反向(xiang)(xiang)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)按機理分(fen)為齊納(na)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)和雪(xue)(xue)崩擊(ji)(ji)(ji)(ji)(ji)穿(chuan)兩(liang)種(zhong)情(qing)況(kuang)。在高摻(chan)雜濃度(du)(du)的情(qing)況(kuang)下，因勢壘(lei)區寬(kuan)度(du)(du)很小，反向(xiang)(xiang)電(dian)(dian)(dian)(dian)壓較大時，破(po)壞了勢壘(lei)區內共(gong)價(jia)(jia)鍵(jian)結構，使(shi)(shi)價(jia)(jia)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)脫離共(gong)價(jia)(jia)鍵(jian)束縛，產(chan)(chan)生電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)-空穴對，致使(shi)(shi)電(dian)(dian)(dian)(dian)流急(ji)(ji)劇增(zeng)大，這種(zhong)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)稱為齊納(na)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)。如果(guo)摻(chan)雜濃度(du)(du)較低，勢壘(lei)區寬(kuan)度(du)(du)較寬(kuan)，不(bu)容易產(chan)(chan)生齊納(na)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)。雪(xue)(xue)崩擊(ji)(ji)(ji)(ji)(ji)穿(chuan)另一(yi)種(zhong)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)為雪(xue)(xue)崩擊(ji)(ji)(ji)(ji)(ji)穿(chuan)。當反向(xiang)(xiang)電(dian)(dian)(dian)(dian)壓增(zeng)加(jia)(jia)(jia)到(dao)較大數值時，外加(jia)(jia)(jia)電(dian)(dian)(dian)(dian)場使(shi)(shi)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)漂移速度(du)(du)加(jia)(jia)(jia)快，從(cong)而與(yu)共(gong)價(jia)(jia)鍵(jian)中的價(jia)(jia)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)相碰撞，把價(jia)(jia)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)撞出(chu)共(gong)價(jia)(jia)鍵(jian)，產(chan)(chan)生新的電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)-空穴對。新產(chan)(chan)生的電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)-空穴被電(dian)(dian)(dian)(dian)場加(jia)(jia)(jia)速后又撞出(chu)其(qi)它價(jia)(jia)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)，載流子(zi)(zi)(zi)雪(xue)(xue)崩式地(di)增(zeng)加(jia)(jia)(jia)，致使(shi)(shi)電(dian)(dian)(dian)(dian)流急(ji)(ji)劇增(zeng)加(jia)(jia)(jia)，這種(zhong)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)稱為雪(xue)(xue)崩擊(ji)(ji)(ji)(ji)(ji)穿(chuan)。無論哪種(zhong)擊(ji)(ji)(ji)(ji)(ji)穿(chuan)，若對其(qi)電(dian)(dian)(dian)(dian)流不(bu)加(jia)(jia)(jia)限制(zhi)，都(dou)可能造成PN結長久(jiu)性損(sun)壞。重(zhong)慶汽(qi)車電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)TVS二(er)極管廠(chang)家就找成都(dou)長九(jiu)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)科技有限公司。西藏ESD二(er)極管廠(chang)價(jia)(jia)

