| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a digital noise removing system for removing noise pulses of small widths. <P>SOLUTION: The digital noise removing system 10 comprises: a delay circuit 11 provided between a signal input terminal T1 and a signal output terminal T2; a bias transformation circuit 12 connected to the delay circuit 11; and a phase synchronous circuit 13 connected to the bias transformation circuit 12. The bias transformation circuit 12 has a function adjusting the value of a control signal from the phase synchronous circuit 13, for example, like a current mirror circuit. The phase synchronous circuit 13 comprises: a phase comparator 14 connected to a reference signal-inputted terminal BT1; a low-pass filter 15; a delay circuit 16; and a divider 17. The output section of the delay circuit 16 is fed-back to the input section of the delay circuit 16. In addition, the delay circuit 16 is connected to the output section of the low-pass filter 15 and receives the control signal for delay time from the output section of the low-pass filter 15. <P>COPYRIGHT: (C)2004,JPO |
