| 摘要 |
<p>PURPOSE:To simplify the formation of an IC and at the same time prevent the malfunction caused by the noise, by excluding the time constant circuit using a capacitor when the nonsignal part of a recording tape is detected automatically. CONSTITUTION:The periodical hold signal (g) and the periodical reset signal (i) are delivered by the period reset means 6-10 and in accordance with the speed of tape, and the pulse signal (d) is obtained according to the contents of recording of the travelling and recorded tape. Then the periodical reset signal (i) is obtained. After this, the pulse signal (d) of the desired number N by counting the signals (d), and the carry signal (e) is delivered by the counters 1-5. The hold signal (g) is supplied, and the presence or absence is held for the signal (e) immediately before the holding period of the signal (g) within this period. And this state of holding is delivered in the form of the detection signal (j) of the nonsignal part of the recording tape. The presence of absence of the signal (e) is delivered directly by the latch means 11 outside the above-mentioned period.</p> |
