Piezoelectric oscillator semiconductor circuit with oscillation

Details Piezoelectric oscillator semiconductor circuit with oscillation Piezoelectric oscillator semiconductor circuit with oscillation

1990-03-01

1991-08-06

Mis, David

Oscillators

Electromechanical resonator

Crystal

331108C, 331116FE, 331179, 331DIG3, H03B 536

Patent

active

050381199

ABSTRACT:
A piezoelectric oscillator semiconductor circuit comprises a piezoelectric oscillator which is set to a designated oscillation frequency via electrical coupling to a separate semiconductor element comprising an oscillation circuit. The oscillation circuit in the semiconductor element has a gate lead and a drain lead connected to the piezoelectric oscillator to set the frequency of operation of the piezoelectric oscillator. Included in the semiconductor element are adjustment means comprising one or more frequency adjustment elements which may be selectively connected to one of the connection leads whereby the frequency of operation of the piezoelectric oscillator may be selectively changed without need for replacement or change of the semiconductor element. The frequency adjustment elements may be comprised of one or more fixed, separately formed capacitances provided as part of the semiconductor element but are electrically independent of the oscillation circuit, i.e., they share the same semiconductor substrate but are padded out of the semiconductor element independent of the pad outputs for the oscillation circuit.

REFERENCES:
patent: 3754152 (1973-08-01), Koehler et al.
patent: 4574255 (1986-03-01), Fujii et al.
patent: 4814640 (1989-03-01), Miyake

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