Piezoelectric oscillator having a non-inductive load with a...

Details Piezoelectric oscillator having a non-inductive load with a... Piezoelectric oscillator having a non-inductive load with a...

2006-03-07

2006-03-07

Chang, Joseph (Department: 2817)

Oscillators

Electromechanical resonator

Crystal

C331S1160FE, C331S1070DP

Reexamination Certificate

active

07009459

ABSTRACT:
A piezoelectric oscillation circuit has a series circuit composed of a capacitor Cbe as a part of a load capacitance and a capacitor Ce inserted and connected between a base of an oscillation transistor TR1and the ground, and has an emitter resistor Re connected to a connection midpoint A of the series circuit and an emitter of the oscillation transistor TR1. Further, a base bias circuit composed of a resistor RB1and a resistor RB2is connected to a base of the oscillation transistor TR1, has a piezoelectric element Xtal and a capacitor C1inserted and connected in series between the base of the oscillation transistor TR1and the ground, and further has a resistor Rc connected to a collector of the oscillation transistor TR1together with the power supply voltage Vcc line, and has a capacitor Cce connected between the collector and the emitter.

REFERENCES:
patent: 4193046 (1980-03-01), Chiba
patent: 5523722 (1996-06-01), Nakano et al.
patent: 5789990 (1998-08-01), Ash et al.
patent: 5920234 (1999-07-01), Hill
patent: 2001/0043125 (2001-11-01), Sato

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