Patent ID: 6529354
Filing Date: 2003-03-04
Classification: H02M,H03K,Y02B

Abstract:
For use with a switching circuit that receives an operating voltage Vin and outputs a signal Vo, said switching circuit defineable as having switch circuit-on times and switch circuit-off times but where magnitude of said Vo need not be controllable by a duty cycle ratio of said switch circuit-on times/switch circuit-off times, a method to control at least one parameter describing said signal Vo, comprising:coupling a switch to said operating voltage Vin so as to conduct current through said switch as a function of impedance of said switch such that magnitude of said Vo is controlled by impedance of said switch; and said switch having a switch impedance that is varied continuously during circuit switch-on times between a low switch-on impedance and a higher switch-off impedance during at least one of Vo power-up for said switching circuit and low load coupled to said switching circuit.