Resistor不單獨用于(yu)芯(xin)片(pian)的(de)ESD保(bao)護(hu)，它往(wang)往(wang)用于(yu)輔助(zhu)的(de)ESD保(bao)護(hu)，如芯(xin)片(pian)Input級保(bao)護(hu)和第二(er)級保(bao)護(hu)之間的(de)限流電(dian)(dian)(dian)(dian)阻。當(dang)ESD電(dian)(dian)(dian)(dian)流過(guo)大，級ESD器件難以將電(dian)(dian)(dian)(dian)壓鉗位至安全區域時(shi)，第二(er)級ESD器件的(de)導通(tong)將使其(qi)與電(dian)(dian)(dian)(dian)阻分壓，從而進(jin)一步降(jiang)低進(jin)入內部(bu)電(dian)(dian)(dian)(dian)路的(de)電(dian)(dian)(dian)(dian)壓。又如用于(yu)GG-NMOS的(de)柵(zha)電(dian)(dian)(dian)(dian)阻，如圖6所示，NMOS的(de)柵(zha)極通(tong)過(guo)一電(dian)(dian)(dian)(dian)阻接(jie)(jie)地，而非直接(jie)(jie)接(jie)(jie)地。如此一來，在(zai)NMOS漏端發生正向的(de)ESD脈沖時(shi)，由(you)于(yu)NMOS的(de)漏一柵(zha)電(dian)(dian)(dian)(dian)容，會使得器件的(de)柵(zha)極耦(ou)合出一正的(de)電(dian)(dian)(dian)(dian)勢，該(gai)電(dian)(dian)(dian)(dian)勢會促使NMOS的(de)溝道開啟(qi)，從而起到(dao)降(jiang)低NMOS在(zai)ESD應(ying)力下觸發電(dian)(dian)(dian)(dian)壓的(de)目的(de)。ESD靜電(dian)(dian)(dian)(dian)保(bao)護(hu)元件可提供多種封裝形式。耳機(ji)接(jie)(jie)口ESD保(bao)護(hu)元件選型

國際電(dian)(dian)(dian)(dian)工(gong)委員(yuan)會(Internationa1日ectrotechnicalCommission，IEC)制定(ding)了測(ce)(ce)試標(biao)(biao)準(zhun)IEC61000-4-2來評價電(dian)(dian)(dian)(dian)子設備的(de)(de)ESD抗擾(rao)度(du)等(deng)級。但人(ren)們(men)在研究靜電(dian)(dian)(dian)(dian)放(fang)電(dian)(dian)(dian)(dian)的(de)(de)危害時，主要關心的(de)(de)是(shi)靜電(dian)(dian)(dian)(dian)放(fang)電(dian)(dian)(dian)(dian)產生的(de)(de)注入電(dian)(dian)(dian)(dian)流對電(dian)(dian)(dian)(dian)火工(gong)品、電(dian)(dian)(dian)(dian)子器(qi)件、電(dian)(dian)(dian)(dian)子設備及其他(ta)一些靜電(dian)(dian)(dian)(dian)敏感系(xi)統的(de)(de)危害，忽視了靜電(dian)(dian)(dian)(dian)放(fang)電(dian)(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)(dian)磁脈沖效應，直(zhi)到20世紀90年代初Wilson才提(ti)出ESD過程中產生的(de)(de)輻射(she)場(chang)影響。IEC61000-4-2標(biao)(biao)準(zhun)雖幾經修(xiu)改，規范了ESD模(mo)擬(ni)器(qi)對水平耦(ou)(ou)合(he)板(ban)(ban)和(he)垂直(zhi)耦(ou)(ou)合(he)板(ban)(ban)的(de)(de)放(fang)電(dian)(dian)(dian)(dian)方式，但沒有(you)關于ESD輻射(she)場(chang)的(de)(de)明確規定(ding)，對ESD模(mo)擬(ni)器(qi)也規定(ding)了放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流的(de)(de)典型波形(xing)和(he)4個關鍵點參(can)數。通(tong)常被測(ce)(ce)設備(equip—mentundertest，EUT)是(shi)易(yi)受電(dian)(dian)(dian)(dian)磁場(chang)影響的(de)(de)。許(xu)多學者在實際測(ce)(ce)試時發現，由(you)于ESD模(mo)擬(ni)器(qi)內部(bu)繼電(dian)(dian)(dian)(dian)器(qi)與接地回路等(deng)因素的(de)(de)影響，符合(he)IEC61000-4-2標(biao)(biao)準(zhun)要求的(de)(de)不同END模(mo)擬(ni)器(qi)所得測(ce)(ce)試結果并不相同。江蘇耳(er)機接口ESD保護元(yuan)件原理ESD靜電(dian)(dian)(dian)(dian)保護元(yuan)件具有(you)單向(xiang)和(he)雙向(xiang)之分。

