| 摘要 |
PURPOSE:To perform stable, wide-range temperature compensation by composing the electronic timepiece of a storage circuit which supplies a corrected value to a temperature information correcting circuit, a logical circuit which generates a primary and a secondary coefficient, etc., for the output data of the temperature information correcting circuit and temperature, and an oscillation circuit and a frequency dividing circuit which performs logical speeding-up and slowing-down operation. CONSTITUTION:The analog output of a temperature detecting circuit 207 is converted into digital information by an A-D converting circuit. An error of the temperature detecting circuit and an error of the A-D converting circuit are added to said information, so it is corrected into digital data as to each integrated circuit chip. This corrected value is written in the storage circuit 202 composed of an EPROM temporarily and the corrected data is stored in a primary and secondary correcting circuit 203 and converted on axial symmetry basis about the peak temperature of crystal, thereby making primary and secondary corrections. The primary correction substitutes the tertiary correction. The high-order 3-4 bits of the obtained biary data are led to the frequency dividing circuit 205 as they are to perform speeding-up and slowing-down operation. |
