mosfet_notes

mosfet_notes - J Field EH‘EH “Wat/15633193 3...

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Unformatted text preview: J Field EH‘EH “Wat/15633193 3 COMprehenswe Revxew ._ Fws+ i’ass (Duolrfqh‘ve Undenfiandtv 0? DQMWe Opercahon ' The basic. ‘Wmos +mrxSISr0r INS ‘lNfimJ‘Qq above .‘The 14+ swarm. and drank Magma—3 are dncifused 0*” ‘mP'Qm’red VITO +h€ ugh-Hy doped Psubs’rr'qlre and OLth owde Sepcrcn-Fes ‘H‘IQ (,Ohdugfiqg gone 15mm +hC Si surface w No LURRENT FLOWS FROM flag“ DRAIN 'TO SOURCE WITHOMT A CONDUCTME N-—QHANNEL BETWEEN THEM‘ CD ' This (on be undevwood by lookmj m- +he band onqgmm o? «the MDS’FET m EQUtlfbvfum along ‘Hne Chcxhnel-- The Farm; levfi‘ #8 FLAT (016,9. 015 8+ b61in m flquthbr‘tum) Tm Condudeon bond y-g (105.? +0 five Farm"; m HE h1- soumg [dram/4 buffi‘i‘ss U036" +O+h€ Veils-nee band in fine ’P“‘+“~1P€Subs+m+e WM! Thus, WE 36.6 Ci 90+Cn1idi barrier For cm €‘flk‘hr0n +0 So‘fit’gy‘v‘ $ource +0 drain \ When 0. Posvhxie v'oi’ruge ‘8 applied) POSITNE. LHARQES MAE jiN FACT/IN EFFECT} DEPOSITS—.13 ON THE URTE METRL. 1n V€SPOHS€ ,-+her€_ W1“ be C3 Fteld OIU’DSS “we 3611i oxadg. Thus -, hegaert Unarg—es are mduued w‘i ‘ l 1Q; "'Hfle, under-'k/{hj‘ Si and {V691 howl—S Or: V6,?QHQC1 I for/Ming Ci d€P\Q'hOh Yegloh .. In New” addition) we Lem exp-Cd 4mg amc‘rvcm LancerfirCL-‘noh 1-0 CHIC: ,-.4_. Recott". v19“): “am, QM) ( KT So) +116 'mduced MISQ’SVQ Charges on “fine, Ski-flute are. dqtm; 3hc.rCOS€ Q‘s well‘ ) Ju3+ h1g3 £—YOW\ ’Pr‘1JUpthI-I CD DQP‘QT‘O“ 0’; “0&5 CW ’H‘e- Surf-“ace \Cflmry I’me negating” Chou-39d - waged OCLQP‘TOYS , NR.“ on of mobxle emdfi’bm . Vie/Mamba“ ’Hmofi' Jqfi' @ RCLMMU\C{+I ; ' . r is .130 0103.3 at + mac/m We. Mbbile 3 because 'WIQ surface P PQC)‘ 1. 7.. i M 7-; n; ‘2 MA .-+an g U. ‘ M, eleccvon Lenten“ ‘0‘ ‘ 0 T m . ! Ema-3 €\-€(,+ron§ are tiedmficfimqflj mdumd m +he. P...“ fl LhczmneJ V390?“ 1 ‘H‘fl maflflfil b-cto‘mfi ‘63 Pmke 03nd rnpoxée 'n -- Noe. vohq-f does ’hm3 *VQV‘t-“OQ‘QI 1’0 a“ 5W” F?! Mun thfir‘gj Band dlqlfifqm r); The Fermt mu“ Hogan +0 fine C8’ or... I We. bonds We‘ve, oloww Sui“ +h011‘ ‘fi'he VB .3 how FUHLher away 9mm fine Fez/Mk \e‘dfii‘ C2] E; ———~____/______A.—————————-". M- ___. rflhb ._. _—~"/ 0000 \\_____ME'- “‘§ _ ‘F_ ’,/’ F\HH__“ OOO( " ECN'hbh‘Lm Undtr O POSH'Wfi 3 q‘rfi bias Tm Ogmwsm REWLES THE P‘OTENTWPTLBRREJEQ‘ Hence ’one mew of 4m MOSSFET I3 +th‘ W \S a 90+-a"<on+rolled Pawn-rial barrier‘ ‘1? +h€1 barrier IS reduced Squoen’r-b by a??\\1mfl 0 331m: \IOH”Qge gvfifififir ‘ann 'Hne Jrhreshoh] u 'VUHQSQ ; fibere ’3 S‘Smflmfi “WVQ’VL‘ “OW "Cmm Source, +0 cumin Rn ori’feonfiwg Uifiw 0+ 01 MOSFET KS “*th Hr is q 8Q+Q_(On+io_ Mad feSvS.