| 摘要 |
PURPOSE:To form a digitized pulse trio detecting circuit, by detecting a three consecutive pulse at the 1st gate circuit and detecting a bipolar violation generated only at the first or last pulse at the 2nd gate circuit. CONSTITUTION:A pulse trio signal is inputted to an input terminal from a bipolar/unipolar converting circuit 10, the three consecutive pulse is outputted to the output of an OR gate 11, and it is transferred sequentially to each stage of a shift register 12. Further, a violation detecting circuit 13 detects the bipolar violation at the 1st pulse position and gives the result of detection to a shift register 15. Since each bit of the shift registers 12 and 15 is ''111'', ''1'' is outputted from both AND gates 16, 18, and then ''1'' is outputted from an AND gate 17 and it is detected at a counter 14. |
