Patent ID: 7554311

Claim:
A voltage generation circuit, comprising: a voltage producing circuit that receives an input voltage and outputs an output voltage at an output terminal, and the voltage producing circuit having a control terminal; a comparison circuit operatively connected to the voltage producing circuit, the comparison circuit operating to compare a feedback signal received at an input terminal with a reference signal to produce a feedback signal that is supplied to the control terminal of the voltage producing circuit; a first feedback circuit operatively connected to the output terminal of the voltage producing circuit and to the comparison circuit, the first feedback circuit providing a first feedback signal to the input terminal of the comparison circuit; and a second feedback circuit operatively connected to the output terminal of the voltage producing circuit and to the comparison circuit, the second feedback circuit providing a second feedback signal to the input terminal of the comparison circuit, wherein the second feedback circuit can be enabled or disabled, whereby the voltage generation circuit operates with substantially reduced power when the second feedback circuit is disabled.