Abstract
The improvement of the degree of high precision step for the solar watch has been done successfully. Out of which the significantly improved 2 points shall be highlighted as follows. The one is the circuit system to hold a degree of a high precision step in the wide voltage range; not only a regulator, which drives a crystal-controlled oscillator circuit, and a temperature sensor circuit to have done it since before but also you must reduce the influence of the change in the junction capacitance of protection diode of the connection terminal for the crystal vibration. The other is the circuit system which does the slight adjustment of a degree of a step without opening a reverse side cap; the step occasion data changed into the magnetic signal by the outside device are detected by using the coil for the motor, and those data are written in the unvolatility memory.