ESD防(fang)護電(dian)(dian)(dian)(dian)路(lu)主(zhu)要采用“過(guo)壓(ya)防(fang)護”的(de)(de)(de)(de)(de)原(yuan)理(li)，通過(guo)隔離(li)電(dian)(dian)(dian)(dian)路(lu)、箝(qian)位(限幅(fu))電(dian)(dian)(dian)(dian)路(lu)、衰減電(dian)(dian)(dian)(dian)路(lu)、濾波電(dian)(dian)(dian)(dian)路(lu)等降低(di)ESD沖(chong)擊電(dian)(dian)(dian)(dian)壓(ya)、限制脈沖(chong)電(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)(de)大小(xiao)，使其(qi)降低(di)到被保護器件(jian)可(ke)以承受的(de)(de)(de)(de)(de)程度(du)(du)(du)。ESD脈沖(chong)頻譜(pu)的(de)(de)(de)(de)(de)高(gao)(gao)頻信號特(te)(te)征和高(gao)(gao)頻電(dian)(dian)(dian)(dian)路(lu)分(fen)布(bu)參數的(de)(de)(de)(de)(de)嚴格約束(shu)使得在(zai)高(gao)(gao)頻電(dian)(dian)(dian)(dian)路(lu)中防(fang)護器件(jian)的(de)(de)(de)(de)(de)可(ke)選擇(ze)性很(hen)小(xiao)，在(zai)高(gao)(gao)頻電(dian)(dian)(dian)(dian)路(lu)中進行ESD防(fang)護設計(ji)的(de)(de)(de)(de)(de)難度(du)(du)(du)增(zeng)火。ESD脈沖(chong)具有(you)持續時(shi)間短(ns~數百(bai)(bai)ns級)，能(neng)量較低(di)(微(wei)焦耳級)的(de)(de)(de)(de)(de)特(te)(te)征，頻譜(pu)分(fen)布(bu)在(zai)數百(bai)(bai)KHz到數GHz的(de)(de)(de)(de)(de)范(fan)圍(wei)，其(qi)能(neng)量主(zhu)要集中在(zai)數MHz到數百(bai)(bai)MHz的(de)(de)(de)(de)(de)范(fan)圍(wei)內，由(you)于ESD的(de)(de)(de)(de)(de)高(gao)(gao)頻、快速放電(dian)(dian)(dian)(dian)特(te)(te)性，其(qi)防(fang)護電(dian)(dian)(dian)(dian)路(lu)要求比(bi)一般的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)浪(lang)涌(yong)防(fang)護電(dian)(dian)(dian)(dian)路(lu)具有(you)更快的(de)(de)(de)(de)(de)響應(ying)速度(du)(du)(du)和良好的(de)(de)(de)(de)(de)高(gao)(gao)頻性能(neng)。

ESD是(shi)一(yi)種常(chang)見(jian)(jian)的(de)近場(chang)危害源(yuan)，可形成(cheng)高電(dian)(dian)(dian)(dian)(dian)壓，強電(dian)(dian)(dian)(dian)(dian)場(chang)，瞬時(shi)大電(dian)(dian)(dian)(dian)(dian)流(liu)，并伴有(you)強電(dian)(dian)(dian)(dian)(dian)磁輻(fu)射(she)，形成(cheng)靜電(dian)(dian)(dian)(dian)(dian)放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)磁脈沖(chong)。·電(dian)(dian)(dian)(dian)(dian)流(liu)>1A，·上升時(shi)間～15ns，衰減時(shi)間～150ns。ESD靜電(dian)(dian)(dian)(dian)(dian)放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)的(de)特點：靜電(dian)(dian)(dian)(dian)(dian)起(qi)電(dian)(dian)(dian)(dian)(dian)的(de)常(chang)見(jian)(jian)原(yuan)因(yin)是(shi)兩(liang)種材料的(de)接觸和分(fen)離(li)。