Patent ID: 8547166
Filing Date: 2013-10-01
Classification: G05F,H01L

Abstract:
1. A temperature compensation circuit, applied on a metal oxide semiconductor (MOS) transistor, the temperature compensation circuit comprising: a voltage generator, providing a voltage proportional to absolute temperature (VPTAT) to drive a body of the MOS transistor in such way that a variation of the threshold voltage due to temperature variation of the MOS transistor is substantially compensated with a variation of the threshold voltage due to body-source voltage variation of the MOS transistor, so that the MOS transistor corresponds to the equivalent threshold voltage that is temperature invariant; wherein the voltage generator further comprises: a constant voltage generation unit, providing a constant voltage, determining a body-source voltage capable of preventing forward biasing between the body and the source of the MOS transistor; a temperature correlated voltage generation unit, determining a temperature correlated voltage in response to a temperature value of the MOS transistor; and a summation unit, providing the VPTAT according to the constant voltage and the temperature correlated voltage.