在使用二(er)極(ji)(ji)管(guan)進(jin)行光(guang)電轉換時，應注(zhu)意(yi)其(qi)響(xiang)應速(su)度和靈敏(min)度的(de)(de)限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)，超過限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)會導(dao)致(zhi)(zhi)光(guang)電器件無(wu)法(fa)正(zheng)常(chang)(chang)工(gong)作或(huo)(huo)者精度下降。在使用二(er)極(ji)(ji)管(guan)進(jin)行信號處理和調制(zhi)(zhi)(zhi)(zhi)時，應注(zhu)意(yi)其(qi)頻率響(xiang)應和失真(zhen)度的(de)(de)限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)，超過限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)會導(dao)致(zhi)(zhi)信號質量下降或(huo)(huo)者無(wu)法(fa)正(zheng)常(chang)(chang)傳輸。在使用二(er)極(ji)(ji)管(guan)進(jin)行測(ce)(ce)量和檢測(ce)(ce)時，應注(zhu)意(yi)其(qi)靈敏(min)度和精度的(de)(de)限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)，超過限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)會導(dao)致(zhi)(zhi)測(ce)(ce)量誤差增大或(huo)(huo)者無(wu)法(fa)正(zheng)常(chang)(chang)測(ce)(ce)量。在使用二(er)極(ji)(ji)管(guan)進(jin)行保護(hu)和限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)時，應注(zhu)意(yi)其(qi)擊穿電壓和擊穿電流的(de)(de)限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)，超過限(xian)(xian)(xian)制(zhi)(zhi)(zhi)(zhi)會導(dao)致(zhi)(zhi)二(er)極(ji)(ji)管(guan)損壞(huai)或(huo)(huo)者電路(lu)無(wu)法(fa)正(zheng)常(chang)(chang)工(gong)作。四川(chuan)半導(dao)體二(er)極(ji)(ji)管(guan)代理廠(chang)家地址成都ESD二(er)極(ji)(ji)管(guan)廠(chang)家就(jiu)找(zhao)成都長九電子科技(ji)有限(xian)(xian)(xian)公司。

分析這(zhe)一電(dian)(dian)路(lu)工作(zuo)原理(li)(li)需要了(le)解下列兩個深層(ceng)次(ci)的(de)電(dian)(dian)路(lu)原理(li)(li)。（1）VT1等(deng)構成(cheng)一種放大(da)(da)器(qi)(qi)電(dian)(dian)路(lu)，對于放大(da)(da)器(qi)(qi)而言要求它的(de)工作(zuo)穩(wen)定(ding)性(xing)(xing)好(hao)(hao)，其中有一條就(jiu)是(shi)(shi)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)高(gao)低變(bian)(bian)化時三(san)極(ji)管(guan)的(de)靜態電(dian)(dian)流不(bu)能(neng)改變(bian)(bian)，即VT1基極(ji)電(dian)(dian)流不(bu)能(neng)隨溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)變(bian)(bian)化而改變(bian)(bian)，否(fou)則就(jiu)是(shi)(shi)工作(zuo)穩(wen)定(ding)性(xing)(xing)不(bu)好(hao)(hao)。了(le)解放大(da)(da)器(qi)(qi)的(de)這(zhe)一溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)特(te)(te)性(xing)(xing)，對理(li)(li)解VD1構成(cheng)的(de)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)補償(chang)電(dian)(dian)路(lu)工作(zuo)原理(li)(li)非常重要。（2）三(san)極(ji)管(guan)VT1有一個與溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)相(xiang)關的(de)不(bu)良特(te)(te)性(xing)(xing)，即溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)升(sheng)高(gao)時，三(san)極(ji)管(guan)VT1基極(ji)電(dian)(dian)流會增大(da)(da)，溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)愈(yu)高(gao)基極(ji)電(dian)(dian)流愈(yu)大(da)(da)，反之則小，顯(xian)然三(san)極(ji)管(guan)VT1的(de)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)穩(wen)定(ding)性(xing)(xing)能(neng)不(bu)好(hao)(hao)。由此可知，放大(da)(da)器(qi)(qi)的(de)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)穩(wen)定(ding)性(xing)(xing)能(neng)不(bu)良是(shi)(shi)由于三(san)極(ji)管(guan)溫(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)特(te)(te)性(xing)(xing)造(zao)成(cheng)的(de)。

