TRANSIENT_RESPONSE_OF_REGULATED_SUPPLlES

Published:2009/7/11 3:48:00 Author:May | From:SeekIC

Developed for testing transient response of 12-V regulated power supply at loading of either 100 mA or 1 A,depending on switch position. Load resistors ean be changed for other voltages and currents. Transients generated by supply may be observed on AC-coupled oscilloscope. Good transient response will show only small leading-edge peaks, as in upper waveform. Any tendency of power supply toward instability degrades waveform much more, as in lower diagram. Circuit consists of multivibrator using series diodes in base circuits to protect transistors from excessive voltage swings in switching cycle. Square-wave output is used for oscilloscope trigger and fed to other three transistors that provide load for power supply under tesl.-H. Macdonald, Transient Response Testing, Wireless World, July 1973, p 338.



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