Low-noise oscillator circuit having negative feedback

Details Low-noise oscillator circuit having negative feedback Low-noise oscillator circuit having negative feedback

1997-12-11

1999-05-04

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331117V, 332136, H03B 512, H03C 322

Patent

active

059007885

ABSTRACT:
A low-noise oscillator circuit with an amplifier element for negative feedback, specifically a transistor. In addition to a positive feedback of the oscillator transistor, provision is made for a negative-feedback loop with a pass band of 0 (thus DC coupling) to 1/4 to 1/100 of the oscillation frequency of the oscillator, in order to regulate out fluctuations of the current of the amplifier element.

REFERENCES:
patent: 3374445 (1968-03-01), Gaunt et al.
patent: 3609580 (1971-09-01), Thompson et al.
patent: 3832653 (1974-08-01), Nugent et al.
patent: 3852686 (1974-12-01), Morii
patent: 4158182 (1979-06-01), Washburn
Prigent, M. and J. Obregon.: Phase Noise Reduction in FET Oscillators by Low-Frequency Loading and Feedback Circuitry Optimization. In: IEEE Transactions on Microwave Theory and Techniques, vol. MTT-35, No. 3, Mar. 1987, pp. 349-352.

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