| 摘要 |
PURPOSE:To make two-second hand advance possible in corresponding to time adjustment by varying the output order of motor driving signal for the two- second hand advance in case of a drop in battery voltage. CONSTITUTION:Once a battery voltage detecting circuit 8 detects the drop in battery voltage, its detection signal is passed through a gate means 17 to control switching circuits 10 and 14. A signal from a driving signal generating circuit 18 is switched by the switching circuits 10 and 14 to be outputted as motor driving signals OUT1 and OUT2 through a driving circuit 11. Therefore, the output order of the motor driving signals OUT1 and OUT2 is varied during two-second hand advancing operation according to the operation order of a second-hand stopping circuit 4. Thus, a corresponding even or odd two-second hand advance is made during the time adjustment. |
