| 摘要 |
PURPOSE:To perform accurate detection by making compensation as much as the influence of interference between codes in a digital signal detector which uses a counter. CONSTITUTION:An input signal from an input Xin is compared with a reference potential Vc by a comparator 11 and sampled by pulses 12 at an AND gate 13. Its sampled signal is counted by a counter 14, whose output is compared with the value of a comparison criterion circuit 20 by a comparator 17 to obtain a digital detection output through a DFF18. The value of the comparison criterion circuit 20 is large when outputs X8 and X9 are both ''1'', small when ''0'' is inputted to the input Xin, and a little lower when ''0'' is inputted to the output X8 and ''1'' is inputted to the output X9 respectively. |
