Patent ID: 6944562

Claim:
A low heat-generating temperature compensation device that allows an optical communication device to have a constant temperature characteristic regardless of change of environmental temperature, the low heat-generating temperature compensation device comprising: a temperature sensor that detects a temperature at which the optical communication device is used; a temperature comparison unit that performs digital signal processing of a signal corresponding to the detected temperature and a signal corresponding to a reference temperature of the optical communication device and then generates a digital error value which represents the difference between the two signals; a D/A converter that converts the digital error value of the temperature comparison unit into an analog signal; a temperature control unit that controls the temperature of the optical communication device on the basis of a temperature compensation signal; an analog PID control unit that receives the analog signal and performs PID control using an analog method to generate the temperature compensation signal so as to urge the digital error value to zero; and a high electric current drive unit, consists of a pulse width modulation driver and a current rectifier, for receiving the temperature compensation signal from the analog PID control unit, amplifying the temperature compensation signal and supplying the temperature compensation signal as high electric current to the temperature control unit.