Piezo-electric tuning fork oscillation circuit

Oscillators – Solid state active element oscillator – Transistors

Patent

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Details

Other Related Categories

310 96, 331163, H03B 536

Type

Patent

Status

active

Patent number

040286401

Description

ABSTRACT:
A piezo-electric tuning fork oscillation circuit including a piezo-electric tuning fork and amplifier units, such as ordinary audio frequency signal amplifier circuits employing transistors, between which amplifier units, a phase correction circuit comprising resistance and capacitance is inserted. In the phase correction circuit, the oscillation frequency coincides with the center frequency of the tuning fork over a wide frequency range with phase shift angle of the correction circuit being adapted to increase as the frequency increases, for producing stable oscillating frequency with possible maximum oscillation output.

REFERENCES:
patent: 3713045 (1973-01-01), Usuda et al.
patent: 3946257 (1976-03-01), Kawamura

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