电子工程师自学速成——提高篇-畅读网

　　　　

电子工程师自学速成——提高篇

作者：蔡杏山

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mobi/epub/pdf/awz3

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科学技术 >> 工业技术

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内容简介:

本书为“提高篇”，包括模拟电路和数字电路两大部分，模拟电路部分的内容有电路分析基础、放大电路、放大器、谐振电路、滤波电路、振荡器、调制电路、解调电路、变频电路、反馈控制电路、电源电路和晶闸管电路，数字电路部分的内容有数字电路基础、门电路、数制、编码、逻辑代数、组合逻辑电路、时序逻辑电路、脉冲电路、D/A转换器、A/D转换器和半导体存储器。

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SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.004204s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 45 LIMIT 1 [ RunTime:0.002176s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001743s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.003651s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1762665746 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:1.140839s ]

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