描述

同步時(shí)序電路的延遲。同步時(shí)序電路的延遲最常用的設(shè)計(jì)方法是用分頻或者倍頻的時(shí)鐘或者同步計(jì)數(shù)器完成所需的延遲，對(duì)比較大的和特殊定時(shí)要求的延時(shí)，一般用高速時(shí)鐘產(chǎn)生一個(gè)計(jì)數(shù)器，根據(jù)計(jì)數(shù)產(chǎn)生延遲；對(duì)于比較小的延遲，可以用D觸發(fā)器打一下，這樣不僅可以使信號(hào)延時(shí)了一個(gè)時(shí)鐘周期，而且完成了信號(hào)與時(shí)鐘的初次同步。在輸入信號(hào)采樣和增加時(shí)序約束余量中使用。另外，還有用行為級(jí)方法描述延遲，如“#5 a<=4’0101;”這種常用于仿真測(cè)試激勵(lì)，但是在電路綜合時(shí)會(huì)被忽略，并不能起到延遲作用。 產(chǎn)品廣泛應(yīng)用于：電力、石油、礦井提升、港口、供熱、燃?xì)狻⒐┧?、污水處理、冶金、造紙、紡織、化工、水利等現(xiàn)代化工業(yè)領(lǐng)域！ 我們這里有您急需的停產(chǎn)備件， 優(yōu)勢(shì)現(xiàn)貨，詢(xún)不到的，買(mǎi)不到的，請(qǐng)聯(lián)系我們！ 絕 對(duì)優(yōu)勢(shì)，絕 對(duì)低價(jià)！絕 對(duì)正品，優(yōu)質(zhì)的產(chǎn)品，一流的服務(wù)，充足的庫(kù)存， 歡迎來(lái)電詢(xún)價(jià)，我們將會(huì)給您最優(yōu)惠的價(jià)格！ 主營(yíng)：世界知名品牌的PLC、DCS系統(tǒng)備件模塊 ①Allen-Bradley(美國(guó)AB)系列產(chǎn)品》 ②Schneider(施耐德電氣)系列產(chǎn)品》 ③General electric(通用電氣)系列產(chǎn)品》 ④Westinghouse（美國(guó)西屋）系列產(chǎn)品》 ⑤SIEMENS(西門(mén)子系列產(chǎn)品)》 ⑥銷(xiāo)售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。 ⑦estinghouse（西屋）：OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。 ⑧Invensys Foxboro（?？怂共_）：I/A Series系統(tǒng)，F(xiàn)BM（現(xiàn)場(chǎng)輸入/輸出模塊） 順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù) 據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余（TMR） 結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。 ⑨Siemens(西門(mén)子)：Siemens MOORE，Siemens Simatic C1，Siemens數(shù)控系統(tǒng)等。 ⑩Bosch Rexroth（博世力士樂(lè)）：Indramat，I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。 ◆Motorola（摩托羅拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。 LegacyVoicemail?.com Nortel DSE-N DNIC LC 2410-0244-01 The Centigram Store Enlarge Nortel NTNQ37AA 2 Port 100Base Ethernet Next Generation Nortel NTNQ64AA FP Wireless Packet Data Server Card Nortel NTNQ65AA 2 Port OC3M FP Nortel Passport DS1333004 2-Port OC3 SMF MDA for 8683 90 Day Warranty-Free Shipping! 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