Low noise oscillator

Details Low noise oscillator Low noise oscillator

1992-03-31

1993-06-08

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331 36C, 331 44, 331 74, 331177V, 455260, 455264, H03B 512

Patent

active

052183254

ABSTRACT:
A low noise oscillator for use in a radio which provides an output signal with high signal-to-noise ratio. The low noise oscillator includes a voltage controlled oscillator which produces an intermediate sinusoidal voltage signal in response to a DC tuning voltage. The voltage controlled oscillator includes a varactor and junction field effect transistor. The low noise oscillator also includes a buffer amplifier which receives the intermediate sinusoidal voltage signal from a tapped microstrip of the voltage controlled oscillator and produces a highly stable output signal proportional to the DC tuning voltage applied to the input of the low noise oscillator. The buffer amplifier employs a dual gate Gallium Arsenide field effect transistor.

REFERENCES:
patent: 3375467 (1968-03-01), Weinrich
patent: 4158182 (1979-06-01), Washburn
patent: 4590443 (1986-05-01), Ishigaki et al.
patent: 4626802 (1986-12-01), Gailus
patent: 5063358 (1991-11-01), Vale et al.
patent: 5107228 (1992-04-01), Pham et al.

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