利盈娱乐(中国)创新平台有限公司

mos管是金属(metal)—氧化物(oxid)—半导体(semiconductor)场效应晶体管，或者称是金属—绝缘体(insulator)—半导体。MOS管的source和drain是能够对调的，他们都是在P型backgate中构成的N型区。在多数状况下，这个两个区是一样的，即便两端对调也不会影响器件的性能。这样的器件被以为是对称的。三极管，是一种电流控制电流的半导体器件-其作用是把微小信号放大成幅度值较大的电信号，也用作无触点开关。晶体三极管，是半导体根本元(yuan)器件之一，具有电放逐大(da)作用，是电子电路(lu)的中心元(yuan)件。三极管是在一块(kuai)半导体基片上制造两个(ge)相(xiang)距(ju)很(hen)近的PN结，两个(ge)PN结把整块(kuai)半导体分红三局部(bu)，中间局部(bu)是基区，两侧局部(bu)是发射区和集(ji)电区，排列方式有PNP和NPN两种。

工作性质：三极管用(yong)电(dian)流控制，MOS管属于电(dian)压控制.

功(gong)耗问题(ti)：三极管损耗大。

驱动才能：mos管常用来电源开关，以及大电流中(zhong)央(yang)开(kai)关电路。

MOS管用(yong)于(yu)高(gao)(gao)频高(gao)(gao)速(su)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，大电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)场所，以(yi)及对(dui)基(ji)(ji)极(ji)(ji)(ji)(ji)或漏极(ji)(ji)(ji)(ji)控(kong)制电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)比(bi)拟敏感(gan)的(de)(de)(de)中央。普(pu)通(tong)(tong)来说低本钱(qian)场所，普(pu)通(tong)(tong)应用(yong)的(de)(de)(de)先思索(suo)(suo)用(yong)三(san)极(ji)(ji)(ji)(ji)管(guan)(guan)(guan)(guan)，不(bu)行的(de)(de)(de)话思索(suo)(suo)MOS管(guan)(guan)(guan)(guan)实践上说电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)控(kong)制慢，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)控(kong)制快这(zhei)种了解(jie)是(shi)不(bu)对(dui)的(de)(de)(de)。要真正(zheng)了解(jie)得理(li)解(jie)双极(ji)(ji)(ji)(ji)晶体(ti)管(guan)(guan)(guan)(guan)和(he)(he)mos晶体(ti)管(guan)(guan)(guan)(guan)的(de)(de)(de)工(gong)作(zuo)方(fang)式才干明白(bai)。三(san)极(ji)(ji)(ji)(ji)管(guan)(guan)(guan)(guan)是(shi)靠载流(liu)(liu)子(zi)(zi)(zi)(zi)(zi)的(de)(de)(de)运(yun)动(dong)来工(gong)作(zuo)的(de)(de)(de)，以(yi)npn管(guan)(guan)(guan)(guan)射极(ji)(ji)(ji)(ji)跟随器为(wei)(wei)(wei)例，当(dang)基(ji)(ji)极(ji)(ji)(ji)(ji)加(jia)不(bu)加(jia)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)时，基(ji)(ji)区(qu)(qu)和(he)(he)发(fa)射区(qu)(qu)组成的(de)(de)(de)pn结(jie)(jie)为(wei)(wei)(wei)阻止多子(zi)(zi)(zi)(zi)(zi)（基(ji)(ji)区(qu)(qu)为(wei)(wei)(wei)空穴，发(fa)射区(qu)(qu)为(wei)(wei)(wei)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)(zi)）的(de)(de)(de)扩散运(yun)动(dong)，在(zai)此pn结(jie)(jie)处(chu)会(hui)(hui)感(gan)应出由发(fa)射区(qu)(qu)指向(xiang)基(ji)(ji)区(qu)(qu)的(de)(de)(de)静电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)场（即(ji)(ji)内建电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)场），当(dang)基(ji)(ji)极(ji)(ji)(ji)(ji)外加(jia)正(zheng)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)的(de)(de)(de)指向(xiang)为(wei)(wei)(wei)基(ji)(ji)区(qu)(qu)指向(xiang)发(fa)射区(qu)(qu)，当(dang)基(ji)(ji)极(ji)(ji)(ji)(ji)外加(jia)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)产生的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)场大于(yu)内建电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)场时，基(ji)(ji)区(qu)(qu)的(de)(de)(de)载流(liu)(liu)子(zi)(zi)(zi)(zi)(zi)（电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)(zi)）才有可能从基(ji)(ji)区(qu)(qu)流(liu)(liu)向(xiang)发(fa)射区(qu)(qu)，此电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)的(de)(de)(de)最小(xiao)值即(ji)(ji)pn结(jie)(jie)的(de)(de)(de)正(zheng)导(dao)游通(tong)(tong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)（工(gong)程(cheng)上普(pu)通(tong)(tong)以(yi)为(wei)(wei)(wei)0.7v）。