Patent ID: 9456474
Filing Date: 2016-09-27
CPC Classification: H02M,H05B,Y02B

Claim Text:
1. A biasing and driving circuit for an electric load, having input terminals configured to receive an a.c. input voltage and output terminals configured to supply a d.c. output voltage to said electric load, comprising: a voltage regulator with a feedback loop having a feedback input configured to receive a sensing voltage that is a function of a supply current that flows through the electric load and for regulating, on the basis of the sensing voltage received, said supply current; and a resistive sensing element, operatively coupled to the feedback input, configured to receive the supply current and generate said sensing voltage as a function of said supply current received; a current transducer, of a resistive type, coupled to the feedback input; and an auxiliary biasing circuit configured to receive said a.c. input voltage and to inject through said current transducer an a.c. auxiliary biasing current that varies in a way inversely proportional to the a.c. input voltage.