Oscillator having a resonator coupled to an amplifier by a serie

Details Oscillator having a resonator coupled to an amplifier by a serie Oscillator having a resonator coupled to an amplifier by a serie

1998-09-24

2000-08-01

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331167, 331177V, H03B 512

Patent

active

060972580

ABSTRACT:
An oscillator is formed by a resonator (RES) coupled to an amplifier (AMP) via a coupling path (COP). In order to counter unwanted oscillations due to parasitic resonances in the coupling path (COP), the coupling path (COP) includes a series resistance (RS). This allows better performance in terms of noise for countering unwanted oscillations, despite the fact that the series resistance is in itself a source of noise. An even better noise-performance is obtained if the coupling path (COP) also includes a series capacitance. Such a series capacitance will also effectively widen a frequency range over which the oscillator can be tuned.

REFERENCES:
patent: 4350971 (1982-09-01), Forrester et al.
patent: 5434544 (1995-07-01), Van Veenendaal
Jerry C. Whitaker, "The Electronics Handbook", 1996, Technical Press, Inc. (Beaverton, Oregon), pg. 1170-1172, Especially p. 1171.

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