從分(fen)(fen)流(liu)支路(lu)(lu)電(dian)(dian)(dian)路(lu)(lu)分(fen)(fen)析中要明白一(yi)點：從級錄(lu)音放大器(qi)輸出的(de)(de)(de)信(xin)(xin)號(hao)，如(ru)果從VD1支路(lu)(lu)分(fen)(fen)流(liu)得多，那么流(liu)入(ru)第二級錄(lu)音放大器(qi)的(de)(de)(de)錄(lu)音信(xin)(xin)號(hao)就小，反(fan)(fan)之則大。VD1存在導(dao)通與(yu)截(jie)(jie)止(zhi)(zhi)兩(liang)種情況，在VD1截(jie)(jie)止(zhi)(zhi)時對(dui)錄(lu)音信(xin)(xin)號(hao)無分(fen)(fen)流(liu)作用(yong)，在導(dao)通時則對(dui)錄(lu)音信(xin)(xin)號(hao)進行分(fen)(fen)流(liu)。在VD1正(zheng)極(ji)上(shang)接有電(dian)(dian)(dian)阻R1，它給VD1一(yi)個(ge)控(kong)制(zhi)電(dian)(dian)(dian)壓，顯然這個(ge)電(dian)(dian)(dian)壓控(kong)制(zhi)著VD1導(dao)通或(huo)截(jie)(jie)止(zhi)(zhi)。所(suo)以，R1送來的(de)(de)(de)電(dian)(dian)(dian)壓是分(fen)(fen)析VD1導(dao)通、截(jie)(jie)止(zhi)(zhi)的(de)(de)(de)關鍵所(suo)在。分(fen)(fen)析這個(ge)電(dian)(dian)(dian)路(lu)(lu)比(bi)較大的(de)(de)(de)困難是在VD1導(dao)通后，利用(yong)了二極(ji)管導(dao)通后其正(zheng)向(xiang)(xiang)電(dian)(dian)(dian)阻與(yu)導(dao)通電(dian)(dian)(dian)流(liu)之間的(de)(de)(de)關系特性進行電(dian)(dian)(dian)路(lu)(lu)分(fen)(fen)析，即二極(ji)管的(de)(de)(de)正(zheng)向(xiang)(xiang)電(dian)(dian)(dian)流(liu)愈(yu)大，其正(zheng)向(xiang)(xiang)電(dian)(dian)(dian)阻愈(yu)小，流(liu)過VD1的(de)(de)(de)電(dian)(dian)(dian)流(liu)愈(yu)大，其正(zheng)極(ji)與(yu)負極(ji)之間的(de)(de)(de)電(dian)(dian)(dian)阻愈(yu)小，反(fan)(fan)之則大。四(si)川TVS二極(ji)管廠家就找(zhao)成都長九電(dian)(dian)(dian)子科技有限公司。

二極(ji)(ji)管(guan)(guan)適(shi)(shi)(shi)用(yong)于(yu)(yu)各(ge)種(zhong)(zhong)光電(dian)(dian)(dian)器(qi)(qi)件中的(de)(de)(de)(de)檢測和(he)(he)轉換功能。它(ta)(ta)可(ke)以將光信號(hao)轉換為電(dian)(dian)(dian)信號(hao)，并通(tong)(tong)(tong)(tong)(tong)過(guo)(guo)電(dian)(dian)(dian)路(lu)進行(xing)檢測和(he)(he)處理，為光電(dian)(dian)(dian)器(qi)(qi)件的(de)(de)(de)(de)應(ying)用(yong)提供(gong)重要的(de)(de)(de)(de)支持和(he)(he)保(bao)障。二極(ji)(ji)管(guan)(guan)適(shi)(shi)(shi)用(yong)于(yu)(yu)各(ge)種(zhong)(zhong)通(tong)(tong)(tong)(tong)(tong)信設備中的(de)(de)(de)(de)信號(hao)處理和(he)(he)調(diao)制(zhi)功能。它(ta)(ta)可(ke)以通(tong)(tong)(tong)(tong)(tong)過(guo)(guo)正(zheng)向(xiang)(xiang)導(dao)(dao)(dao)通(tong)(tong)(tong)(tong)(tong)和(he)(he)反向(xiang)(xiang)截止的(de)(de)(de)(de)方(fang)式(shi)，實現信號(hao)的(de)(de)(de)(de)調(diao)制(zhi)和(he)(he)解調(diao)，為通(tong)(tong)(tong)(tong)(tong)信設備的(de)(de)(de)(de)應(ying)用(yong)提供(gong)重要的(de)(de)(de)(de)支持和(he)(he)保(bao)障。二極(ji)(ji)管(guan)(guan)適(shi)(shi)(shi)用(yong)于(yu)(yu)各(ge)種(zhong)(zhong)電(dian)(dian)(dian)子(zi)(zi)儀器(qi)(qi)中的(de)(de)(de)(de)測量和(he)(he)檢測功能。