| 摘要 |
PROBLEM TO BE SOLVED: To enable high-speed continuous operation by shortening waiting time until restarting a pulse delay circuit in a TAD-type A/D conversion circuit, and further to enable high-speed continuous operation and to reduce a circuit size simultaneously. SOLUTION: Every time when A/D conversion is executed, a pause is inserted for initializing a pulse delay circuit 10 and a round number counter 13, thus enabling numerical data outputted by a latch & encoder 11 and a latch circuit 14 to be used as A/D-converted data as they are. A control signal generation circuit 15 generates a counter initialization signal RC for initializing a start control signal RR for controlling the start/pause of the pulse delay circuit 10, and the round number counter 13. The control signal generation circuit 15 comprises an edge detection circuit composed of a delay circuit 16 and logic circuits 17-19, and can set a pause that is shorter than the period of a sampling block CKS, thus achieving high-speed continuous operation. COPYRIGHT: (C)2007,JPO&INPIT
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