Crystal oscillator

Details Crystal oscillator Crystal oscillator

2007-07-24

2007-07-24

Lee, Benny (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S066000, C331S1160FE, C331S162000, C331S176000, C331S17700V

Reexamination Certificate

active

11089121

ABSTRACT:
A quartz crystal oscillator in which phase noise is reduced includes: a resonance circuit having a quartz crystal unit and a split capacitor connected to the crystal unit; a transistor for oscillation having its base connected to the node of the crystal unit and the split capacitor; an output line for connecting the mutual node of the split capacitor to the emitter of the transistor; a quartz crystal resonator that is inserted in the output line; and a temperature compensation mechanism for compensating the frequency-temperature characteristics of both the crystal unit and the crystal resonator.

REFERENCES:
patent: 3457529 (1969-07-01), Merdian, Jr.
patent: 4833426 (1989-05-01), Robichon et al.
patent: 5341112 (1994-08-01), Haman
patent: 5898345 (1999-04-01), Namura et al.
patent: 6836190 (2004-12-01), Kato
patent: 2002/0149434 (2002-10-01), Toncich et al.
patent: 2004/0189412 (2004-09-01), Kato
patent: 9-153740 (1997-06-01), None

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