COMPENSATION MECHANISM FOR COMPENSATING BIAS LEVELS OF AN OPERATION CIRCUIT IN RESPONSE TO SUPPLY VOLTAGE CHANGES

摘要

A compensation circuit is disclosed for compensating bias levels of anoperational circuit in response to variations in a supply voltage. Thecompensation mechanism identifies variations in the supply voltage bycomparing the voltage of a selected node of the operation circuit with arelatively constant or fixed reference voltage. Based on the results of thecomparison, the compensation mechanism adjusts selected bias levels in theoperational circuit, preferably using current stealing circuitry, so that thefunctionality and performance of the operatinonal circuit can be substantiallymaintained. A biasing circuit for biasing one or more differential pairs isalso disclosed.