Class D amplifier with bandwidth independent of load impedance
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United States of America Patent
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Jun 19, 2001
Grant Date -
N/A
app pub date -
Nov 10, 1999
filing date -
Nov 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A high Q low pass filter removes the carrier from a Class D amplifier. Speaker impedance varies with frequency, and it is desirable for to drive 2, 4 and 8 ohm speakers. The bandwidth feedback compensation network 800 adds a pole-zero combination to the feedback loop to reduce the Q of the low pass filter and to maintain the bandwidth of the amplifier.
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