Patent ID: 6337603
Filing Date: 2002-01-08
Classification: H03B

Abstract:
A temperature detector circuit having a function for restricting an occurrence of an output error caused by dispersion in element manufacture comprising:an analog signal generator circuit configured to generate an analog signal which changes according to an atmospheric temperature; an AD converter circuit configured to receive the analog signal and convert the analog signal into digital data to be output; a data storage circuit configured to store correction data in advance according to digital data obtained by the AD converter circuit under a known arbitrary temperature condition and read the stored correction data; and a calculating circuit configured to receive digital data obtained by the AD converter circuit under an unknown temperature condition and the correction data read from the data storage circuit, and output digital data corrected by performing calculating between these data, wherein the AD converter circuit outputs the digital data so that the digital data changes linearly in units of one bit every time an atmospheric temperature changes by 1Â° C., and the calculating circuit executes a calculation of Saâˆ’(Taâˆ’Tk)âˆ’Sk to obtain the correction data where, under a known arbitrary temperature condition, the digital data output from the AD converter circuit is defined as Sa; an expected value of digital data output from the AD converter circuit at a reference temperature is defined as Sk; the known arbitrary temperature is defined as Ta; and the reference temperature is defined as Tk.