| 摘要 |
PURPOSE:To prevent the occurrence of abnormal operation and malfunction of the watch circuit by changing over a switch circuit through control circuit at the use of large current and applying the boosting voltage to the specified parts of the watch circuit. CONSTITUTION:When a driver circuit 9 for lamp and speaker is controlled by way of a control circuit 4, large current flows from battery to the circuit 9 and the lamp 10 and speaker 11 are driven. At the same time, a switch circuit 7 is changed over by the control signal of the circuit 4, and the voltage having been boosted by a boosting circuit 8 is applied to an oscillation circuit 1 for watch, frequency dividing circuit 2, counter 3 and control circuit 4. Hence, even at the drop of the battery voltage owing to the use of large current, the occurrence of malfunctions such as abnormal operation, stoppage, etc. of the watch circuit is prevented. |
