Diode clamping arrangement for use in electronic ballasts

Details Diode clamping arrangement for use in electronic ballasts Diode clamping arrangement for use in electronic ballasts

1996-05-03

1997-07-22

Sterrett, Jeffrey L.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 98, H02M 75387

Patent

active

056509251

ABSTRACT:
An electronic ballast includes a low cost circuit for power factor correction. A PWM circuit utilizes a wave form signal derived from the ballast inverter as a reference. The reference wave form signal is combined with a feed back signal to form a composite control signal that is compared with the reference voltage to create a pulse width modulated signal.

REFERENCES:
patent: 4849651 (1989-07-01), Estes
patent: 5177408 (1993-01-01), Marques
patent: 5422765 (1995-06-01), Kobayashi et al.
patent: 5568041 (1996-10-01), Hesterman

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