它(ta)(ta)可(ke)以通(tong)(tong)(tong)(tong)(tong)過(guo)(guo)正(zheng)向(xiang)(xiang)導(dao)(dao)(dao)通(tong)(tong)(tong)(tong)(tong)和(he)(he)反向(xiang)(xiang)截止的(de)(de)(de)(de)方(fang)式(shi)，實現電(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)測量和(he)(he)檢測，為電(dian)(dian)(dian)子(zi)(zi)儀器(qi)(qi)的(de)(de)(de)(de)應(ying)用(yong)提供(gong)重要的(de)(de)(de)(de)支持和(he)(he)保(bao)障。二極(ji)(ji)管(guan)(guan)適(shi)(shi)(shi)用(yong)于(yu)(yu)各(ge)種(zhong)(zhong)電(dian)(dian)(dian)子(zi)(zi)設備中的(de)(de)(de)(de)保(bao)護和(he)(he)限制(zhi)功能。它(ta)(ta)可(ke)以通(tong)(tong)(tong)(tong)(tong)過(guo)(guo)反向(xiang)(xiang)擊穿的(de)(de)(de)(de)方(fang)式(shi)，將電(dian)(dian)(dian)路(lu)中的(de)(de)(de)(de)過(guo)(guo)電(dian)(dian)(dian)壓(ya)和(he)(he)過(guo)(guo)電(dian)(dian)(dian)流(liu)限制(zhi)在一定范圍內，保(bao)護電(dian)(dian)(dian)子(zi)(zi)設備的(de)(de)(de)(de)安(an)全和(he)(he)穩定性。西藏防雷二極(ji)(ji)管(guan)(guan)廠家(jia)就找成都長九(jiu)電(dian)(dian)(dian)子(zi)(zi)科(ke)技(ji)有限公司。重慶半導(dao)(dao)(dao)體二極(ji)(ji)管(guan)(guan)現貨

成都保護二極管(guan)廠家就找(zhao)成都長九電(dian)子科技有限公(gong)司。西藏ESD二極管(guan)廠價

晶體二極管(guan)為(wei)一(yi)個由(you)p型(xing)半導(dao)體和n型(xing)半導(dao)體形成的(de)p-n結(jie)(jie)，在(zai)(zai)(zai)其界(jie)(jie)面處兩(liang)側(ce)形成空間電(dian)(dian)(dian)(dian)(dian)荷(he)層，并建(jian)(jian)有自(zi)建(jian)(jian)電(dian)(dian)(dian)(dian)(dian)場(chang)。當不存在(zai)(zai)(zai)外加(jia)(jia)電(dian)(dian)(dian)(dian)(dian)壓時(shi)，由(you)于p-n結(jie)(jie)兩(liang)邊載流(liu)(liu)(liu)子(zi)濃度差引起(qi)的(de)擴(kuo)散電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)和自(zi)建(jian)(jian)電(dian)(dian)(dian)(dian)(dian)場(chang)引起(qi)的(de)漂移(yi)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)相(xiang)等而(er)處于電(dian)(dian)(dian)(dian)(dian)平衡狀(zhuang)態。當外界(jie)(jie)有正向(xiang)電(dian)(dian)(dian)(dian)(dian)壓偏置時(shi)，外界(jie)(jie)電(dian)(dian)(dian)(dian)(dian)場(chang)和自(zi)建(jian)(jian)電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)互相(xiang)抑消作用使載流(liu)(liu)(liu)子(zi)的(de)擴(kuo)散電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)增加(jia)(jia)引起(qi)了(le)正向(xiang)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。當外界(jie)(jie)有反(fan)(fan)向(xiang)電(dian)(dian)(dian)(dian)(dian)壓偏置時(shi)，外界(jie)(jie)電(dian)(dian)(dian)(dian)(dian)場(chang)和自(zi)建(jian)(jian)電(dian)(dian)(dian)(dian)(dian)場(chang)進一(yi)步加(jia)(jia)強，形成在(zai)(zai)(zai)一(yi)定反(fan)(fan)向(xiang)電(dian)(dian)(dian)(dian)(dian)壓范圍內(nei)與反(fan)(fan)向(xiang)偏置電(dian)(dian)(dian)(dian)(dian)壓值無關的(de)反(fan)(fan)向(xiang)飽和電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)I0。西(xi)藏(zang)ESD二極管(guan)廠價

