Nonlinear signal generating circuit and nonlinear compensating d

Details Nonlinear signal generating circuit and nonlinear compensating d Nonlinear signal generating circuit and nonlinear compensating d

1988-02-02

1990-02-20

Mottola, Steven

Amplifiers

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

333109, 330151, H03F 132

Patent

active

049029835

ABSTRACT:
A device for compensating for nonlinearity of amplifiers by use of a predistortion principle, and a nonlinear signal generating circuit built in such a device. The nonlinear signal generating circuit includes a quadrature hybrid of the type using a distributed constant line. Two diodes and a terminal resistor are connected in parallel and opposite in polarity to each other and connected between the terminals of coupling and passing ports of the hybrid and ground. The nonlinear compensating device is constituted by the combination of a plurality of quadrature hybrids of the type using a distributed constant line and various kinds of diodes. All the circuit segments of the device are implemented with a planar circuit provided on a single dielectric substrate and diodes which are held in a pair chip condition. Such circuitry is accommodated in a single air-tight housing to complete a microwave integrated circuit.

REFERENCES:
patent: 4122399 (1978-10-01), Heiter et al.
patent: 4602227 (1986-07-01), Clark et al.

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