| 摘要 |
PURPOSE:To reduce the number of external adjusting terminals and to improve the accuracy of temperature compensation by forming a p-channel FAMOS for holding data in the output adjusting circuit of a temperature sensor and compensating an oscillation part and a frequency dividing part by an adding/ squaring circuit. CONSTITUTION:The temperature sensor 200 is formed in an electronic time piece provided with a reference oscillation circuit 206 and a frequency dividing circuit 207 and the output of the sensor 200 is inputted to a data adjusting circuit 202 through an A/D converter 201. The FAMOS memory circuit 203 consisting of a p-channel transistor 601 is connected to the circuit 202 to store the output value of the temperature sensor 200, compensates the characteristics of the sensor 200 from the change of the stored contents and adjusts the data. The adjusted data are inputted to the adding/squaring circuit 204 to compensate the temperature characteristics of the crystal oscillator and the circuits 206, 207 are controlled through a logical circuit 205. |
