Linearizer for TWT amplifiers

Details Linearizer for TWT amplifiers Linearizer for TWT amplifiers

1986-09-26

1988-06-21

Mullins, James B.

Amplifiers

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

330 43, H03F 133

Patent

active

047527439

ABSTRACT:
The input signal to a TWT amplifier is predistorted in amplitude and phase to the inverse of the amplifier transfer characteristic by an adjustable circuit including a phase linearizing section and an amplitude linearizing section, both in series with the input signal and amplifier. Each section includes two pairs of back-to-front Schottky diodes. Preferably an additional diode is in series with one pair for the amplitude section. The diodes of each pair are of like polarity and opposite to the diodes of the other pair of the section. Additional diodes are connected between the pair junctions and ground, and adjustable D.C. bias fed into these junctions. Additional resistors and capacitors bridge the pairs, and are arranged into a phase delay network in one of the sections.

REFERENCES:
patent: 3849676 (1974-11-01), Bareyt

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