Electronic alarm timepiece with alarm repetition button - uses voltage supplied to alarm buzzer to activate repetition circuit

摘要

A repetition button allows the alarm signal to be repeated after a defined interval, with integrated circuit element of the timepiece incorporating the repetition circuit and the alarm circuit. The input terminal for the repetition circuit and the output terminal of the alarm circuit are electrically connected to one another via the repetition switch, with the output voltage across the alarm circuit being greater or equal to the threshold voltage of the repetition circuit. Pref. the acoustic alarm signal is provided by a buzzer coupled to the output terminal of the alarm circuit. The repetition button closes the repetition switch between the output of the alarm circuit and the input of the repetition circuit, so that a pulse can be supplied from the alarm circuit to the repetition circuit, so that the latter is activated when the first alarm signal is given. This means that a separate pulse circuit for the repetition circuit is not required.