Amplifier with compressor and expander function for ground symmetrical electrical signals
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United States of America Patent
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Jul 19, 1988
Grant Date -
N/A
app pub date -
Jul 17, 1986
filing date -
Jul 18, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An amplifier for ground symmetrical signals includes a compressor at the input and an expander at the output, with the slope of at least one of its expansion or compression characteristics being adjustable for at least one half-wave polarity with the aid of an adjustment voltage. In order to reduce second order distortions at the amplifier output, a circuit is provided for determining the arithmetic mean value of the voltage across the amplifier output. A control value is produced from the determined mean value and the slope of the expansion or compression characteristic is regulated with this control value in the opposite direction so that the distortions are reduced.
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Patent Citation Ranking
- 2 Citation Count
- H03F Class
- 0 % this patent is cited more than
- 37 Age