‘TO‘-"~ If ‘H‘e (Posthve) ficfie vquSe QXCefid‘s fire .Jrhrfishoid Vol‘irctgfi m an n--—<,h<1hng\ 96+;eledrom are In duced in 4%! ?_+\'Pesubg+m+ed ‘ Slave Jr-lms Channel is CaanU-eq +0 ~Pne_. n+ fabume, and drain ream“) H“? SAFVUCN‘E- ‘ODKS' elfififilffiw on induced Vt “rape. V‘QS \E'Tbr‘ .. move. clad-vow tho-'36.. ls Induced dncxrmel bfifivaS Mere Nae (3.5 +he. 3q+e voHCLge Increases , In 4th (bound and , +here (Pore. , +he (Oncluu-Mj (Uh 7‘ j P L). The drum (,uvvemf+ INBTWLLY INLREMES wwH THE-mam B!QS( lmeqr regime. Ups 4 \qus-fi \h-h) . Bui- 05 more cirth Current g‘ows ,hqrough Ame; ghqhnei +h€re ‘3 W‘IOFQ Ohm.lC..\J'C>H~CL3€ Vor‘fi 4:va {Earn nfiqr +he’ 9mndeq Somme +0 Who +‘Qver‘ “Hie. Ct dram (30+CrH.zq‘ 13 neg,» dr‘hlnend\ -—-~——-————-—-—9‘ 9 44M \ \n. V011“ , T /‘ vs O '3 D) PD\SSQh and \ Com be no charge “We. of" "Th0 5U Hon ned ? Rem“ .H‘Q \' (Alfie/W‘- .1“ a: —— MACON (fl WM 1.; cords) __:, 0 -'\'\«e.Y\ V“ flag": Larméri VQQUA "’rhéw‘ ow +o+ql currenjr Curran 4... Jrofi-cd charge. X “The VOH' 039 CY'IWeJcnce befrween Jrhe. flak—2.. and (home! reduces 59mm \JQ near “Hm: Source (\l U '_ \l D) hear +he dram and“ Once ‘rhe. dm‘m end {5 biomd sum +£qu VO'UD 7‘ UT ) Thresho‘td 18 barrel“; mom+mh€id ngqr 4‘06. dram end! Who”— dOfi-S «Hm mt‘an '9 We“, one uiéw oi? Hr Iis +hat Mae Channfl i8 Pmckfid o¥¥a ‘S +CHS US 4’th Have Charge be Inc He \toH'age I This ‘8 Mote Sowimj +ha’r 'Pne How (an (,QrfC-HJI’ “Wen r «and 0? “We manna 7: O . I \s wwan bqu‘ \JQloc \fj bfl J! 00 \ Physicaug .5! Arm Lens-ham’i‘s (ED Jr'mg meanS SCI-R’ura-hon veiomb f beat“)th )‘Jchen sum rag—fed. Sub—hares ho! 0) O'?€*"8”H0n We can use Cl- ca?au'h\}€. clwxder +0 J?an “PS ‘ Recon Mao” 4“ MOSFET (961*e-txcmc1ed) «s (1150 burr 1 back- +0 bad: modes .. JV} P 'Y] JEFOM our diode \IKE WOW 0‘30 'HOQJV WQ Cdfl "Hfli’fl: OF regtorx +0 be Much grea+~er +hom VeSiHQme. in “HE &QP\€H°h “For ends 04 +he Jung’r‘xcm 2 reason WW3 “a soy I-Wfi kn 'H’l-Q OH “Hat. \IOH‘Qgfi (1(0)? is Hue QCVO€S+he anleflon June-hon M Ih SubJrhr-eshdd ( \JDS ‘8 Vfig S'mcm -’ UT“ 7 was) ’qu fiour'cfi “T1- __t 5, kCS‘stmnCe is urvfir‘fi'POH—h dufiqe IS Shflh’flj bfussed; Orgcr .43th mefi (Joanna V€SKSWNQ \rx ~th C We, Can +hu5 {xpicfr our gun/rem???) be— “ mode. H The drdtn heed NOT +0 be rCV€rStd 3mm! WT has ID. Nae ‘ M: m ma] e‘FWC'CC’fS on (30:13 boxLL +0 our diode \ 990mm . we can 5&3 CW Lurrerfl' is a di—Wusskm Luvrcn+\ (VS 3" _Co¥ a V05 19:”3L9flffi’l (“3 , I CS‘ i‘ COX. I I @YQ'EGC'T'OK— So we Ste '1. Sub'Hfl re sham shape W--—.__\ (90M \I Cox . EKV » m odek -. ED \‘\\¢c our ‘pWWWd/Yeuem‘? buwem‘ mode,‘ 40’ BUT'HS" We, mama dram (Amreffi‘ as “fire. SbUrce \hJCCJHOH we drdm back. lhdfid‘lon‘ thrwt‘» 19 IR '- 1: is \OSIL + .e/XP UT :g T C1 1314; lug, Wu} L ______..