Patent ID: 7642875

Claim:
A temperature correcting apparatus comprising: a storing unit for storing correcting data for individual temperatures in correspondence with addresses representing the individual temperatures, the correcting data for an individual temperature being generated by dividing an actually measured waveform of correcting voltages, which are required by an apparatus to be corrected at the individual temperatures, by a positive integer multiple of a minimum resolution of a D/A converter to obtain times corresponding to voltage digital values representing voltage values at individual dividing points of the actually measured waveform, and generating a plurality of the corresponding times; a temperature sensor for detecting an ambient temperature of the apparatus to be corrected and producing a detection voltage; an A/D converter for A/D converting the detection voltage to a detection address representing the temperature; a processor for reading out correcting data from said storing unit according to the detection address, extracting or calculating the times corresponding to the voltage digital values from the correcting data, and for sequentially outputting the voltage digital values corresponding to the times, in synchronization with the times; and a D/A converter for generating correcting voltages to be supplied to said apparatus to be corrected by performing D/A conversion of the voltage digital values output.