Oscillator frequency drift compensated by varying different bias

Details Oscillator frequency drift compensated by varying different bias Oscillator frequency drift compensated by varying different bias

1998-06-01

2000-03-28

Grimm, Siegfried H.

Oscillators

Frequency stabilization

331176, H03L 100

Patent

active

060437200

ABSTRACT:
A frequency-drift (.DELTA.F) of an oscillator (OSC) is compensated (.apprxeq.-.DELTA.F) by varying various different biassing parameters (V,I) in the oscillator. The biassing parameters (V,I) which are varied may include, for example, voltages (V) or currents (I), either exclusively or in combination, which are supplied to transistors forming part of the oscillator (OSC). The biassing parameters (V,I) may be varied as a function of temperature by one or more elements with suitably chosen temperature coefficients and/or by one or more biassing circuits which provide biassing voltages or currents which vary as a function of temperature, or both.

REFERENCES:
patent: 4255721 (1981-03-01), Wilson, Jr.
patent: 4888566 (1989-12-01), Bong et al.
patent: 4978930 (1990-12-01), Suter
patent: 5151667 (1992-09-01), Nishijima
patent: 5180995 (1993-01-01), Hayashi et al.
patent: 5440277 (1995-08-01), Ewen et al.

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