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trb—-him plifier-—
en"
ee eee @
Refinitior’ Ste: ahing of
ignal with out change
i in shape tr * Frequency »
x Seeeee reece
et
output
yt: Fo) Ad chreuik 40 act ax an -Anplifiler, input
‘| funckion most be forward bias, ourpul- emogt
be wevetae biased + ; . :
caren Beas Coutaietin ont ot an Art
ce ES ete Coe Vee — TS forward bias the input junction
C cmittey bese Junctioa]
Nec — Te weverbe bias the ouput Janckon, {i
Ceollectos bate. junction], |
Re — Source Rerigtance . i
Re — load Resigtance .
(Ce, Ce — Blocking capacitance
—> ve
Mout
| A. During
nature ot
Coupling capacttor, which coupling ac, i
| Representation *
—S AS
— > Pl
which’ “bioers |
“Re }
Cot) i
Emitler curicnt
emitter cunment
Emitler cunent CAC t 0C), |
ietic —@®
Mee - teRa —— ©
halt cycle, fomward bias
potitive
vi
Hence, tput
2. During neg ative
emitter
of
ror
nature ot
makes increase
Brerare of Tc
woltage decreaser
Chamctretiy 2
1) Saput, qnd Output
D Onity carmen gain.
S) High worrege gar-
Ay eatfona
Vay
base.
4 hier
hale cycle, foaca
junction incre
Ge which cause
2g @ - Hence
fom O°
7
are Bn - phage
o Conity =D.
cenitkr base junction decreases. “thip
makes decrease eh Gmitter
Cf.) ftom eg —O-
curent Chee) $0,
collector decreases
i
A. Acie ag. cument Source « Civcuik — deacription
wee
— :
ep R tomoavd bian the Emitter base.
Junction .
Nec — To Revetne bias the collector base
Janction .
be- Source reriptance
ke - Load restgtance-
@Lce — Blocking capacitance which blocs
De
Ce
coupling capacitance which coping
| Remese pote 2
| Bee OC emitter curvert—
ve AC mition ceerren ‘
‘ dol omits ME ACER.
ie > 7
run
Wored
| Mos = yer eh
ig = tic —O@
|
|
of emitier Jonction
increases & fe Which
i tom ey O- Sr, Outpee
| fon ey ©.
negative half
boone
a. Buring
| nature of emiticr ase
Imates decroate of te phicl
output
ig from A @ + Hence,
tron 94-0 -
A, uring fogttive half cycle , forsard
Increases this maker
oe, eee ee
uottage decreases
fonoasd bias
cycle
reeager thi y
Jynetion dee
, cae &. 2°
No tage
case O-
increases
bier nate
|
J 5) Cp, Ce3 Blocking capacitance bili h BE
be
Chase tev 6514
w@
coupling capacitance which coupling 4
a. Migh veollage gain
2: Udyh Curent gain i
Be High — power wr : | woking —
| Mout = Mee + eRe —O 7
tee Bele —@ i,
half cy cle , Foavard b6%¢
Weetor “junction Mhewaue,
hich cauter |
Ss Gnpuk and cutpat ome out g phage C10)
ter teabons
A Widely Used at bmpiior 4. Baring, posse
| nature of bare col
Commen Colleat, (it) nly ot on ete cee ee be
Amp itler — ase OF lee fon ef @ + Hence cubpet Voth,
h% | momaie -fom dnerecon. i@ 63D
cle , foward biar yy
as Buring regative halt ey
collector junction To fonvasd bias input junction
CBase collector] |
i
12) Vee —¥ TW revert bias eutpd junztion
| Clmitey base)
2D kai —> Source resiptunce. j
u) R, —> fowd sresip bon ce C harac tern! ad
) ugh cConrmnt ein.
2) Onity Voltage qn.
a) 6ntgh in put impe dence.
a) Low Output — impedance.
s) dypab and output axe inphase..
