Temperature measurement apparatus

A temperature measurement apparatus comprising:

• a temperature sensitive device;
• an electric circuit for producing output signals responding to electrical states of said temperature sensitive device;
• a reference resistor of a known temperature coefficient which is connected in said electric circuit to produce a reference output signal at a predetermined reference environmental temperature and at a reference voltage of a power source;
• a memory for memorizing said reference output signal;
• a control circuit for alternatively switching to produce output signals for said temperature sensitive device and for said reference resistor;
• and
• a calibration circuit for calibrating a measurement error due to variation from said environmental temperature and a power source voltage by use of said memorized reference output signal and said output signals for said temperature sensitive device and said reference resistor,
• said calibration circuit for performing an arithmetic calculation ##EQU10## where Vc.sub.O is said reference output signal, Vc and Vm are said output signals for said reference resistor and said temperature sensitive device, respectively, and 1+f(T) represents a function representing thermal characteristics of said temperature sensitive device at a temperature T normalized with respect to said reference temperature.