Ballast for gas discharge lamp

Details Ballast for gas discharge lamp Ballast for gas discharge lamp

H - Electricity

05

B

H05B 41/14 (2006.01) H05B 41/298 (2006.01) H05B 41/392 (2006.01)

Patent

CA 2112434

ABSTRACT: Ballast for gas discharge lamps. A ballast stabilization arrangement is provided for minimizing or eliminating lamp current oscillation, or moding, of gas discharge lamps, such asfluorescent lamps, and a method for carrying out this arrangement is described. This is carried out by adding a frequency response zero to the current circuitry in a ballast. An example of this circuitry includes a feedback network where a sensed lamp current signal is compared with a reference signal by an error amplifier having a resistance placed in series with its feedback capacitance to implement the zero in the frequency response of the control circuit.

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