Amplifier circuit with correction of amplitude and phase distort

Details Amplifier circuit with correction of amplitude and phase distort Amplifier circuit with correction of amplitude and phase distort

1990-12-21

1992-08-25

Mottola, Steven

Amplifiers

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

330107, 330136, 328155, H03F 126

Patent

active

051422409

ABSTRACT:
A high frequency amplifier circuit comprises an amplitude characteristic correction circuit and a phase characteristic correction circuit for compensating the non-linearity of the input-output characteristics of the amplifier. The amplitude characteristic correction circuit varies the drain voltage or the collector voltage of the amplifier in accordance with the envelope level of an input signal in such a manner that the relationship between the amplitude of the output of the amplifier and the amplitude of the input signal has linearity. On the other hand, the phase characteristic correction circuit provides a quantity of phase shift to the input signal in accordance with the envelope level of the input signal, and the phase-shifted input signal is applied to the amplifier in such a manner that the phase of the output of the amplifier and that of the input signal coincide with each other.

REFERENCES:
patent: 3755754 (1973-08-01), Putz
patent: 3900823 (1975-08-01), Sokal et al.
patent: 4068186 (1978-01-01), Sato et al.
patent: 4122399 (1978-10-01), Heiter et al.
patent: 4465980 (1984-08-01), Huang et al.
patent: 4532477 (1985-07-01), Green, Jr. et al.
patent: 4600892 (1986-07-01), Wagner et al.

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