Feed forward distortion minimization circuit

Details Feed forward distortion minimization circuit Feed forward distortion minimization circuit

1990-12-17

1991-12-31

LaRoche, Eugene R.

Amplifiers

With amplifier bypass means

330149, 328163, H03F 132

Patent

active

050775324

ABSTRACT:
A feed forward distortion minimization circuit which receives an input signal and routes the input signal along two signal paths is disclosed. One path, the main signal path, includes a distortion generator such as, for example, a power amplifier, which generates an output signal having a distortion component. The other path, the feed forward signal path, includes a delay line responsive to the input signal for feeding the input signal forward, without distortion. The output signal from the distortion generator is combined with a fed forward input signal to form an error signal representative of the distortion component. A feedback circuit is employed to detect a DC current or RF voltage proportional to the error signal's signal strength and to adjust the amplitude and the phase of signals in the feed forward or main signal paths to reduce the carrier to distortion ratio of the error signal. Thereafter, the error signal is subtracted from the main signal path to cancel any distortion components therein. The subtraction is controlled by circuitry which detects distortion at the main signal path output, and adjusts the amplitude and the phase of the error signal, so that when the error signal is subtracted from the main signal path, substantially all distortion is cancelled.

REFERENCES:
patent: 3815040 (1974-06-01), Seidel
patent: 3922617 (1975-11-01), Denniston et al.
patent: 4389618 (1983-06-01), Bauman
patent: 4394624 (1983-07-01), Bauman
patent: 4580105 (1986-04-01), Myer
patent: 4879519 (1989-11-01), Myer
patent: 4885551 (1989-12-01), Myer
patent: 4943783 (1990-07-01), Nojima
patent: 4987378 (1991-01-01), Eggleston et al.

Affiliated with

Also associated with

Rating

Feed forward distortion minimization circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Feed forward distortion minimization circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Feed forward distortion minimization circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1512836