Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular error voltage control
Reexamination Certificate
2007-10-02
2007-10-02
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular error voltage control
C331S03600C, C331S1170FE, C331S17700V
Reexamination Certificate
active
10969927
ABSTRACT:
A differential type voltage control oscillator is formed of a differential tank circuit, an oscillation transistor, and a differential variable capacitance circuit. The differential variable capacitance circuit has a configuration wherein at least one pair of varactor diodes are connected in an anti-parallel manner, and are separated by means of a plurality of capacitors in a direct current manner. In addition, a differential control voltage is generated by a charge pump circuit which is controlled by the output of a phase comparator, and the differential control voltage is directly applied across the anodes and the cathodes of the varactor diodes.
REFERENCES:
patent: 5677648 (1997-10-01), Jones
patent: 6281758 (2001-08-01), Elsayed et al.
patent: 2004/0066244 (2004-04-01), Takinami et al.
patent: 6280421 (1987-05-01), None
patent: 28221 (1990-01-01), None
patent: 04223601 (1992-08-01), None
patent: 7297710 (1995-11-01), None
patent: 2000332602 (2000-11-01), None
patent: 2001339300 (2001-12-01), None
B. Razavi; “RF Microelectronics 1st Edition—Cased,” Prentice Hall, Dec. 1997, ISBN: 0-13-887571-5, pp. 234-303 with English translation pp. 212-277.
Japanese Office Action dated Jul. 13, 2007 with English translation.
Ando Toshiakira
Ishida Kaoru
Matsushita Electric - Industrial Co., Ltd.
Mis David
Stevens Davis Miller & Mosher LLP
LandOfFree
Oscillation device and mobile communication apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oscillation device and mobile communication apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillation device and mobile communication apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3892283