| 摘要 |
PURPOSE:To enable to apply the circuit to wrist watches, by ensuring the time casting pattern recognition and increase the noise proof performance, through the measurement of the width and intervals of the burst signal constituting the time casting pattern. CONSTITUTION:When the input signal a is incoming, FF1 is set and the clock of a given period is delivered from the oscillator 4, it is counted 5 and the burst discrimination operation is made with the count output for controlled FF1, FF2. Further, when the burst is discriminated, pulses are counted 9 for a given period to stop the burst discriminating function for a given period corresponding to the burst interval of the time casting pattern with the count output. Further, at the period corresponding to the burst interval, the input signal a is counted 16 and the delivery of clock is stopped when the count more than a given value is made. Further, the burst signal is counted 18 in response to the output of the counter 9 to output a given control signal. |
