Multiplier crystal oscillator

Details Multiplier crystal oscillator Multiplier crystal oscillator

2007-12-25

2007-12-25

Chang, Joseph (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S10800D, C333S247000

Reexamination Certificate

active

11177020

ABSTRACT:
The present invention has a configuration such that in a multiplier crystal oscillator wherein a multilayer board having earthing metal films on both principal planes of an intermediate board, and mount boards laminated on both sides thereof, and at least one multiplier LC filter is arranged on one principal plane of the laminated board, an opening is provided in the earthing metal film that is provided on one principal plane of the intermediate board opposed to an arrangement region of the LC filter, and a ground of the intermediate board is exposed. An object of the present invention is to provide a multiplier oscillator wherein particularly the displacement and irregularity of the multiple frequencies serving as the output frequency is prevented, and furthermore spurious oscillations are suppressed.

REFERENCES:
patent: 4792773 (1988-12-01), Bert et al.
patent: 5373112 (1994-12-01), Kamimura et al.
patent: 2004/0238950 (2004-12-01), Doan
patent: 2005/0221600 (2005-10-01), Daamen et al.
patent: 0 437 976 (1991-07-01), None
patent: 0 437 976 (1995-08-01), None
patent: 2002-57527 (2002-02-01), None
patent: 2002057527 (2002-02-01), None
European Search Report dated Dec. 2, 2005.

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