8/18/2019 ADC paper

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SURYA SCHOOL OF ENGINEERING & TECHNOLOGY

RAJPURA

  Sessional Test II

Semester /Branch: 3rd

 ECE A/B Session: July 2012-Nov 2012Su!ect: A"C #ime Allo$ed :1 % hrs

Code: B#EC-301 &a' &ar(s : 2)

Note: 1. Section A Contains S!o"t ans#e" t$%e 'estions o( ) *a"+s eac! an, is

co*%'lso"$

). Section - contains /'estions o( *a"+s eac!. Atte*%t an$ ).

. Section C contains ) 'estions o( 0 *a"+s eac!. Atte*%t an$ 1.

  Section A 2 ) 3 04

1 State the main di**erence et$een J+E# and &,S+E#

2 "ra$ and state the di**erence et$een AC and "C .oad line3 Comare BJ# and +E# E'lain n-channel and -channel +E#

) "e*ine oeratin oint and $hat are the *actors a**ectin the staility o* -oint

 

Section - ) 2 3 04

1 +ind the value o* the staility *actor S o* the collector to ase ias circuit havin the*ollo$in comonent values CC 4 105 6 C 4 1(75 6 B 4 100 (75 CE 4 8 9rove that

this circuit has a etter staility than *i'ed ias circuit

2 "ra$ a sel*-ias circuit and derive the e'ression *or staility *actor3 ith the hel o* necessary diarams5 e'lain the oeration o* an n-channel J+E#

 

Section C 1 2 0 3 04

1 "ra$ diaram sho$in constructional details o* n-channel &,S+E# E'lain the

oeration o* n-channel &,S+E# in deletion mode "erive the drain current e'ression*or three reions o* oeration

2 hy there is need *or ias staili;ation E'lain ho$ staili;ation o* oeratin oint isachieved usin otential divider iasin circuit