| 摘要 |
PROBLEM TO BE SOLVED: To enable data synchronization for sure waveform shape without being influenced by a jitter or a glitch with a simple structure by monitoring a position where an edge signal exists in accordance with a second timing signal and outputting a preset signal when the position is in a period of a first timing signal or a period of a neighborhood of the signal. SOLUTION: A start detection part 102 detects a first edge signal from the edge detection part 101 to be outputted after an input signal is supplied and generates a start signal for starting count operation of a counter 104 based on the signal. A synchronous deviation detection part 103 detects whether or not an edge of the input signal exists in a period in which the input signal is sampled when a count value of the counter 104 is a specified value. When it exists, it is regarded that data synchronous deviation occurs, a synchronous deviation detection signal is outputted, this signal is transmitted to the counter 104 and the count value of the counter 104 is preset to a specified value. |
