Patent ID: 7696794
Filing Date: 2010-04-13
Classification: H02M

Abstract:
1. A drive circuit for generating a drive signal for a switch in a switching converter dependent on a control signal, the switching converter configured to generate a rectified switching converter output voltage, the drive circuit comprising: a first input terminal configured to receive the control signal, the control signal being generated dependent on the rectified switching converter output voltage; a supply terminal configured to receive a supply voltage; a first set of circuit components and a second set of circuit components collectively operable to generate the drive signal based on the control signal and using bias voltages, the first set of circuit components operably connected to receive a first supply voltage derived at least in part from the control signal, the second set of circuit components operably connected to receive a second supply voltage derived substantially only from the supply voltage, the set of circuit components further operably connected such that the first supply voltage is also derived in part from the supply voltage at least some time; a first voltage regulator coupled between the supply terminal and the input terminal, wherein the first voltage regulator is adjustable and provides an output potential based at least in part on a setting signal.