TRANSIENT_ELIMINATOR

Published:2009/7/13 0:06:00 Author:May | From:SeekIC

Used between DC power supply and load to eliminate supply transients that might damage semiconductor devices. Zener rating should be about 10% higher than supply voltage so Q1 is normally turned off. Q2 is normally conducting. When voltage spike is present on input line, zener conducts and turns Q1 on. Q1 then places positive bias on 10K pot to turn off Q2 and protect load during transient.-J. Fisk, Circuits and Techniques, Ham Radio, June 1976, p 48-52.



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