Applicaton so
—_
_t) Used for impedance matching C Bu fee) -
im Why ce mode. in twoidely ied th * cumplitier
civeuth SU
pe a. High | ALO tage qe
o: High Curent goin 7
3s High power gain |
q Sultabu : é
itable -for mult - tage co nnech er) oprahng pert
wad (ine
mat be aol lhe middle af
ampli ser
for a circuit Aw ack as an
igtor
eto Blasio
The proper flow of Few nignd collector cumedt
collector cunmt]
Co
and maintainance of proper
collect +o emitter volinge ie Enon as Transigtor
Basing.
Need Rote Sleting 2 an arplkinr civeuite
Opeacting pont” must be chooren at the middle
of the sod line - So, that” follosing conditions
sil get.
A+ Proper yero stgnal collector cument flowe,
2. Minimum bere to erdiver voltage
2. Minimum collector ty erviter voltage.
TTYre of biasing chris
4. Raed vias circuit: s
2, Collector +o bare bins clvcuit.
a Bias circuit with ernitter yesigtance
4 Molinge divider bing circuit (OY potentval
divider bia chcuit (ov @8tt bias
Sut
obreuiite Coy
Univeral biot eivarib>
Stability x-
pees
Ss When the ternperatirre changes (+) atone ton
in veplaced , @perating point CVee,Ie ) nee
fetal for fait ompteston the opetiqg pone
must be Fined -
wethe Procesy Of matirg operating pont independent
of Aernpesature. changes (et) vertation in bansig tox
promoter, ab tno as Stabiliys'on.
| Need. toc ataletligation =
| “The follosing are “He fac toy
the. etabillty of the opmating pont -
that afect
whey ove
ja “Ternperatoure dependents ot Ley
jv a (Ses PSee CPSen
fer P.
|
where
= carmen gate
Be . i
Gee Reetne gatnation GO
\ Me Aoutler for) every We raiving tempe rat
|
| for Geamanium, And for every Se verging
| Acmpaature for Bilicon Wansis tox.
Va. Se changes GiNH change TH Hm PEON,
BWW replacement — of hoatator |) Pichangey
So Te changer.
3- With change in temperature , V, chan.
"| » Yee yet stability -fackib "<8, Sv & Sp
“Se> Rote of change. SF collectos curmentCi)}
bith wapect “to change. in -eveue Kattuscdhion
currenk —C Tee) at constant Vee and B
ons
Leo
S=
loa Vee Se fp ,
eS a> Ble fF change. of Te with’ respect fang
9 Vee ot constant Ia kB f
Sue OTe | wen 0
=m
Be es be Ba conatadd 5, ,
|e Ke jane wl
Sp» Rate ofe change. et Bat comtant To,
| be Ve . ij
\ e. ato
PTS e
. Foleo i Nag Pconsted:
4.for good Stabilily | the eal ty factocg
SS, and Sp must be low \ . >
coe ee
Fk ig make Whe of 4empe rotu re éonsib-
| we. devices . Such a1 diodes ) Pansigtos | eer —
| eto semigtorg
/
tn Buch @ 4 so teep
colle ctvs cumenk Covutank irrespective of
| -
| Vartation wn Too, Vge and p- Difte rent
compensation 4echintguer ave —
4. Picde Comperuation .
i] @. Therm idtov comperua hon
Sensi eto compensation .
3.
Piode compensation rechinique >
Ae Nee
se A diode ik comhected i a oF rn ee, |
IN Revetped bias
base to emitter. “the dicde and the unig be canard ee eae reese
ere ;
; %& Game matedal . Hence 1 the yatio of * As temperature inemaseg Te ine reasy
WMerease of verge gatuiation cunenk in the [to toemare in Tey.
a ae Famaietor will be game AS temperature incowares Rp decwase
: Gt %m ovens es.
i Hence, 2. becomes constank ichfely mates ae this mates Te and volinge drop acwese f
Va | (Semen | increases.
} : \ye'So, fonoerd giar notre of Bare to om
t Compensation “Techhiigue ;— 1 Sunetion decwaser, Which mateg de cw
i Nec : ; {| m@e.
| So, finally Ge Becomes consrant-
|
L
I
Thermigtos ie a tangducer which has 4
he gate temperature Coe ffterent-
