| 摘要 |
PROBLEM TO BE SOLVED: To simplify a program and to enable many operations even during the reception of signals since an automatic correction clock can be used at a low voltage and needs not be corrected periodically. SOLUTION: The clock generates a signal with a frequency of 4,096 Hz from a clock signal CLKB with a frequency of 32 kHz of a crystal oscillation circuit 13B and supplies it to an alarm generation circuit 1045. The alarm generation circuit 1045 outputs a modulated alarm signal S1045 to an amplifier 20 when an alarm sound is generated, at the same time supplies a drive signal DR3 to a drive circuit 19 and supplies power to the amplifier 20, continuously outputs a signal S1045 with a frequency of 4,096 Hz in the case of the signal reception mode of a standard time electronic wave, generates a sampling signal S1046 with a frequency of 32 Hz from the signal S1045 with a frequency of 4,096 Hz by a timer circuit 1046, and performs sampling by a sampling signal S1046 with a frequency of 32 Hz by the timer circuit 1046 by a reception code judgment circuit 1047 for judging codes. |
