| 摘要 |
PURPOSE:To enable the yielding of an accurate alarming effect by varying the intensity of sound emission cyclically with attenuation while doing so changing the attenuation cycle and the sound emission cycle with the proceding of an alarm action. CONSTITUTION:An electronic alarm time piece includes a reference signal generator 10 such as quartz oscillator, a division circuit 12 for a signal thereof, a waveform shaping circuit 14, a driving circuit 16 and a time piece synchronous motor 18 and the driving force of the motor 18 is transmitted to a wheel train 20 with a time pointer fixed thereon. A time piece device is provided with an alarm ON-OFF switch 22 and an alarm switch 24. To obtain an alarm tone varying in the sound emission cyclically with attenuation, signals outputted from the division circuit 12 are modulated cyclically with attenuation to produce sounds. An attenuation modulating circuit 36 is provided to supply a driving signal for it to a sound emission circuit 30. |
