The application of microminiature and miniature operational amplifiers to audio systems is presented with practical examples. Application considered are the Microphone-Disc-Tape Preamplifiers, Mixers, Line Amplifiers, Disc and Tape Equalization, Bias and Erase Oscillators, Que and Tone Latching Detector, Graphic Equalizer, Low-Pass-Band-Pass-High-Pass Filters, Power Amplifier, Power Supplies and other circuits are described.
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