Class AB amplifier allowing quiescent current and gain to be set independently
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United States of America Patent
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Apr 30, 1996
Grant Date -
N/A
app pub date -
Nov 22, 1994
filing date -
Nov 22, 1994
priority date (Note) -
Expired
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Abstract
Topologies for Class AB amplifiers which have reduced quiescent power consumption are disclosed. An exemplary amplifier according to the present invention comprises two transconductance amplifying cells, each having an output transistor. Each output transistor is biased such that it conducts a small quiescent current which is preferably sufficient in magnitude to reduce amplifier distortion. The class AB amplifiers are well suited for low power supply voltage applications, such as hearing aids.
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