RECTIFIER_WITHOUT_DC_OFFSET

Published:2009/7/2 22:11:00 Author:May | From:SeekIC

Avoids drawback ofJarge nonlinearity at low signal levels. by isolating AC of opamp from DC output.Circuit has wide bandwidth, as required for rectifying 20-kHz input signal with high precision, Output coupling capacitor C3 is low-Ieakage Mylar; for low-frequency operation. it can be replaced with two back-to-back low-leakage tantalums. D1 and D2 should be matched for forward voltage at peak load current. Use Hewlett-Packard 5082-2810 hot-carrier diodes instead to improve operation at millivolt signal levels or at higher frequencies.-D. Belanger. Single Op Amp Full-Wave Rectifier Has No DC Offset. EDN Magazine. April 5. 1977. p 144 and 146.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/RECTIFIER_WITHOUT_DC_OFFSET.html

Print this Page | Comments | Reading(3)