Patent number: 6760238

Apparatus and method for DC/DC converter having high speed and accuracy

Original Assignee: BC Systems, Inc

Field of technology: Electronics

Patent granted on: Tue, 06 Jul 2004

Patent drawing

Abstract

A system and method for DC/DC conversion are provided in which a high accuracy digital pulse width modulator controller circuit controls a power switch to obtain a desired DC output. The control circuit amplifies the difference of a DC output sample in relation to voltage reference. The amplified difference is then compared with a portion of the DC output. The compared result is used for controlling the power switch. A ripple coming from the DC output side is overlaid upon either one of the inputs to the comparator depending upon the polarity of the ripple signal.