在FPGA或CPLD上实现的一中非常实用的倍频电路，只要输入频率高，精度就很高-the CPLD or FPGA to achieve a very practical frequency circuit, as long as the input frequency, on the high precision
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002077s ]
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SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002384s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002167s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002091s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002543s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 167487 [ RunTime:0.001299s ]
