Amplifiers – Hum or noise or distortion bucking introduced into signal...
Reexamination Certificate
2007-05-31
2009-06-02
Choe, Henry K (Department: 2817)
Amplifiers
Hum or noise or distortion bucking introduced into signal...
C330S151000
Reexamination Certificate
active
07541868
ABSTRACT:
A circuit for pre-distorting a signal input to an amplifier includes a signal divider operable for dividing an input signal into signal portions that travel in a primary path and a secondary path. A delay element in each of the primary and secondary paths introduces a group delay to the signal portions in the respective paths. A signal combiner is operable for combining the signals in the respective paths into a combined output signal. A variable gain circuit is arranged in each of the primary and secondary paths. The variable gain circuit is operable to vary the level of the input signal in each path and thereby modulate the overall phase delay of the combined output signal.
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Andrew LLC
Choe Henry K
Wood Herron & Evans LLP
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