Timing of different phases in an ignition circuit

Details Timing of different phases in an ignition circuit Timing of different phases in an ignition circuit

1996-09-27

1998-10-20

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Plural load device regulation

315360, 315362, 315209R, G05F 100

Patent

active

058251383

ABSTRACT:
The need of implementing a second local oscillator in addition to the drive oscillator, for timing the different phases of the starting process of a half-bridge or bridge stage driving an external load, such as a fluorescent lamp, is avoided by employing a timing counter to count the number of oscillations produced by the drive oscillator, and a digital-to-analog converter for controlling the frequency of oscillation of the drive oscillator.

REFERENCES:
patent: 4087702 (1978-05-01), Kirby et al.
patent: 4095139 (1978-06-01), Symonds et al.
patent: 4241295 (1980-12-01), Williams, Jr.
patent: 5049790 (1991-09-01), Herfurth et al.

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