Transcription of 1 Audio Amplifiers 2 Buffer Amplifiers/Driving Cap Loads 3 ...
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SIGNAL Amplifiers H Op Amp History1 Op Amp Basics2 Specialty Amplifiers3 Using Op Amps with Data Converters4 Sensor Signal Conditioning5 Analog Filters 6 Signal Amplifiers1 Audio Amplifiers2 Buffer Amplifiers /Driving Cap Loads3 Video Amplifiers4 Communications Amplifiers5 Amplifier Ideas6 Composite Amplifiers7 Hardware and Housekeeping Techniques OP AMP APPLICATIONS SIGNAL Amplifiers Audio Amplifiers CHAPTER 6: SIGNAL Amplifiers Walt Jung, Walt Kester SECTION 6-1: Audio Amplifiers Walt Jung Audio Preamplifiers Audio signal preamplifiers (preamps) represent the low-level end of the dynamic range of practical Audio circuits using modern IC devices. In general, amplifying stages with input signal levels of 10mV or less fall into the preamp category.
Because of the single supply operation, input/output coupling is via polar capacitors, namely C1, C2, and C3. C4 is a noise filter, and C5 a bypass. For lowest noise in the circuit, the amplifier biasing must also be noiseless, that is free from noise added directly or indirectly by the biasing (see Reference 1).
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