S pecial iza tion : VLSI and Em beddedSystem MECVE 201- ANALYSIS AND D ESI GN OF A NALOG IN TEGRATED CIRCUIT (Reg ula r) Answerallquestions. 1. (a) What ismeant byBod y effect? What isits effect onthe tran sistor paramete r? (5 ma rks) ( b) Dis cu ss ab o ut MOS mo dellin g in lin earsat urati on an d cut -offre gio n. (1 0mark s) (c) Fora sourc e fo llower stage with acu rrent mirr orto pr ovi de bia s cu rrent o b tain th e expression • fo rAV. Or2. (a) Draw the circu it ofFolded-Cascode ampl ifier. Derive the ex pr ess ion fo rAV . (15 marks) ( b) Deriv e anex pression forou tp ut res istance ofC S stage. (1 0ma rks) 3. (a) Wit h the hel p of circuit , exp lain the operatio n ofthe Cascode current mir ro rand deri ve th e expr essi on fo r i ts ou tp ut im pe da nce . (15 mar ks) ( b) Dra w th e Sch em at ic of ba si c differentia l am plif ieran dexplain its common mode resp onse . (10ma rks) 4. (a) Com pa re basic curre nt mirr ors with Cascode current mirrors. Why it is ne ces sar y to use cur rent mirrors as load in different ial am pl ifi er? (8marks) (b ) For a differential am pl ifier with curren t mir ro r load ob ta in th e ex p ression fo rCMRR usin g th e small sign al model. (17ma rk s) 5. (a) Dr aw the CM OS real iza tio n of tw o sta ge Op- Amp an d ob ta in the ex p ression f orits ga in . (17marks) ( b) Ex pl ain th e ne ed fo r co m pen sation. (8 mar ks) Or6. (a) W ith the help of di ag ram ex pl ain t he fun ction o f cu rrent mirro r Op- A mp w ith wide s w ing Cas cod e curren t m irrors. (b) D iscuss abo ut Do min ant pole com pen sation . 7. (a) L ist an d ex pl ain a bo ut va rio us n ois e m od els fo r cir cu it ele m en ts. (b) A naly se the O p-A m plowpass filter fromno ise pe rspe ctiv e. Or(15 m ark s) (10 m arks) (15 m ark s) (10 m arks) 8. (a ) W ri te n o te s o n : (i) Fl ic k er no is e. (ii) T he rm al noi se. (b ) D er iv e th e ex pr es si on fo r no is e b an dw id th fo r a fir st ad d er lo wpa ss filt er . (14 m ark s) (11 mark s
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Second Semester M.tech Degree Examination, November 2012
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8/13/2019 Second Semester M.tech Degree Examination, November 2012