經常(chang)發生的(de)靜電(dian)(dian)(dian)(dian)(dian)起(qi)電(dian)(dian)(dian)(dian)(dian)現象(xiang)是(shi)固體間的(de)摩擦起(qi)電(dian)(dian)(dian)(dian)(dian)現象(xiang)。此外還有(you)剝(bo)離(li)起(qi)電(dian)(dian)(dian)(dian)(dian)、破裂起(qi)電(dian)(dian)(dian)(dian)(dian)、電(dian)(dian)(dian)(dian)(dian)解(jie)起(qi)電(dian)(dian)(dian)(dian)(dian)、壓電(dian)(dian)(dian)(dian)(dian)起(qi)電(dian)(dian)(dian)(dian)(dian)、熱電(dian)(dian)(dian)(dian)(dian)起(qi)電(dian)(dian)(dian)(dian)(dian)、感應起(qi)電(dian)(dian)(dian)(dian)(dian)、吸附起(qi)電(dian)(dian)(dian)(dian)(dian)和噴(pen)電(dian)(dian)(dian)(dian)(dian)起(qi)電(dian)(dian)(dian)(dian)(dian)等(deng)(deng)。物體的(de)靜電(dian)(dian)(dian)(dian)(dian)起(qi)電(dian)(dian)(dian)(dian)(dian)—放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)一(yi)般具有(you)高電(dian)(dian)(dian)(dian)(dian)位、強電(dian)(dian)(dian)(dian)(dian)場(chang)和寬帶電(dian)(dian)(dian)(dian)(dian)磁干擾等(deng)(deng)特點。硅基ESD靜電(dian)(dian)(dian)(dian)(dian)保護元件具有(you)較低的(de)鉗(qian)位電(dian)(dian)(dian)(dian)(dian)壓。

人體放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)模(mo)型(xing)(xing)(xing)(xing)（HBM）是靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)（ESD）模(mo)型(xing)(xing)(xing)(xing)的一(yi)種，是分析(xi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子元(yuan)(yuan)(yuan)件(jian)對靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)耐受性特性時，常使用(yong)(yong)的模(mo)型(xing)(xing)(xing)(xing)。人體放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)模(mo)型(xing)(xing)(xing)(xing)是模(mo)擬帶有靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的人碰到電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子元(yuan)(yuan)(yuan)件(jian)時，在(zai)幾百納(na)秒（ns）的時間(jian)內產生數安培的瞬間(jian)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。對2千伏的ESD放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓而言，其瞬間(jian)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的尖峰值大(da)約是1.33安培。1.HBM：HumanBodyModel，人體模(mo)型(xing)(xing)(xing)(xing)：該模(mo)型(xing)(xing)(xing)(xing)表征人體帶電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)接觸器(qi)件(jian)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，Rb為(wei)等(deng)效(xiao)人體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻，Cb為(wei)等(deng)效(xiao)人體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容。