| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly reliable chattering removal circuit of which operations are stabilized. <P>SOLUTION: The chattering removal circuit comprises a synchronous input signal generation part 10 which generates a synchronous input signal synchronized with a reference clock signal on the basis of an input signal from a signal source having probability that a chatter occurs, and the predetermined reference clock signal, an internal clock generation part 30 which generates an internal clock signal of a predetermined term synchronized with the reference clock signal, and a state machine part 40 which generates an intermediate stage signal by sampling the synchronous input signal in timing of an edge part of the reference clock signal when the internal clock signal is a predetermined level, and generates an output signal wherein the influence of chattering is eliminated, on the basis of a sampling result after sampling the intermediate stage signal in the timing of the edge part of the reference clock signal when the internal clock signal is the predetermined level. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
