Oscillators – Frequency stabilization – Temperature or current responsive means in circuit
Reexamination Certificate
2007-10-16
2007-10-16
Mis, David (Department: 2817)
Oscillators
Frequency stabilization
Temperature or current responsive means in circuit
C331S025000, C331S03600C, C331S115000, C331S132000, C331S17700V
Reexamination Certificate
active
11289269
ABSTRACT:
An oscillator circuit comprising a resonant circuit which includes a negative resistor, an inductor and an oscillation frequency setting capacitor whose capacitance is varied according to a control voltage based on oscillation frequency data and which outputs a signal having an oscillation frequency based on the oscillation frequency data, a temperature detector which outputs temperature compensation data, based on the temperature, and temperature compensating capacitors which are electrically connected to the resonant circuit and which are supplied with the temperature compensation data to change capacitance values thereof based on the temperature compensation data, thereby adjusting the oscillation frequency.
REFERENCES:
patent: 6853262 (2005-02-01), Feikas et al.
patent: 6980062 (2005-12-01), Fujita
patent: 2005/0128017 (2005-06-01), Meltzer
patent: 2006/0017519 (2006-01-01), Pernia et al
patent: 55-104105 (1980-08-01), None
patent: 61-118630 (1986-06-01), None
patent: 2001-352218 (2001-12-01), None
Japanese Official Notice of Reasons of Rejection dated Jun. 20, 2006.
Mis David
Oki Electric Industry Co. Ltd.
Studebaker Donald R.
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