| 摘要 |
PURPOSE:To accurately decide a level between edge signals by generating one edge signal with a wide pulse width in one cycle among prescribed cycles at the leading of an original signal and deciding the level between the edge signals. CONSTITUTION:A time constant at the point of time of leading of a pulse train signal (a) is a time constant determined by a parallel resistor of resistors 2(R1), 3(R2) and a capacitor 4, and the resistor R1 is selected far larger than the resistor R2 and then the R1 is disregarded, the time constant can be R2.C. The pulse width of an output pulse (c) of an exclusive OR circuit 5 ORing exclusively signals (a), (b) differs depending on the leading and trailing of the pulse train signal, the pulse width t2 is at the leading and wider than the pulse width at the trailing. Then the level between the edge signal, that is, the transmission signals (c) is decided accurately. |
