High-frequency oscillator and electronic apparatus

Details High-frequency oscillator and electronic apparatus High-frequency oscillator and electronic apparatus

2011-01-11

2011-01-11

Pascal, Robert (Department: 2817)

Oscillators

Plural oscillators

Selectively connected to common output or oscillator...

C331S048000, C331S1170FE, C331S179000

Reexamination Certificate

active

07868705

ABSTRACT:
In a high-frequency oscillator, a first resonance circuit and a second resonance circuit are respectively connected to a first amplifier circuit and a second amplifier circuit. A selection circuit includes a first switch circuit and a second switch circuit which selectively operate one of the first amplifier circuit and the second amplifier circuit. A grounded capacitor is connected to output sides of the first amplifier circuit and the second amplifier circuit. The grounded capacitor is commonly used by both the first amplifier circuit and the second amplifier circuit. An auxiliary grounded capacitor is connected between the first switch circuit and the first amplifier circuit. Accordingly, the grounded capacitor and the auxiliary grounded capacitor are connected to each other in parallel only when the first amplifier circuit is activated.

REFERENCES:
patent: 6292063 (2001-09-01), Tanemura et al.
patent: 6411168 (2002-06-01), Yoshida
patent: 2005/0017814 (2005-01-01), Kawagishi et al.
patent: 63-120409 (1988-08-01), None
patent: 07-030457 (1995-01-01), None
patent: 2003-152446 (2003-05-01), None
Official Communication issued in Internation Patent Application No. PCT/JP2007/050951, mailed on May 1, 2007.

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