| 摘要 |
<p>The device includes first and second counters (S; D) the changes of the output data (s1...sn; d1...dn) of which correspond to leading edges (as) and trailing edges (ad) respectively of the signal (A) whose pulses are to be counted, and control devices (FF, M) for detecting the level of the signal (A) when a switching edge (e), which defines the end of the counting period, occurs in a second signal (B). The control devices (FF, M) are adapted to transfer to a memory register (R) the data output by the first counter (S) if the first signal (A) is at a "high" level when the edge occurs in the second signal (B) and the data output by the second counter (D) if the first signal (A) is at a "low" level when the edge occurs in the second signal (B). <IMAGE></p> |
