Patent ID: 6510062
Filing Date: 2003-01-21
Classification: H02M

Abstract:
A bias generator for use with an isolating voltage converter having a transformer with an input-side winding coupleable between a source of input-side referenced Vin and an input-side referenced switch, and with an output-side winding from which an output-side referenced potential Vo is derived, the converter further having an output-side referenced pulse width modulator (PWM), biasable by said bias generator, coupled to sample Vo and to control operation of said switch without requiring intervening rectification, said bias generator comprising:an input-side referenced waveform generator, coupleable to said Vin, outputting a periodic signal; an output-side referenced rectifier circuit; first and second capacitors, each coupled between a node of said waveform generator and said rectifier circuit; wherein a potential appearing at said rectifier circuit is an output-side referenced Vbias potential coupleable to said PWM.