7/26/2019 DE_02 (Journal+Q&A)

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Subject: TRONLA 2 Name: RABAYA, Janray S. Section: ECE-A n: 2!

"e#i$n E%erci#e &2

'ET Bia#in$

Journa(:

)n t*i# (aboratory acti+ity, e erorme/ on *o to con#truct a Se(-bia# coni$uration o 'ie(/

Eect Tran#i#tor 0'ET1 con#i#tin$ an n-c*anne( Junction 'ie(/ Eect Tran#i#tor 0J'ET1 2N!!3. T*e

circuit i# (i4e an Emitter Bia# but at t*i# time t*e termina(# are name(y t*e $ate, /rain, an/ #ource. )n

J'ET, t*e contro((e/ current a##e# rom #ource to /rain *i(e t*e contro((in$ +o(ta$e i# a(ie/ beteen

t*e $ate an/ #ource. 5it* t*e re+er#e bia#e/ inut junction, it *a# a +ery *i$* inut ime/ance t*u#

minimi6e# t*e intererence it* or (oa/in$ o t*e #i$na( #ource *en con/uctin$ a mea#urement. 'ET7#

are a(#o common(y u#e/ or (o #i$na( am(iication# or e%am(e, am(iyin$ ire(e## #i$na(#.

T*i# i# a 8c*an$e i# comin$9 erormance or me. y 8n9 i# not a cur#e but t*i# time, it7# a

comebac4. ) may #ay t*at t*i# e%eriment i# muc* better t*an t*e re+iou# one becau#e 'ET i# not t*at

/een/ent on it# tran#con/uctance or t*e counterart o Beta in a BJT. eanin$, mea#urement# ere

ea#ier to /o #ince it7# not aecte/ by temerature. Sti((, ma/e a (ot o tria(-an/-error# ju#t to $et a (o

ercenta$e error an/ con#u(te/ rom t*o#e *o $ot t*eir or4 c*ec4e/. ) $ue## it i# a matter o (uc4 a$ain

but ) may recommen/ to rea((y con#u(t rom t*e roe##or becau#e in e+ery +a(ue# o 8n9 an/ J'ET7#

)"##, t*ere i# a corre#on/in$ con/ition# an/ #et o ormu(a. Ju#t $i+e a #*ot e+ery tria( an/ /on7t (o#e

atience.

)n conc(u#ion, t*i# acti+ity *e(e/ me to better un/er#tan/ t*e be*a+ior o 'ET, an/ in articu(ar

an n-c*anne( J'ET. 'or urt*er e%eriment# ) recommen/ a(#o to con#truct t*e /ierent coni$uration, #o

t*at e can ro+e a(( t*e t*in$# e *a+e (earne/ in our (ecture an/ i(( *e( u# to areciate t*e #ubjectmore.

7/26/2019 DE_02 (Journal+Q&A)

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Subject: TRONLA 2 Name: RABAYA, Janray S. Section: ECE-A n: 2!

"e#i$n E%erci#e &2

'ET Bia#in$

;ue#tion an/ An#er:

At cuto, t*e J'ET c*anne( i#,

A. At it# i/e#t oint

B. Com(ete(y c(o#e/ by t*e /e(etion re$ion.

C. E%treme(y narro.

". Re+er#e-bia#e/.

Bac4$roun/:

T*e cuto re$ion o a J'ET tran#i#tor i# t*e re$ion *ere t*e /rain-#ource c*anne( re#i#tance i# at

it# ma%imum an/ t*ere i# no /rain current, )", (oin$ rom t*e /rain to t*e #ource o t*e 'ET tran#i#tor.

)n t*i# re$ion, t*e tran#i#tor i# o. T*e cuto +o(ta$e 0. *tt:??.a((aboutcircuit#.com?te%tboo4?#emicon/uctor#?c*t-!?junction-ie(/-eect-tran#i#tor#-jet?

2. *tt:??*yer*y#ic#.*y-a#tr.$#u.e/u?*ba#e?e(ectronic?et.*tm(

. E(ectronic "e+ice# an/ Circuit T*eory by Robert L. Boy(e#ta/

An#er: B. Completely closed by the depletion region.

http://www.allaboutcircuits.com/textbook/semiconductors/chpt-5/junction-field-effect-transistors-jfet/http://www.allaboutcircuits.com/textbook/semiconductors/chpt-5/junction-field-effect-transistors-jfet/http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/fet.htmlhttp://hyperphysics.phy-astr.gsu.edu/hbase/electronic/fet.htmlhttp://www.allaboutcircuits.com/textbook/semiconductors/chpt-5/junction-field-effect-transistors-jfet/http://www.allaboutcircuits.com/textbook/semiconductors/chpt-5/junction-field-effect-transistors-jfet/