Current chopper-type D class power amplifier
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United States of America Patent
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N/A
Issued Date -
Jan 29, 2004
app pub date -
Dec 31, 2002
filing date -
Jul 24, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An output current fed to a load is controlled by a full bridge formed with first to fourth transistors. First and second mirror transistors provided to form current mirrors with transistors forming the full bridge, and first and second detection resistances respectively connected to the first and second mirror transistors in series are provided. Operations of the full bridge are controlled corresponding to detection voltages at the first and second detection resistances. Further, on-off switching of transistors belonging to one side of the bridge is controlled corresponding to voltage drop at the detection resistance provided corresponding to the other side of the bridge.
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