Dimming control circuit having feedback frequency control

Details Dimming control circuit having feedback frequency control Dimming control circuit having feedback frequency control

1995-11-13

1997-07-15

Lee, Benny

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

315307, 315DIG4, H05B 3702

Patent

active

056487029

ABSTRACT:
A feedback dimming control circuit for controlling the luminance of a plurality of lamps, the circuit comprising: a multiplier receiving and multiplying a feedback current and an input voltage, a first subtracter generating an error signal by subtracting an output voltage from the multiplier from a reference voltage, a second subtracter subtracting a signal responsive to the error signal from the input voltage, an oscillator generating a periodic signal in response to the output of the second subtracter; and a tank resonating in response to the periodic signal and generating the feedback current.

REFERENCES:
patent: 4933605 (1990-06-01), Quazi et al.

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