| 摘要 |
PURPOSE:To obtain an analog watch with lighting of high dignity by causing no hinderance to motor operation by letting a lamp goes off while an output current is flowing from a circuit to the motor and for a constant period before and after it. CONSTITUTION:An oscillation signal generated by crystal vibration 1 is divided 2 and FF3 is supplied with a signal of 1/2Hz. Further, FF3 is supplied with a signal of 1kHz from circuit 2 and output signal Q3 of FF3 is delayed by 1ms. Then, FF4 is supplied with an output signal from FF3 and a signal of 128Hz from circuit 2, and the output signal of FF4 is delayed behind the output signal of FF# by 6.8ms. Next, FF5 is supplied with the output signal of FF and a signal of 1kHz from circuit 2, and the output signal of FF5 lags the output signal of FF4 by 1ms. Here, an output signal of 6.8ms is obtained from gate 18 by inputting output signals Q3 and Q4 of FF3 and FF4 to AND gate 18 and the obtained signal is used as a motor operating signal. Namely, the lamp is permitted to go off for 8.8ms including 1ms before and after the operation of the motor. |
