Open-Loop Peak Detector Circuit

Posted on Oct 5, 2012

In this open-loop design, the detector diode is Dl, and a level shifting or compensating diode is D2. Load resistor RL is connected to -5 V, and an identical bias resistor RL is connected to -5 V, and identical bias resistor RB is used to bias the compensating diode. Resistors with equal values ensure that the diode drops are equal. Low values of RL and RB (1 kU to 10 kf2) provide fast response, but at the expense of poor low-frequency accuracy. High values of RL and Rn provide good low-frequency accuracy, but cause the amplifier to slew rate limit, resulting in poor high-frequency accuracy.

Open-Loop Peak Detector Circuit
Click here to download the full size of the above Circuit.

A good compromise can be made by adding a feedback capacitor CFB, which enhances the negative slew rate on the (-) input.

Leave Comment

characters left:

New Circuits



Popular Circuits

Audio sine-wave generator
Low Voltage Step-Down Converter
Electro harmonix graphic equalizer circuit
Voltage follower circuit
GPS reference clock NTP server with Gentoo
SPI Interface Big 7-Seg LED
Two-phase stepper motor drive system circuit