Low-distortion tri-state switching amplifier
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United States of America Patent
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Sep 4, 2007
Grant Date -
May 3, 2007
app pub date -
Dec 18, 2006
filing date -
Mar 4, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A switching amplifier includes a level shifting circuit for adjusting a voltage level of an original input signal to generate a first input signal and a second input signal. The first input signal is identical to the original input signal except for referring to a first reference level. The second input signal is identical to the original input signal except for referring to a second reference level. In response to the first input signal and an oscillating signal, a first control circuit generates a first width-limited PWM signal for controlling a first half-bridge switching circuit. In response to the second input signal and the oscillating signal, a second control circuit generates a second width-limited PWM signal for controlling a second half-bridge switching circuit.
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