Alternating power supply whose mean power is controlled on the basis of an adjustable direct-current voltage and its application to the adjustment of the illumination of lamps supplied with alternating current

摘要

Device intended to supply an alternating voltage with mean power which can be adjusted as a function of the variation of a direct-current voltage, characterised in that it includes: - a binary rate multiplier BRM able to generate a variable number of clock pulses distributed over a predetermined time interval, the said multiplier being synchronised by the alternating power supply voltage; - an analogue/digital converter (CAN) to the input of which is applied the variable direct-current voltage and whose output is linked to the programming input of the multiplier; and - a changeover switch element T controlled by the said clock pulses and to which is applied the said alternating power supply voltage. Application to the production of an on-board brightness attenuator. IMAGE