Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent
1989-01-23
1990-05-29
Mottola, Steven
Amplifiers
Hum or noise or distortion bucking introduced into signal...
332162, H03F 132, H03C 106
Patent
active
049299069
ABSTRACT:
A feedback linearization technique for a power amplifier that does not require the availability of the modulation signals. The RF input signal is down converted to a first IF signal. A portion of the amplifier RF output signal is used to form a feedback signal that is down converted to produce a second IF signal that is subtracted from the first IF signal to produce a different signal. The difference signal is filtered and amplified, and then up converted to RF for input to the power amplifier. Use of feedback at IF avoids stability problems inherent in RF feedback techniques.
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McCandless Jay H.
Voyce Kenneth G.
Mottola Steven
The Boeing Company
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