CASSETTE_RECORD_PLAYBACK

Published:2009/7/14 7:42:00 Author:May | From:SeekIC

National LM389 power amplifier chip includes three NPN transistors, to provide all circuits needed for complete recording and playback of cassette tapes. Two of internal transistors act as signal amplifiers while third is used for automatic level contra when recording. Diode is also on chip.- Audio Handbook, National Semiconductor, Santa Clara, CA, 1977, p 4-33-4-37.



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