Patent ID: 7649402

Claim:
A feedback-controlled body-bias voltage source for an integrated circuit comprising: an output monitor comprising an input for a reference voltage and a sense input for sensing an output voltage, said output monitor for comparing said reference voltage to said output voltage and operable for generating a proportional signal for correcting said output voltage based on said comparing; a charge pump for generating said output voltage and comprising an enable input coupled to a control output of said output monitor, and a voltage output coupled to said sense input of said output monitor; and a shunt circuit for correcting said output voltage of said voltage output, said shunt circuit coupled to said voltage output and to said control output of said output monitor, wherein said shunt circuit is configured to be controlled according to said proportional signal of said output monitor, wherein an effective resistance of said shunt circuit is changed in proportion to said proportional signal; wherein said output monitor is operable to compare said reference voltage to said output voltage while said shunt circuit is activated, wherein said proportional signal has a state between an on state and an off state, wherein said state between said on and off states is proportional to a difference between said output voltage and said reference voltage.