal height. Output of second opamp is negative-going full-wave replica of input signal. After filtering, output is average DC value in range from 0 to -1. 5 V for 0-3 V P-P input. -D. Lancaster, "CMOS Cookbook, " Howard VV. Sams, Indianapolis, IN, 1977, p 345-346.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Variable Square wave oscilator with 555 circuit
    Telephone Visual Ring Indicator
    Michael J. Rainey: July 2011
    pendulum controlled clock
    Dancing light
    Contrast Control for LCDs
    230 V 50Hz AC (or 110V 60Hz) Main Operated LED Powerful NIGHT LAMPCircuit
    Quality Stereo Wireless Microphone or Audio Link
    Using AC for LED Christmas Lights
    interfacing rs 232 with spartan 6 fpga
    BE-150 mainframe computer switching power supply circuit
    Binary counter circuit diagram



    Top