Patent ID: 7592854

Claim:
A temperature-sensing circuit comprising: a first circuit block outputting an output voltage having negative temperature coefficients; a third circuit block outputting an output voltage having positive temperature coefficients; and a second circuit block comprising a resistive circuit configured to a predetermined resistive ratio, said second circuit block adding said output voltages at the predetermined resistive ratio of said resistive circuit such that components of second order temperature coefficients contained in said output voltages of both said first and third circuit blocks are cancelled out, and wherein resistances of said resistive circuit are trimmable to achieve the predetermined resistive ratio, and wherein at least one of the first circuit block and the third circuit block comprises a pair of MOS transistors the output voltage of said at least one of the first circuit block and the third circuit block being generated according to the difference of work functions of gate electrodes of said pair of MOS transistors, and the third circuit block.