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

    How to Make a 25 Amp 1500 watts Heater Controller Circuit
    Methods of Monitoring Fan Performance
    2002 Chevy Cavalier heater/AC temp control wont light up at nite
    TRANSISTORIZED THYRATRON RING COUNTER
    High pressure natural gas shutoff valve drive circuit diagram



    Top