Butler oscillator

Details Butler oscillator Butler oscillator

1975-06-30

1976-12-07

Kominski, John

Oscillators

Solid state active element oscillator

Transistors

331109, 331159, H03B 536

Patent

active

039965309

ABSTRACT:
An amplitude limiting amplifier followed by a filter network is interposed between the voltage amplification stage and the impedance matching stage in a Butler oscillator. This allows both the voltage amplification stage and the impedance matching stage to be operated in a linear mode at all times which assures that a piezoelectric crystal connected between the stages is connected in a relatively low, constant impedance path and is driven by a sinusoidal waveform, free of distortion, to assure maximum frequency stability.

REFERENCES:
patent: 2912654 (1959-11-01), Hansen
patent: 3015785 (1962-01-01), Vass
patent: 3026487 (1962-03-01), Walsh et al.
patent: 3239776 (1966-03-01), Shaw
patent: 3319186 (1967-05-01), Lam
patent: 3649850 (1972-03-01), Davis
IBM Tech. Disc. Bul. "Sym. Square-Wave Output Crystal Osc." J. S. Chomicki, vol. 8, No. 4, Sept. 1965.
IBM Tech. Disc. Bul. "Oscillator", Neal et al. vol. 11, No. 5, Oct. 1968.
IBM Tech. Disc. Bul. "Crystal Osc.", Evans vol. 9, No. 2 July 1966.

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