Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent
1991-12-13
1993-11-02
Pascal, Robert J.
Amplifiers
Hum or noise or distortion bucking introduced into signal...
328163, H03F 130
Patent
active
052587223
ABSTRACT:
A circuit for amplifying an input signal includes an output amplifier that develops an output signal including distortion at a first magnitude and phase displacement when a signal of a second magnitude is applied thereto and a further amplifier wherein the amplifiers have substantially identical gains and distortion characteristics and are operated at substantially the same input and output levels. The further amplifier is included in a circuit responsive to the input signal wherein the circuit provides an intermediate signal to the output amplifier. The intermediate signal includes a first signal portion comprising a scaled version of the input signal and a second signal portion comprising distortion at substantially the first magnitude and at a phase displacement substantially 180.degree. out of phase relative to the first phase displacement. The output amplifier amplifies the intermediate signal and distortion in the output signal is substantially canceled by application of the second portion of the intermediate signal to the output amplifier.
REFERENCES:
patent: 3755754 (1973-08-01), Putz
patent: 3886470 (1975-05-01), O'Neil et al.
patent: 4472725 (1984-09-01), Blumenkranz
patent: 4517521 (1985-05-01), Preschutti et al.
patent: 4564816 (1986-01-01), Kumar et al.
patent: 4617522 (1986-10-01), Tarbutton et al.
patent: 4633513 (1986-12-01), Taney
patent: 4677390 (1987-06-01), Wagner
patent: 4782307 (1988-11-01), Hsu
patent: 4792751 (1988-12-01), Blumenkranz et al.
patent: 4812779 (1989-03-01), Wagner
patent: 4943783 (1990-07-01), Nojima
patent: 4992754 (1991-02-01), Blauvelt et al.
patent: 5015965 (1991-05-01), Katz et al.
Dinh Tan
General Instrument Corporation, Jerrold Comminications
Pascal Robert J.
LandOfFree
Amplifier circuit with distortion cancellation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplifier circuit with distortion cancellation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplifier circuit with distortion cancellation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1760497