Class AB amplifier with programmable quiescent current
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United States of America Patent
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Aug 2, 2016
Grant Date -
May 12, 2016
app pub date -
Nov 7, 2014
filing date -
Nov 7, 2014
priority date (Note) -
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Abstract
A Class AB amplifier has a control stage and a push-pull stage. The control stage has a programmable resistor that allows a floating constant voltage to applied to the push-pull stage such that the quiescent current of the amplifier is relatively low. The configuration enables the amplifier to operate properly at relatively low power-supply voltage levels. The amplifier can be configured as the output driver for an operational amplifier (op-amp) with a Miller compensation configuration that replaces the conventional Miller compensation resistor with a transistor that is part of the op-amp.
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