等(deng)效(xiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路如(ru)下圖(tu)。圖(tu)中同時給出了器(qi)件(jian)HBM模(mo)型(xing)(xing)(xing)(xing)的ESD等(deng)級。ESD靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)保護(hu)元(yuan)(yuan)(yuan)件(jian)一(yi)般并聯在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)中使用(yong)(yong)。耳機接口ESD保護(hu)元(yuan)(yuan)(yuan)件(jian)選型(xing)(xing)(xing)(xing)

多層(ceng)壓(ya)敏(min)電(dian)(dian)阻作為ESD靜電(dian)(dian)保護(hu)元件，具有較高的成本優(you)勢。耳機接(jie)口ESD保護(hu)元件選(xuan)型

降(jiang)低防(fang)護(hu)器件結(jie)電(dian)(dian)(dian)(dian)容(rong)的(de)(de)設計(ji)方(fang)(fang)法(fa)(fa)當(dang)(dang)防(fang)護(hu)器件的(de)(de)并(bing)聯(lian)(lian)結(jie)電(dian)(dian)(dian)(dian)容(rong)較大時，將對(dui)高(gao)(gao)頻(pin)(pin)信(xin)號產生“衰耗”作(zuo)用，此(ci)時需(xu)要改進防(fang)護(hu)電(dian)(dian)(dian)(dian)路的(de)(de)設計(ji)，降(jiang)低結(jie)電(dian)(dian)(dian)(dian)容(rong)對(dui)信(xin)號質量的(de)(de)影響(xiang)。常(chang)用的(de)(de)設計(ji)方(fang)(fang)法(fa)(fa)有;A二極(ji)管(guan)(guan)(guan)偏(pian)置法(fa)(fa)二極(ji)管(guan)(guan)(guan)結(jie)電(dian)(dian)(dian)(dian)容(rong)隨(sui)反向偏(pian)升(sheng)高(gao)(gao)而降(jiang)低，對(dui)防(fang)護(hu)一極(ji)管(guan)(guan)(guan)施加話當(dang)(dang)的(de)(de)反向偏(pian)壓可(ke)適(shi)用更(geng)高(gao)(gao)頻(pin)(pin)率(lv)電(dian)(dian)(dian)(dian)路。B.二極(ji)管(guan)(guan)(guan)串(chuan)(chuan)聯(lian)(lian)法(fa)(fa)一-兩(liang)個相同防(fang)護(hu)二極(ji)管(guan)(guan)(guan)串(chuan)(chuan)聯(lian)(lian)可(ke)使接(jie)入(ru)電(dian)(dian)(dian)(dian)容(rong)減小(xiao)一半。C阻抗(kang)匹配(pei)法(fa)(fa)一-當(dang)(dang)防(fang)護(hu)二極(ji)管(guan)(guan)(guan)的(de)(de)結(jie)電(dian)(dian)(dian)(dian)容(rong)太大，可(ke)以(yi)對(dui)防(fang)護(hu)器件并(bing)聯(lian)(lian)小(xiao)電(dian)(dian)(dian)(dian)感，使之和二極(ji)管(guan)(guan)(guan)結(jie)電(dian)(dian)(dian)(dian)容(rong)并(bing)聯(lian)(lian)諧振在工作(zuo)信(xin)號頻(pin)(pin)率(lv)點，這時保護(hu)電(dian)(dian)(dian)(dian)路對(dui)工作(zuo)頻(pin)(pin)率(lv)呈高(gao)(gao)阻抗(kang)，從(cong)而減小(xiao)對(dui)高(gao)(gao)頻(pin)(pin)電(dian)(dian)(dian)(dian)路四配(pei)的(de)(de)影響(xiang)，并(bing)有利于加強防(fang)護(hu)。耳(er)機接(jie)口ESD保護(hu)元件選(xuan)型

