Suppressed-fundamental frequency three-way predistorter

Details Suppressed-fundamental frequency three-way predistorter Suppressed-fundamental frequency three-way predistorter

1985-09-05

1987-10-06

Miller, Stanley D.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

328165, 455 43, H04B 100, H03B 100

Patent

active

046985972

ABSTRACT:
A predistorter for use in transmission systems which employ power amplifiers, employing traveling wave tubes or field effect transistors. Since these active components present a nonlinear characteristic, which introduce amplitude and phase distortion in the amplified signal, the distorter circuit operates to subtract the distortion products from the output signal. In the present arrangement, the subtraction takes place before amplifying the signal by means of generation of distortion products which will present the same amplitude and opposite phase of those that will be generated by the power amplifier in order to obtain an undistorted and amplified signal.

REFERENCES:
patent: 3374435 (1968-03-01), Engel
patent: 3889199 (1975-06-01), Gutleber
patent: 4311963 (1982-01-01), Watanabe et al.
patent: 4329655 (1982-05-01), Nojima et al.

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