Piezoelectric oscillator

Details Piezoelectric oscillator Piezoelectric oscillator

2007-04-17

2007-04-17

Mis, David (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S158000, C331S17700V

Reexamination Certificate

active

10753986

ABSTRACT:
A piezoelectric oscillator including a piezoelectric vibrator that vibrate at desired frequency; a first transistor for exciting the piezoelectric vibrator; a second transistor whose collector connects to an emitter of the first transistor, the second transistor being a base grounded type; a first capacitor connected between the emitter of the first transistor and ground; a series circuit comprising the piezoelectric vibrator and a second capacitor being connected between a base of the first transistor and an emitter of the second transistor, in which the first capacitor and a composition capacitance between base and emitter of the first transistor functions as a split capacitor for a feedback circuit of the Colpitts oscillator.

REFERENCES:
patent: 6836190 (2004-12-01), Kato
patent: 6952140 (2005-10-01), Tamaru
patent: 7009459 (2006-03-01), Satoh et al.

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