Method and apparatus for amplifying an analog low-frequency signal by a switching amplifier
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United States of America Patent
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Dec 11, 1984
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N/A
app pub date -
Jan 28, 1982
filing date -
Feb 16, 1981
priority date (Note) -
Expired
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Abstract
A method of amplifying an analog low-frequency signal, and a switching amplifier implementing the method, wherein the maximum amplifiable voltage of the analog input signal is divided up into as many voltage bands as there are switching stages provided in the switching amplifier, and one switching stage is associated with each voltage band. Thereby the number of switching stages actuated and their switched-on period may be modulated in dependence upon the amplitude. In this way it is possible to reduce considerably the total number of switching processes during one period of the low-frequency input signal and the losses connected with each switching process.
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