LC-switched transistor oscillator for vibrator excitation

Oscillators – Solid state active element oscillator – Transistors

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331161, 310316, H03B 536

Patent

active

045104646

ABSTRACT:
A self-oscillating vibrator exciting circuit utilizing a drive transistor that operates in a switching mode. The ON-period of the transistor is determined by base/emitter inductance and capacitance and base/collector capacitance, while the OFF-period of the transistor is determined by collector/emitter inductance and capacitance. The vibrator is connected between transistor collector and emitter, and the ON-period frequency of the transistor is set in the neighborhood of the resonance frequency of the vibrator so that the vibrator exciting circuit oscillates generally at the resonance frequency of the vibrator.

REFERENCES:
patent: 3581240 (1971-05-01), Enderby
patent: 4318062 (1982-03-01), Mitsui et al.
patent: 4338576 (1982-07-01), Takahashi
patent: 4359697 (1982-11-01), Takahashi
patent: 4431975 (1984-02-01), Podlesny
Craig, W. E., "Oscillator", IBM Technical Disclosure Bulletin, vol. 5, No. 2, Jul. 1962.
Stankaitis, R. F., "Crystal Controlled Blocking Oscillator", IBM Technical Disclosure Bulletin, vol. 4, No. 3, Aug. 1961.

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