HI_FI_COMPRESSOR

Published:2009/6/29 22:28:00 Author:May | From:SeekIC

One section of Signetics NE570 dual compandor is used with extemal opamp for compression of large input signals in high-fidelity audio system. To prevent overload by sudden loud signal when compressor is operating at high gain for small signals, bruteforce clamp diodes D3 and D4 limit output swings to about 7V P-P, Limiting action prevents overloading of succeeding circuit such as tape recorder. Circuit includes input compensation network required for stability. Corresponding expander used for playback of recorded material should have same value for rectifier capacitor C9 as is used in compressor.- SignetIcs Analog Data Manual, SignetIcs, Sunnyvale, CA, 1977, p 804.



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