Patent ID: 8035359
Filing Date: 2011-10-11
Classification: H03F,H03K,H04L

Abstract:
1. A power recovery circuit for recovering wasted power supplied to a differential driver pair in a system through resistor loads connected to a system supply, comprising: a biasing control circuit having a current sensing and control element coupled to sources of the differential driver pair to bias the sources of the differential driver pair; a start up circuit coupled to the resistor loads of the differential driver pair, the start up circuit enabled to provide an initial starting bias voltage and current to the biasing control circuit when a driver power supply is enabled; and, a voltage regulator coupled to an output of the biasing control circuit to regulate an output supply voltage to electronic circuits; the power recovery circuit configured for recovering wasted power from power supplied to the differential driver pair, in the form of current and voltage available at a connected source of the differential driver pair to provide regulated power to electronic circuits.