Compensation method in a class-G amplifier output stage
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United States of America Patent
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Mar 25, 2003
Grant Date -
Nov 28, 2002
app pub date -
May 22, 2002
filing date -
May 22, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved class-G amplifier (FIG. 2) is provided by adding a first capacitor (82) between the input of current mirror (18) and node p, and by adding a second capacitor (84) between the input of current mirror (20) and node m. The added capacitors (82) and (84) can be sized to stabilize frequency responses when high power supplies are enabled. The added capacitors (82) and (84) further function to reduce transient currents during switching through the crossover points between first upper and lower power supplies (Vsp1, Vsph) and between second upper and lower power supplies (Vsm1, Vsmh).
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