Oscillators – Electromechanical resonator – Crystal
Reexamination Certificate
2005-09-27
2005-09-27
Mis, David (Department: 2817)
Oscillators
Electromechanical resonator
Crystal
C331S1160FE, C331S132000, C331S17700V
Reexamination Certificate
active
06949983
ABSTRACT:
In the high-frequency piezoelectric oscillator, capacitors C1, C2as a part of a load capacitor are connected between a base of a transistor TR1and the ground. The connection point of the capacitors C1, C2is connected to an emitter of the transistor TR1, and is grounded via an emitter resistor R1. A base bias circuit consisting of resistors RB1and RB2is connected to the base of the transistor TR1. A piezoelectric vibrator, an inductor, and a resistor are connected in parallel, and connected between the base of the transistor TR1. A capacitor is connected to the parallel circuit and grounded. A collector of the transistor and a power supply line are connected together.
REFERENCES:
patent: 3569865 (1971-03-01), Healey, III
patent: 4600900 (1986-07-01), Renoult et al.
patent: 4646034 (1987-02-01), Chauvin et al.
patent: 4843349 (1989-06-01), Nugent et al.
patent: 5053773 (1991-10-01), Mosinski
Koda & Androlia
Mis David
Toyo Communication Equipment Co., Ltd.
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