Reference frequency control circuit

Details Reference frequency control circuit Reference frequency control circuit

2011-03-22

2011-03-22

Pascal, Robert (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S1160FE, C331S03600C, C331S17700V

Reexamination Certificate

active

07911285

ABSTRACT:
A reference frequency control circuit comprising: a frequency voltage converting circuit configured to receive an oscillation signal from an oscillator circuit, and output an output voltage corresponding to a frequency of the oscillation signal, the oscillator circuit being a circuit configured to oscillate at a frequency corresponding to a level of an input signal; and a control circuit configured to control a level of the input signal so that the output voltage is at a predetermined level.

REFERENCES:
patent: 5994967 (1999-11-01), Nguyen
patent: 6271733 (2001-08-01), Alzu et al.
patent: 6791421 (2004-09-01), Oita
patent: 6856205 (2005-02-01), Groe et al.
patent: 6958660 (2005-10-01), Adduci et al.
patent: 2004-140817 (2004-05-01), None
patent: 2006-287765 (2006-10-01), None

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