Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent
1997-04-09
2000-03-21
Lee, Benny
Amplifiers
Hum or noise or distortion bucking introduced into signal...
330296, 381 945, H03F 126
Patent
active
060407409
ABSTRACT:
The present invention includes a method of lessening or suppressing a transient voltage comprising the step of biasing an output node for an output signal. The step of biasing includes a charge rate that is variable to lessen or suppress the transient, which can be audible. A node is biased to a voltage that corresponds to a voltage of an input signal. Preferably, the node is biased prior to providing the output signal. The present invention also includes a device for lessening a transient of an amplifier comprising a switch coupled to an output of the amplifier and a bias voltage source, wherein the switch is controllable to bias the output prior to the amplifier providing an amplified audio signal. The resistance of the switch can be variable to adjust the lessening of, or suppress, the transient. Instead of the switch, an impedance device can be used. The present invention contemplates lessening or suppressing the transient by either adjusting the charge rate or the bias voltage of the node. Alternatively, both the charge rate and bias voltage can be adjusted to lessen or suppress the transient.
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Lee Benny
LSI Logic Corporation
Nguyen K V
LandOfFree
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