| 摘要 |
PURPOSE:To provide an electronic watch which operates highly accurately even in environments of drastically changing temperature differences by making selective use of crystal vibrators for high temperature and low temperature. CONSTITUTION:When a switch is closed according to ambient temperatures, a crystal vibrator Q2 for high temperature is changed over to a crystal vibrator Q1 for low temperature via switch circuit 2 and is connected to an oscillation circuit 1, thus the watch operates highly accurately even in enviroments of drastically changing temperature differences. |