__._ K fl‘ la ”__CSI Coxf CS! ZUV IR :- 15 my“ + w “’23 (WED 17: 134e,“) (“HVQ-Umfijgxp :51; .... expr!) ] UT \J'T' ' C53 V613 > U1th / UOS< U033“. / ltfi—QQV Labowe fixreshokfl __-— GL: 2%? [(KWQ“-\HW>)“\J5)1_ (K(U6*’U+hc>flvazj \Jbs > U—i-rmj' U05 2 UDSQT:UDS"UH-co - I : 5:7: ( k. C V 01‘ U‘i'ho " L 4m 11: /IR >7 1 UDSM 3 |<( Uh” \J—tm)"\}s 2.. UO Mum Cox \Jpsir .—_—_..... L- 2.x :1me U ® fTht-l BO ffegf ~Hme, Uip WM) how we, Home +qkeq bulk +0 be grand” in SDI/he Cir'wH‘ (Chg-{gurahmy} +he bqu Fermir‘tq! O? Hue: MOSF'ET is biased oer a UOH'OQC’ Ute—>5 NW: ‘reSPeflrb ‘Jr-he, 50W<e* We. (0le U5: -Hn<-> backga+€ b {as 51 me “HW- louHQ 90+en+1ql oflegjrg Ame deb—rm“ (910(93- in +‘ne. Charmd OWE} CU (13603005 afic‘ U933 ShrH' fine, Qo+cnhq| 0*: ‘HWQ- Sakai-cafe, lower} maeosmj +he__ Po+en+‘q\ drop across +he. dame—Tm“ rfigrons (N016 Mm U813 1? NEGR‘YHJE)‘ UM“ 3 {Mod}! ((139 +UBS) 3 dej) ‘ imp-Ans L Channel (30+‘erH-mi Urm 2 U a? {3 —~-% 2(1)? + Jig—{ma £5) (-‘lCDp-M 435) um: \J'ron + “mMJ-ime—um — 4m) :5 [10‘ N“ /Co>< . o o \ Dth-ccl Circu‘ih Usmj M05 ‘TYQnMS’rO‘rTS LeJr. us COhSlder' Hue Invcfier Uofiqge TmnSPer Char-acrenghclwb / 3H $____ 'T 4. i. Vm We define mpu’r and OUWM‘i‘VOHch-EJ m FOHOWS V1L_ “\IOH'cxge. mpxfl‘ low -—— I'hpui‘ VOH'O.9€ where. Jr'he. S\op~<—: 01E +he VTC. rs ’11 I . 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WOBLEMS Q) I Phfl- JFhe dram (“Wen—1' OS CA 'FLth‘hOH 01C Ugg per- "Hje fongfi. W5<Vgs C O _ whqk happens +0 'flna fihreshoid VDH'OLQQ ’3 Pioi‘ V‘m 7 Q3 {1 ‘rundflo‘n 0F UBS‘ - ‘0’) L871" U88 '2: Q SWQQP Vus‘ Mfieqd ‘- Flo!" In. as Q 'FHHC+\OH OF Vug PDT 0 4 V6.23; 4" S V.. c) From +he' IDWEQ P'OJF N“ PWF‘") Md SYQP‘MW‘B ' +he backgod'e +rcmSLoviduC’f'0HCfl ) Sm‘o‘ . h 1‘ We Lan+hml< as Mae. buns <15 bewfl Qho+her 905m 3mg? "43 S‘th I. z __ 9W2 ‘3V1‘hb 65 ‘9 i an5 9m 610.- 509$ 8) From Pafl’ b) Qnd graphic,qu +he +YCIHSCOYIC£UL+Gth) 3m!- PMOS U8: 0‘ M2 m/L25fl5 }>'-—"“—"Uov\-\' I NMOS- U)/.L,:b/L5 .q) Rind +he value OF UR JFOV wfiygk Currcn+‘ m M2. 18 ZOO/Mp. In Sq'+ur0~fit3f\'- b) What 13 “We VUHCLSB 3min mt +h4s may; C) - (Olculai't VVm such-+qu Dow = .24 Vows“ Under Whigh Yiglme,o€ 0P€r0+10n 15' 6.06% +Yah3|$+f>r QPQVQ‘F‘In‘S 519. L . repeat" Pct/k5 arc,” t’r beHreer or wome?wk3 d) wa annth .100" fine P9403 :3 (flute) and IQ) Draw +h—e $qu Slgnql monA ‘. 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This note was uploaded on 02/06/2008 for the course ECE 3150 taught by Professor Spencer during the Fall '07 term at Cornell.

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mosfet_notes - J Field EH‘EH “Wat/15633193 3...

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