Oscillator circuit

Details Oscillator circuit Oscillator circuit

2007-03-06

2007-03-06

Kinkead, Arnold (Department: 2817)

Oscillators

Frequency stabilization

C331S1170FE, C331S167000, C331S17700V, C331S03600C, C331S10800D

Reexamination Certificate

active

10379472

ABSTRACT:
In the case of a voltage-controlled LC oscillator (4), the effects of supply voltage fluctuations are reduced according to the invention, due to the fact that a stabilized voltage source (3) is assigned to the LC oscillator (4), which supplies the LC oscillator (4) with a stabilized voltage. This in particular is the case if the LC oscillator (4) is integrated together with other circuit components in a semiconductor and heavy noise or strong disturbances occur on supply voltage lines (1, 2). Advantageously, the stabilized voltage source (3) is formed by an operational amplifier (6), after which a driver transistor (5) is positioned, whereby the operational amplifier is subjected to a reference voltage (7).

REFERENCES:
patent: 4588968 (1986-05-01), Wile
patent: 4635296 (1987-01-01), Dinsmore
patent: 5151667 (1992-09-01), Nishijima
patent: 5604466 (1997-02-01), Dreps et al.
patent: 5914513 (1999-06-01), Shenai et al.
patent: 6281758 (2001-08-01), Elsayed et al.
patent: 6667506 (2003-12-01), Reedy et al.
patent: 6731182 (2004-05-01), Sakurai
Rauscharmer UKW-Oszillator mit Diodenabstimmung, digitaler Frequenzratung und Frequenzanzeige, by Michael Marton, UKW-Berichte 4, pp. 194-209. 1980 (w/ translated abstract).

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