Dimmer control circuit

Details Dimmer control circuit Dimmer control circuit

H - Electricity

05

B

315/19

H05B 37/02 (2006.01) H02M 1/08 (2006.01) H05B 39/08 (2006.01)

Patent

CA 1090411

ABSTRACT OF THE DISCLOSURE An improved solid state electronic dimmer circuit for controlling the intensity of large electric lamps, such as theater and television lamps, in response to a low power DC control signal. The transfer charac- teristic of the circuit is determined by the properties of a generated precision waveform having a predetermined shape and amplitude and a fixed phase relationship to the power line voltage which, in conjunction with the DC control signal, determines the effective voltage at the output of a dimmer unit. The same precision waveform may be used to control a plurality of dimmer channels, thereby making possible precise matching of performance of all commonly controlled channels, and effecting significant savings in the cost of manufacture.

302566

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