A temperature-sensing circuit includes a first circuit block outputting an output voltage having negative or positive temperature coefficients and a second circuit block amplifying the output voltage of the first circuit block to a predetermined amplitude and outputting the amplified output voltage. It further includes a third circuit block producing a voltage having temperature coefficients of a polarity opposite to that of the first circuit block and adding the produced voltage to the output voltage of the second circuit block to cancel out components of second order temperature coefficients contained in the output voltages of the first and second circuit blocks.