Oscillation generator providing oscillations of varying amplitud

Details Oscillation generator providing oscillations of varying amplitud Oscillation generator providing oscillations of varying amplitud

1977-10-17

1979-07-31

Smith, Alfred E.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge control discharge device in the supply circuit

315205, 331 47, 331 54, 331106, 331114, H05B 3702, H03B 302

Patent

active

041631773

ABSTRACT:
An oscillation generator providing a succession of oscillations repetitively and progressively varying in amplitude includes a feedback oscillator arranged to receive its operating voltage from a capacitor that is progressively charged from a periodically fluctuating voltage source by way of an SCR and a timing circuit arranged to progressively vary the timing during the fluctuation period of the source of firing signals applied to the SCR. The timing circuit includes a firing capacitor charged from a unidirectional source and semiconductor switches arranged, when the potential on the firing capacitor attains a predetermined level, to discharge the capacitor into the trigger electrode of the SCR. The time required for the potential on the firing capacitor to reach the predetermined level is varied by a saw-tooth generator that controls the charging potential for the capacitor. The oscillator output may be applied directly to energize an electric discharge tube, or may be applied to a power amplifier fed from a constant source, that in turn energizes a discharge tube.

REFERENCES:
patent: 2598473 (1952-05-01), Warner et al.
patent: 2892125 (1959-06-01), Warner et al.
patent: 3037145 (1962-05-01), Warner et al.
patent: 3424947 (1969-01-01), Warner et al.

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