| 摘要 |
PURPOSE:To make it possible to detect a transition point automatically and accurately, through the coincidence-discoincidence logic decision of a digital code read ''n'' times at intervals of time. CONSTITUTION:In the transition-point detection circuit for digital codes using D type FFs 421 and 422, digital code S are read into FFs 421 and 422 at intervals of time by read-in pulses T1 and T2 generated by clock pulse generator 1, counter 2 and logical gate 3 (AND gates 31 and 32) and their outputs are supplied to coincidence detection circuit 5, where coincidence between the both is discriminated. When S is in an indefinite area and varies between ''1'' and ''O'' at random, output A of circuit 5 can be regarded as a noise, but waveform B can be obtained through integrating circuit 6. Further, read-in periods of T1 and T2 are equalized nearly to the period of variation in S, thereby obtaining information of a transition point in accuracy. |
