Amplifiers – With periodic switching input-output
Reexamination Certificate
2007-04-19
2008-12-16
Pascal, Robert (Department: 2817)
Amplifiers
With periodic switching input-output
C330S010000, C330S251000, C330S20700P
Reexamination Certificate
active
07466194
ABSTRACT:
An amplifier is described which includes a first loop including a first amplifier stage having an offset voltage associated therewith. An output stage includes two switching devices in a bridge configuration configured to be coupled between a supply voltage and ground. An output of the bridge configuration is configured to be coupled to a load. The first loop is characterized by a first gain. A decoupling capacitor is configured to be coupled to the load. A second loop which includes the first amplifier stage is configured to charge the decoupling capacitor to a first voltage generated with reference to the offset voltage before operation of the switching devices is enabled. The second loop is characterized by a second gain. The first and second gains are substantially the same such that when operation of the switching devices is enabled a second voltage at the output of the half-bridge configuration is substantially the same as the first voltage.
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Mazda Babak
Sahandiesfanjani Farzad
Sarangapani Krishna Prasad
Sayyedi Maziar
Shinkre Rahul
Cirrus Logic Inc.
Nguyen Hieu P
Pascal Robert
Weaver Austin Villeneuve & Sampson LLP
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