| 摘要 |
PROBLEM TO BE SOLVED: To provide an analogue electronic timepiece which does not malfunction in a crystal-oscillator circuit even when a battery voltage drops in a loaded state of a motor.SOLUTION: An analogue electronic timepiece includes: a crystal oscillator; an oscillation circuit; a divider circuit; an output control circuit for generating a drive pulse of an external motor; a constant voltage circuit; and a battery. The constant voltage circuit and the output control circuit are supplied with power from the battery, the oscillation circuit and the divider circuit are supplied with power from the constant voltage circuit, and the output of the constant voltage circuit can be switched to a first constant voltage and a second constant voltage. The first constant voltage is a voltage smaller in absolute value than the battery voltage, and the second constant voltage is a voltage lower than or equal to the battery voltage and is a voltage larger in absolute value than the first constant voltage. On normal oscillation time, a constant voltage is the first constant voltage, and switches the constant voltage to the second constant voltage in a period when the motor drive pulse is outputted. |
