Patent ID: 8659346
Filing Date: 2014-02-25
Classification: G05F

Abstract:
1. A body-bias voltage controller comprising: a plurality of transistors, at least one of which being supplied with a body-bias voltage; a monitor circuit to detect voltage characteristics of the plurality of transistors and to output an indicator signal; and a body-bias voltage generator to generate the body-bias voltage based upon the indicator signal; wherein the voltage characteristics detected by the monitor circuit include a difference between voltage characteristics of at least two transistors of the plurality of transistors, and the body-bias voltage generator is operable to reduce the difference; wherein the voltage characteristics of the at least two transistors include threshold voltages, and the at least two transistors include a first transistor and a second transistor whose backgate terminals are supplied with the body-bias voltage; wherein the monitor circuit includes, wherein the body-bias voltage generator is operable to adjust the body-bias voltage based on the first comparison signal such that the difference voltage is within a range corresponding to the reference voltage.