Question

Please answer the following question, please box your answer & write clearly!!

8. Analyze the following MOSFET circuit for de bias. Solve for ID, VGs and VDs. Use Rp=5 kQ, Rs=5 k1, RG1 =1 MQ and Rg2=1 MO. Use a power supply with VpD= 12 V and Ky=1 mA/V- and V tn=1 V for the NMOS.

Answer 1

Q8/ Ani A MøŞFET (le Enfant cment type Mos Fert) is ginen as TV0o = +12v Kn=1 MAINZ Ven= 1V N-channel Enhancement type Auch MOSFECT - IN 15K3ks 8: Vu= VODNIM ? = VDD = 12 20 = 6 * by applying the nine equivalent at gate - texminal of the N-channel Enhancment type Mester 10.2+ime = value = 12v=6V 1Mr time Vy= 6v Ry= RyillRy9P 1 Mellime =0.sme [Rg=500k?" T+12V * By makeing assumption SKARO that MOSFET is working m Saturation region. In Saturation regions Dalbvs conditions for Vos is: GV SKR Vosa Vgs - Vp) Saturation I .. Dram current ID for Feven im Baderation vifion is given as: ID = 1/2 Mn Cr WILLVys-V)² In 500kr 왤 케 TGV 18 CamScanner -

* Ij = Band (Nys- Vend? kn = 1 mAll conduction o process parameter ID= IMA ( Van V8--V)= 416-516-1)? Ij = (5-519)? 1825 (1-1)2 S ID is m ma 2 Ip = 25(1-10) 219= 25(1–2 19 + 109 210 = 25-50Ip +2510? 3 25.737-5219+2550 ID=52 1 5o2.com Id=527 d 270 - 50 S2 Id2704-2500 =521N 204 mA Tot ID = 52+14.2828 OMA 50 ID=1.325 mA, 0.7543MA * To check weather our assumption is correct or not Vo = Vog-ID RO] O ID = 1.325 MA Vyt VD=L12-1325x5) v =5.375V Nos Vy-v- 75.375716-1). (5.37535 v D ID= 0.7543 MA 3 NO=(12-0.7543x5)=8.228 V Vo = 3.2281) Vo Vy-Vip => 8.22836-1) V cs scalone with 8.228>51 CamScanner

7 Assumption for region of operation that is taken by us is correct so Now we can say that given MOSFET is operated his Satur --ation session, - * drain Current that we have choosen BID = 0.7543 MA 1 for this value of during Cerprento Mosfere will operated, easely Im Sebepasion region. 's draina Cupperto for given MosFETT 92 91=0-7542MA7 * Source Voltage: CV$):- 1 * Actual reason for choosing drains I Current ID=07SUMA Instead of ID = 1:325 mA) is that Vgs =Vg-vs Vg – Vs = 6- Io R$ = 16–1325x5) v Nys=16-61625) V=-0.625 V V4$=6.625V Vi= 1 V sa Vgs < Vt MOSFET operated in e cusoff region LICS CamScanner CS Scanned with

- * for drain current ID=07548 MA Vys= Vy Vs = 6-0.7543X5) V=16-37715) 195= 2:228V) Vt = 1V Vas > V MOSFEIT IS turn on s rosa Vela VT = MosFetis is ID=0.7542 mm $ Suduration regimi * Vys= Vejs = Vy-VŞ= 6- Io Re Výs=16-0.754385) V=2.228V Vys=2228V * VD = Vo–Vş =( VOD - IDRO) – (IDR) Vos = Vos - (Ro+R$) ID = 12–(5+5)*7543 Vos = 112-10X0.7543)V= 12–7.543) v cs Vos=4.457V)* CamScanner .