Broadband linearizer for power amplifiers

Details Broadband linearizer for power amplifiers Broadband linearizer for power amplifiers

1998-12-01

1999-10-12

Lee, Benny

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330124R, H03F 126, H03F 368

Patent

active

059660490

ABSTRACT:
A broadband linearizer for use with a power amplifier. The broadband linearizer includes a broadband linearizer bridge, a preamplifier/attenuator, a post amplifier/attenuator, and a control circuit. The broadband linearizer bridge includes a power divider and a power combiner interconnected by linear and nonlinear arms. The linear arm has a phase shifter, a passive equalizer, and a first delay line that are serially coupled together. The nonlinear arm has a distortion generator, an attenuator and a second delay line that are serially coupled together. The control circuit controls respective settings of the broadband linearizer bridge, preamplifier/attenuator and post amplifier/attenuator. The control circuit provides bias circuitry and sends command and telemetry signals to control operation of the broadband linearizer. The broadband linearizer provides for independent, flexible gain and phase control that can mate with different kinds of power amplifiers having various gain and phase performance.

REFERENCES:
patent: 5291148 (1994-03-01), Reisner et al.
patent: 5789978 (1998-08-01), Zhang et al.

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