ZENER_CONTROLS_BRIDGE

Published:2009/7/5 23:00:00 Author:May | From:SeekIC

Amplitude of 10.5-kHz Wien-bridge oscillator outputis main-tained symmetrical above ground by using single zener with diode bridge，As output e0 approaches soft knee threshold of conduction for zener.its impedance decreases and shunts R2，This violates oscillator requirement that R2=2R1. so output begins decreasing sinusoidally. As swing decreases, gain increases until e0 reaches negative threshold. Signal then reverses and again starts going positive.-W. B Crittenden and E. J. Owings, Jr., Zener-Diode Controls Wien-Bridge Oscillator, EDN Magazine. Aug. 1. 1972. p 57-58.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/ZENER_CONTROLS_BRIDGE.html

Print this Page | Comments | Reading(3)