| 摘要 |
PROBLEM TO BE SOLVED: To provide an ACC circuit capable of correctly detecting a burst level of an input burst signal even when the input burst signal is sampled by a clock with an optional period asynchronously locked to the input burst signal. SOLUTION: The ACC circuit is provided with: two latch circuits 11, 12 for latching input burst data; a magnitude discrimination circuit 15 for discriminating the magnitude correlation of captured data; a division circuit 16; a first conversion table circuit 17 for multiplying a multiple depending on a period of a clock used to quantize a burst signal and a division result of the division circuit 16 with the data which are greater and providing an output; a second conversion table circuit 18 for multiplying a multiplication coefficient with an output of the first conversion table circuit 17 so that the output reaches a prescribed level; a latch integral circuit 19 for latching data subjected to integral-averaging an output of the second conversion table circuit 18 over prescribed lines; and a multiplier 9 whose gain is controlled by an output of the latch integral circuit 19 so as to bring a final output to have a prescribed level. COPYRIGHT: (C)2004,JPO&NCIPI
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