High-frequency oscillator

Details High-frequency oscillator High-frequency oscillator

2006-05-09

2006-05-09

Chang, Joseph (Department: 2817)

Oscillators

Plural oscillators

Selectively connected to common output or oscillator...

C331S046000

Reexamination Certificate

active

07042297

ABSTRACT:
A frequency-selective high-frequency oscillator includes a first switching circuit that controls the operation of a first amplifying circuit, and a second switching circuit that controls the operation of the first switching circuit and a second amplifying circuit. Switching control signals are input to the second switching circuit. When the switching control signal is “Low”, the second switching circuit turns ON and the second amplifying circuit only operates, thereby outputting a high frequency signal with a resonant frequency according to a second resonant circuit. On the other hand, when the switching control signal is “High”, the second switching circuit turns OFF and the first switching circuit turns ON, which causes the first amplifying circuit only to operate. Thus, a high frequency signal with a resonant frequency acceding to a first resonant circuit is output.

REFERENCES:
patent: 6411168 (2002-06-01), Yoshida
patent: 2002/0125958 (2002-09-01), Ikarashi
patent: 2001-237640 (2001-08-01), None

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