MOSճ֪R(sh)-10Ԕ(x)DMOSܵĽY(ji)(gu)ԭ
ʲôMOS
MOSǽ (metal) (oxide) 댧(do)w (semiconductor) (chng)Ч(yng)wܣ߷Qǽ ^w (insulator) 댧(do)wMOSܵsourcedrainǿԌ(du){(dio)ģPbackgateγɵNͅ^(q)ڶ(sh)r£@(g)ɂ(g)^(q)һӵʹɶˌ(du){(dio)Ҳ(hu)Ӱ@ӵJ(rn)nj(du)Q
pO;wܰݔС׃Ŵݔݔһ(g)׃pO;wܵͶxݔݔ֮ (beta) һNwܽ(chng)Ч(yng) (FET) ݔ늉׃D(zhun)ݔ׃FETtransconductance xݔ׃ݔ늉׃֮ϳеһNϵPϵPϵҊ(jin)Ğ͉MOSܡ
(chng)Ч(yng)ͨ^(gu)ͶӰһ(g)늈(chng)һ(g)^ρ(li)Ӱ^(gu)wܵ(sh)ϛ](mi)^(gu)@(g)^wFETܵGATEdzСͨFETһӶ(li)GATEOµĽ^w@NwܷQ댧(do)w (MOS) wܣ댧(do)w(chng)Ч(yng) (MOSFET) ?yn)MOSܸСʡ늣ѽ(jng)ںܶ(yng)È(chng)ȡpO;w
MOS܃(yu)(sh)
1ɑ(yng)ڷŴڈ(chng)Ч(yng)ܷŴݔ迹ܸݿ^Сʹ늽
2ܸߵݔ迹dzm迹׃Qڶ༉(j)Ŵݔ뼉(j)迹׃Q
3׃
4ԷԴ
5_P(gun)
6·O(sh)Ӌ(j)ϵ`Դƫؓ(f)Oֻƫ¹ӹֻؓ(f)ƫ¹ݔ迹Ԝpp̖(ho)Դؓ(f)dڸǰ(j)ƥ
MOSܽY(ji)(gu)ԭD
Y(ji)(gu)ͷ̖(ho) (Nϵ(qing)͞) һK^͵PϔU(ku)ɢɂ(g)^ߵNͅ^(q)©OԴO댧(do)w渲w^Ӳһ(g)늘OŘO
MOSܷ̖(ho)
ԭNϵ(qing)͞
VGS=0r(sh)VDSOпһ(g)PNY(ji)ƫԲڌ(do)늜ϵ
VGS=0ID=0
VGS횴0Ӳܹ
VGS0r(sh)Sio2|(zh)Юa(chn)һ(g)ֱڰ댧(do)w늈(chng)ųP^(q)ӿѨ(dng)VGS_(d)һֵr(sh)P^(q)挢γɷ͌Ӱуɂ(c)N^(q)ͨγɌ(do)늜ϵ
VGS0 g ͌ (do)늜ϵ
VGS ͌׃ VDS ID
VGS VTr(sh)VDS^Сr(sh)VDS ID
VT_늉VDS_ʼ(do)늕r(sh)VGSVT = VGS VDS
VGS 0VDSһֵ©OĜϵAγɊA^(q)
VDS ID׃
MOS(g)Oж
mosܵ(g)OքeǣGŘOD©OsԴҪŘOԴ֮g늉ijһضֵ©OԴ܌(do)ͨ
1ДŘOG
MOS(q)(dng)Ҫκͼӏ(qing)(q)(dng)ãMOSܵG̖(ho)βc(din)u(png)ГQAΕ(hu)ɴܓp丱ǽ·D(zhun)QЧʣMOSܰl(f)(yn)ןpMOSGSgһݣG̖(ho)(q)(dng)(yn)Ӱ푲׃ĕr(sh)g
G-SO·xf(wn)ñR1nڱPSOtPDOֵ(yng)ךWʮךWl(f)F(xin)ij_cփ_ʟo(w)ҽQPԞo(w)tC(sh)_GOɂ(g)_ǽ^ġ
2ДԴOS©OD
f(wn)ñ?y)R1knքe(g)_֮g衣ýQPy(c)ɴֵ^ͣһǧWʮǧWһΞ˕r(sh)ڱPSOtPDO?yn)y(c)ԇǰͬy(c)RDSonֵփ(c)нoĵֵҪһЩ
3©-ԴͨB(ti)RDSon
Դ-©֮gһ(g)PNY(ji)˸(j)PNY(ji)ڲR(sh)eSOcDO500f(wn)ñR1n(sh)y(c)һֻIRFPC50VMOSܣRDSon=3.2W0.58Wֵ
4y(c)ԇE
MOSܵęzy(c)ҪДMOS©··Ŵֵ](mi)y(c)MOS©늬F(xin)wE£
B?xn)ŘOԴO_f(wn)ñtڹP׃_˻صo(w)tMOS©׃táȻһ(do)MOSܵĖŘOԴOB(li)̷ָ?z)otMOSѼtPӵMOSԴOSϣڹPӵMOSܵ©Oõıָʾ(yng)ԓǟo(w)
һֻ100K200KBږŘO©OȻѼtPӵMOSԴOSϣڹPӵMOSܵ©O@r(sh)ָʾֵһ0@r(sh)늺ͨ^(gu)@(g)茦(du)MOSܵĖŘOa(chn)ŘO늈(chng)?yn)늈?chng)a(chn)(do)(do)늜ϵʹ©OԴO(do)ͨf(wn)ñָƫD(zhun)ƫD(zhun)ĽǶȴԽá
MOSܵđ(yng)I(lng)
1I(y)I(lng)M(jn)R_(d)(q)(dng)@I(y)_P(gun)Դ
2ԴI(lng)׃늘o(w)˙C(j)
3ͨ\(yn)ݔI(lng)܇d׃܇HID늄(dng)܇
4GɫI(lng)CCFL(ji)ܟLEDԴu(zhn)
MOSܽ·
DQ27NϵMOSU22A1_ݔƽr(sh)Q27(do)ͨVCCDDR(ni)늉õ1.2VHT늣U22A1_ݔƽr(sh)Q27ֹ1.2V_HT늉0V
