Patent ID: 8152363

Claim:
A temperature detection circuit, comprising: a first voltage source circuit configured to generate a first voltage having a temperature dependence by utilizing a work function difference of gate electrodes of a plurality of field effect transistors: a second voltage source circuit configured to generate a reference voltage having no temperature dependence by utilizing a work function difference of gate electrodes of a plurality of field effect transistors; a correction circuit configured to correct the reference voltage and output a corrected voltage; and a subtraction amplifier configured to subtract the corrected voltage from the first voltage, amplify a resulting subtracted voltage, and output a resulting amplified voltage as a correction voltage signal to adjust a temperature coefficient of the correction voltage signal, wherein the correction circuit divides the first voltage and adjusts the temperature coefficient of the correction voltage signal by changing a divisional ratio of the first voltage, wherein the correction circuit includes: a first impedance conversion circuit configured to perform impedance conversion of the reference voltage and output a converted voltage; a dividing circuit configured to divide the converted voltage output from the first impedance conversion circuit to change a divisional ratio; and a second impedance conversion circuit configured to perform impedance conversion of the output voltage of the dividing circuit and output a converted voltage.