上海來(lai)明電(dian)(dian)子(zi)有(you)限公(gong)司是以TVS、ESD、MOV，放電(dian)(dian)管(guan)(guan)(guan)、保險(xian)絲(si)、繼電(dian)(dian)器(qi)(qi)(qi)，二三(san)極管(guan)(guan)(guan)MOS管(guan)(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)容研發、生產(chan)、銷(xiao)售(shou)、服(fu)(fu)務為(wei)一體(ti)的(de)一般項目(mu)(mu): 電(dian)(dian)子(zi)產(chan)品(pin)(pin)、電(dian)(dian)子(zi)元(yuan)器(qi)(qi)(qi)件、電(dian)(dian)動工具(ju)、機電(dian)(dian)設(she)備、儀器(qi)(qi)(qi)儀表、通訊(xun)器(qi)(qi)(qi)材(cai)(cai)(除衛星電(dian)(dian)視廣(guang)播地(di)(di)面(mian)接(jie)收設(she)施)、音(yin)響設(she)備及(ji)器(qi)(qi)(qi)材(cai)(cai)、金屬材(cai)(cai)料、日用(yong)百貨的(de)銷(xiao)售(shou)，電(dian)(dian)子(zi)元(yuan)器(qi)(qi)(qi)件的(de)制(zhi)造。加工(以上限分(fen)支機構經營(ying)(ying)(ying))。(除依法須經批(pi)準(zhun)(zhun)(zhun)的(de)項目(mu)(mu)外。憑營(ying)(ying)(ying)業(ye)(ye)執照依法自主(zhu)開展經營(ying)(ying)(ying)活動)許(xu)可項目(mu)(mu): 貨物進出口;技(ji)術進出口:進出口代理。(依法須經批(pi)準(zhun)(zhun)(zhun)的(de)項目(mu)(mu)，經相關部門批(pi)準(zhun)(zhun)(zhun)后方可開展經營(ying)(ying)(ying)活動，具(ju)體(ti)經營(ying)(ying)(ying)項目(mu)(mu)以相關部門批(pi)準(zhun)(zhun)(zhun)文件或許(xu)可證件為(wei)準(zhun)(zhun)(zhun))企業(ye)(ye)，公(gong)司成立(li)于(yu)2010-08-11，地(di)(di)址在(zai)靈山路(lu)1000弄2號808。至創始至今，公(gong)司已經頗(po)有(you)規(gui)模(mo)。公(gong)司具(ju)有(you)TVS、ESD、MOV，放電(dian)(dian)管(guan)(guan)(guan)、保險(xian)絲(si)、繼電(dian)(dian)器(qi)(qi)(qi)，二三(san)極管(guan)(guan)(guan)MOS管(guan)(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)容等多(duo)種產(chan)品(pin)(pin)，根據(ju)(ju)客(ke)戶(hu)(hu)不同(tong)的(de)需求，提(ti)(ti)供(gong)不同(tong)類型的(de)產(chan)品(pin)(pin)。公(gong)司擁有(you)一批(pi)熱情敬業(ye)(ye)、經驗(yan)豐(feng)富(fu)的(de)服(fu)(fu)務團隊，為(wei)客(ke)戶(hu)(hu)提(ti)(ti)供(gong)服(fu)(fu)務。晶導微電(dian)(dian)子(zi),意(yi)昇,美碩,成鎬集中了一批(pi)經驗(yan)豐(feng)富(fu)的(de)技(ji)術及(ji)管(guan)(guan)(guan)理專業(ye)(ye)人才(cai)，能為(wei)客(ke)戶(hu)(hu)提(ti)(ti)供(gong)良(liang)好(hao)的(de)售(shou)前(qian)、售(shou)中及(ji)售(shou)后服(fu)(fu)務，并能根據(ju)(ju)用(yong)戶(hu)(hu)需求，定制(zhi)產(chan)品(pin)(pin)和配套整(zheng)體(ti)解決方案。我(wo)們本著(zhu)客(ke)戶(hu)(hu)滿意(yi)的(de)原則為(wei)客(ke)戶(hu)(hu)提(ti)(ti)供(gong)TVS、ESD、MOV，放電(dian)(dian)管(guan)(guan)(guan)、保險(xian)絲(si)、繼電(dian)(dian)器(qi)(qi)(qi)，二三(san)極管(guan)(guan)(guan)MOS管(guan)(guan)(guan)、晶振(zhen)，NTC，PPTC，電(dian)(dian)容產(chan)品(pin)(pin)售(shou)前(qian)服(fu)(fu)務，為(wei)客(ke)戶(hu)(hu)提(ti)(ti)供(gong)周到的(de)售(shou)后服(fu)(fu)務。價(jia)格低廉優(you)惠，服(fu)(fu)務周到，歡(huan)迎您的(de)來(lai)電(dian)(dian)！

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