但此时每个(ge)(ge)pn结(jie)(jie)的(de)(de)(de)两(liang)侧都(dou)会(hui)(hui)有电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)存在(zai)，此时假如(ru)集(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)极(ji)(ji)(ji)(ji)-发(fa)射极(ji)(ji)(ji)(ji)加(jia)正(zheng)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)，在(zai)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)场作(zuo)用(yong)下，发(fa)射区(qu)(qu)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)(zi)往基(ji)(ji)区(qu)(qu)运(yun)动(dong)（实践上都(dou)是(shi)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)(zi)的(de)(de)(de)反方(fang)向(xiang)运(yun)动(dong)），由于(yu)基(ji)(ji)区(qu)(qu)宽度很(hen)小(xiao)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)(zi)很(hen)容易越过(guo)基(ji)(ji)区(qu)(qu)抵达集(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)区(qu)(qu)，并与此处(chu)的(de)(de)(de)PN的(de)(de)(de)空穴复(fu)合（靠近集(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)极(ji)(ji)(ji)(ji)），为(wei)(wei)(wei)维持均(jun)衡，在(zai)正(zheng)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)场的(de)(de)(de)作(zuo)用(yong)下集(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)区(qu)(qu)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)(zi)加(jia)速(su)外集(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)极(ji)(ji)(ji)(ji)运(yun)动(dong)，而(er)空穴则为(wei)(wei)(wei)pn结(jie)(jie)处(chu)运(yun)动(dong)，此过(guo)程(cheng)相似(si)一(yi)个(ge)(ge)雪(xue)崩过(guo)程(cheng)。集(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)极(ji)(ji)(ji)(ji)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)(zi)经(jing)过(guo)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)回到发(fa)射极(ji)(ji)(ji)(ji)，这(zhei)就是(shi)晶体(ti)管(guan)(guan)(guan)(guan)的(de)(de)(de)工(gong)作(zuo)原理(li)。三(san)极(ji)(ji)(ji)(ji)管(guan)(guan)(guan)(guan)工(gong)作(zuo)时，两(liang)个(ge)(ge)pn结(jie)(jie)都(dou)会(hui)(hui)感(gan)应出电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)，当(dang)做开关(guan)管(guan)(guan)(guan)(guan)处(chu)于(yu)导(dao)通(tong)(tong)状态时，三(san)极(ji)(ji)(ji)(ji)管(guan)(guan)(guan)(guan)处(chu)于(yu)饱和(he)(he)状态，假如(ru)这(zhei)时三(san)极(ji)(ji)(ji)(ji)管(guan)(guan)(guan)(guan)截至，pn结(jie)(jie)感(gan)应的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)要恢复(fu)到均(jun)衡状态，这(zhei)个(ge)(ge)过(guo)程(cheng)需求时间(jian)。而(er)mos三(san)极(ji)(ji)(ji)(ji)管(guan)(guan)(guan)(guan)工(gong)作(zuo)方(fang)式不(bu)同，没有这(zhei)个(ge)(ge)恢复(fu)时间(jian)，因而(er)能够用(yong)作(zuo)高(gao)(gao)速(su)开关(guan)管(guan)(guan)(guan)(guan)。

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