| 摘要 |
PURPOSE:To facilitate the confirmation of the set state of alarm function while making it possible to certainly performing waking, by constituting a clock constituting part with an alarm and a timer constituting part in a separable and connectable manner while applying chang-over control to the operation and non- operation of the alarm function of the clock constituting part by the separation and connection of both constituting parts. CONSTITUTION:A clock constituting part 4 performes such a function that the high accuracy reference signal of an oscillation circuit 10 such as a quartz oscillation circuit is divided to 1 Hz by a frequency dividing circuit 12 and a pulse capable of driving a clock step motor 20 is alternately applied to a wave form shaping circuit 14 and driving inverters 16a, 16b. A timer constituting part 6 has an oscillation circuit 70, a frequecny dividing circuit 72 and a wave form shaping circuit 74 independently of the clock constituting part and alternately applies a pulse capable of driving a step motor 80 for a timer to a coil by driving inverters 76a, 76b. An alarm operation change-over circuit 50 is formed in the clock constituting part 4 and constituted of an AND gate 52 and an inverter 54 and can change over an input signal to an AND gate 30 to H or L by the closed and open states of a connection contact 60. |