成(cheng)都(dou)(dou)長(chang)九(jiu)電子(zi)科技(ji)(ji)有限公(gong)司(si)(si)位于成(cheng)都(dou)(dou)市郫都(dou)(dou)區犀(xi)浦鎮國寧西路88號(hao)港湘商(shang)城.萬樹森林1棟7層(ceng)702號(hao)，是一家專(zhuan)(zhuan)業(ye)(ye)的(de)(de)成(cheng)都(dou)(dou)長(chang)九(jiu)電子(zi)科技(ji)(ji)有限公(gong)司(si)(si)為(wei)(wei)伯恩(en)半(ban)導(dao)體(ti)(ti)（BORN）西南分公(gong)司(si)(si)，從(cong)事保(bao)(bao)護(hu)(hu)器(qi)(qi)件(jian)和(he)功(gong)率(lv)器(qi)(qi)件(jian)芯片(pian)(pian)設計研(yan)(yan)發(fa)與生產(chan)(chan)銷(xiao)售(shou)，公(gong)司(si)(si)產(chan)(chan)品(pin)主要包括：保(bao)(bao)護(hu)(hu)器(qi)(qi)件(jian)、（TVS、ESD、TSS）功(gong)率(lv)器(qi)(qi)件(jian)（IGBT、SIC(MOS、Schottky )）驅動IC和(he)接口芯片(pian)(pian)等，產(chan)(chan)品(pin)性能良(liang)(liang)好。通過多(duo)年的(de)(de)不懈努力(li)，BORN的(de)(de)產(chan)(chan)品(pin)在行(xing)業(ye)(ye)內(nei)過硬的(de)(de)質量、優(you)良(liang)(liang)的(de)(de)技(ji)(ji)術支(zhi)持(chi)和(he)后勤服(fu)務(wu)(wu)隊伍(wu)已(yi)(yi)經(jing)得(de)到行(xing)業(ye)(ye)的(de)(de)極(ji)高(gao)認可(ke)(ke)，高(gao)性價比的(de)(de)產(chan)(chan)品(pin)已(yi)(yi)經(jing)成(cheng)為(wei)(wei)華(hua)為(wei)(wei)、中興(xing)(xing)、大(da)疆(jiang)(jiang)，烽(feng)火、聯想(xiang)(xiang)、廣(guang)汽、欣旺達、比亞(ya)迪(di)、創維等名企下(xia)游(you)代工廠的(de)(de)重要供(gong)(gong)應(ying)商(shang)。公(gong)司(si)(si)。專(zhuan)(zhuan)業(ye)(ye)的(de)(de)團隊大(da)多(duo)數(shu)員工都(dou)(dou)有多(duo)年工作經(jing)驗，熟悉行(xing)業(ye)(ye)專(zhuan)(zhuan)業(ye)(ye)知識技(ji)(ji)能，致(zhi)力(li)于發(fa)展伯恩(en)半(ban)導(dao)體(ti)(ti),BORNSEMI的(de)(de)品(pin)牌。公(gong)司(si)(si)不僅(jin)*提供(gong)(gong)專(zhuan)(zhuan)業(ye)(ye)的(de)(de)成(cheng)都(dou)(dou)長(chang)九(jiu)電子(zi)科技(ji)(ji)有限公(gong)司(si)(si)為(wei)(wei)伯恩(en)半(ban)導(dao)體(ti)(ti)（BORN）西南分公(gong)司(si)(si)，從(cong)事保(bao)(bao)護(hu)(hu)器(qi)(qi)件(jian)和(he)功(gong)率(lv)器(qi)(qi)件(jian)芯片(pian)(pian)設計研(yan)(yan)發(fa)與生產(chan)(chan)銷(xiao)售(shou)，公(gong)司(si)(si)產(chan)(chan)品(pin)主要包括：保(bao)(bao)護(hu)(hu)器(qi)(qi)件(jian)、（TVS、ESD、TSS）功(gong)率(lv)器(qi)(qi)件(jian)（IGBT、SIC(MOS、Schottky )）驅動IC和(he)接口芯片(pian)(pian)等，產(chan)(chan)品(pin)性能良(liang)(liang)好。通過多(duo)年的(de)(de)不懈努力(li)，BORN的(de)(de)產(chan)(chan)品(pin)在行(xing)業(ye)(ye)內(nei)過硬的(de)(de)質量、優(you)良(liang)(liang)的(de)(de)技(ji)(ji)術支(zhi)持(chi)和(he)后勤服(fu)務(wu)(wu)隊伍(wu)已(yi)(yi)經(jing)得(de)到行(xing)業(ye)(ye)的(de)(de)極(ji)高(gao)認可(ke)(ke)，高(gao)性價比的(de)(de)產(chan)(chan)品(pin)已(yi)(yi)經(jing)成(cheng)為(wei)(wei)華(hua)為(wei)(wei)、中興(xing)(xing)、大(da)疆(jiang)(jiang)，烽(feng)火、聯想(xiang)(xiang)、廣(guang)汽、欣旺達、比亞(ya)迪(di)、創維等名企下(xia)游(you)代工廠的(de)(de)重要供(gong)(gong)應(ying)商(shang)。，同時還建立了完善的(de)(de)售(shou)后服(fu)務(wu)(wu)體(ti)(ti)系(xi)，為(wei)(wei)客戶提供(gong)(gong)良(liang)(liang)好的(de)(de)產(chan)(chan)品(pin)和(he)服(fu)務(wu)(wu)。誠實、守信是對企業(ye)(ye)的(de)(de)經(jing)營(ying)要求(qiu)，也(ye)是我們做人的(de)(de)基(ji)本準則。公(gong)司(si)(si)致(zhi)力(li)于打造的(de)(de)保(bao)(bao)護(hu)(hu)器(qi)(qi)件(jian)，功(gong)率(lv)器(qi)(qi)件(jian)，驅動IC，接口芯片(pian)(pian)。

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