Patent ID: 9006999
Filing Date: 2015-04-14
Classification: H05B,Y02B

Abstract:
1. An apparatus comprising: a rectifier circuit comprising input terminals and output terminals, wherein the rectifier circuit is configured to rectify a line voltage to generate a rectified voltage at the output terminals; a resistor and switch coupled in series; a switch control circuit directly coupled between the output terminals and configured to control the switch only as a function of the rectified voltage; first and second nodes; a variable resistor coupled to the first node; a capacitor coupled to the variable resistor; a diode for alternating current (DIAC) coupled to the variable resistor and the capacitor; a triode for alternating current (TRIAC) comprising a base and terminals, wherein a first of TRIAC terminals is coupled to one of the input terminals of the rectifier circuit, wherein a second of the TRIAC terminals is coupled to the second node, and wherein the base is coupled to the DIAC.