Closed-Loop Peak Detector Circuit


Posted on Nov 23, 2012

This closed-loop peak detector circuit uses a Schottky diode inside feedback loop to obtain good accuracy. The 20- resistance RQ isolates the 0.01- load and prevents oscillation. The dc value is read with a DVM. At a low frequency, the error is small and dominated by the decay of the detector capacitor between cycles. As the frequency rises, the error increases because capacitor charging time decreases. During this time, the overdrive becomes a very small portion of a sine-wave cycle.


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

Finally, at approximately 4 MHz, the error rises rapidly because of the slew- rate limitation of the op amp.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Switch Debouncer With Auto Repeat
Condenser Pre Amplifier LM 1458
tesla tc plans
laser door alarm circuit
relay driver board project
1w btl audio amplifier
Basic UPS Power Supplys
Fox Hunting
Battery Tesla Switch 720 Watt Mosfet Circuits



Top