Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Patent
1998-03-27
2000-11-07
Shingleton, Michael B
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
330 69, 330146, H03F 330
Patent
active
061442585
ABSTRACT:
There is provided an audio power amplifier having an output DC isolated from ground between two capacitors which are connected in series across a bias potential. The bias potential may be generated from common AC line currents by a simple bridge rectifier without the need for a bulky power supply transformer. The amplifier is DC isolated from the input signal, and hence from ground, by a balun or other small-signal transformer. Feedback is provided to compensate for ripple appearing on the bias potential.
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Jacob Millman, "Microelectronics: Digital and Analog Circuits and Systems," McGraw-Hill, Inc., N.Y., 1979, pp. 359 and 672.
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