Cation
exit
ic
El
Communicatton System
Vaite
Sourae
yW
Voce 300H-3.5ktz
Tanpduder
at
SoUrce
Audio; 20H 2 klz
Sheer
hyeea
|ormation
Tx
Au
Recu'ver
Chann
Destinati
Tranaduter
Rx
nB
o - y.S HM2
trom TranAmiter to Recaiver.
or
everywhere.
Basic Block diagram
Vdeo
on
dtination
sInlomatton
tr
Communi
sourCe to
oTranamiasibn
ProCas
a
ec
trom
is
ch
CommuniCation
s
Intyoduction to Communi'cation
ar
SourCa TranaduCaY Converta Phycal igna into electital e9uivalewt
Le
which siqnad ia Propagated
channa ip the medium throu
Recarver Trankducar Converta luctrica ignal into Physical signa euivaant,
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
General r e d CommuUniCation
iA PrelMered for
short
diatanca
CommUw Caton
wirelasa
Communication
sytem:-
El
EMA
ec
Block diaqam
tr
on
ic
s
Communication stem.
Warelass communi Cation Ja Prehered for ong diatanca
in
Jn which signad ia Propa^ated
through t r e Sbace.
angua
Jchaed
ch
SourC
Modular
D DeModulata
at
SoUra
Recaiver
Tanadu
Destinat
nB
yW
Drdormabi
Le
Jp ewred.
ar
for om
long diztance
Generally tor
Commitation
hrough
tras
sbace Modulation
Antenna
heisht
For Prober TYanam'anion
through an
s
ec
at
nB
Voila: 3oo2-3.S kt2
Y
25k
Le
4x 3x
Same
as lizhe.
Modulation ia the Procaza
increaging te treuney
the Signal to reduca
antenna heisht
ar
h e 3x1o
elactvomanakie
yW
sig
t- 3KHz
m
El
ch
htmi
he
2
X 3xo$
antenna.
Velouity
Exa
ht3x0
and Recaption
Minimumyheisht
Y
a
enne
otn kantenna
Antenna
2S
3 Mz
on
Reducing
3k
tr
1.
ation:-
ic
Basic Need Modu
O
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
(2
2. Multiening
Lt is the P¥otaAA
Audio 1
(20tt2-20 kM)
muultapa number
C20e-2 kM
s
Tree
on
Auio 2-
Audio 3 -
Singa chann at h e Same time.
thouE modudation multiaxing
tr
(20te-2o kMe)
ec
Generall
channa
ic
ranamiaa1on o
ignals through a
)
El
i p n o OAihl.
purpore o ultplaing.
modultion ja
nB
yW
F o r uuire lass Communication
yeaded to reduta antenna
at
tor the
Le
ar
oY muhleing PurpAa
ch
Tn wired CommuniCation modulatton ia neaded
heiskt
and
32/7
Audio i
(20H2 2okte)
92.7
ree
FM
93Se ( Channs)
3
Audio 2
(20 H2-20 ke) E n
Avdio 3
(20H2-2o kz)
FM
MMZ
Based
on
Communication
a
Commucation ckannal,
a
mode
ode otronsmiAton
channels
netwok
ave
a
dwded i t o two
ec
Cotegorie.
Communicatabn
on
acCompiah ed by means o
acro
ic
normatten
tr
The transmissien
s
Commuwcation channels:
ch
El
Communication channelsA
at
Guided Probazation
Cat channds
yW
Broad
Co-aal Calla
Mobs adio channals
nB
Tusted Pair Casl
Ungidad ar Fre probayahan
tibera
Satallrte chamel
Le
ar
optial
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
The
The chavackrjctic JmpedancA ia 90
aa
T t Can aLow
signaauin
11o
Tlted Pair cahla
a
PVC
o
sheath.
o-200
yW
ch
at
Supbonta on
TanAmipion aalactrica sizna
Cabl
Seberated by
aa
Cobber
a
ue
and
aktenuoakton.
X
Cobber
Conducto
Eig 1. Tuasted
inner Conductor
Consist o an
dielectric ingulating
ar
Co-axial
Le
A4
nB
Co-axia Cahla -
kHz Banduidh, without my
El
Tuted Pair Cabla
tr
en Cased in
Cosiat
ec
A
s
uikes
ic
Palys to igne tranamjaaion.
which
each
two Salid Cobber Conductaa ench
uping
bult
channl
» The talephone
on
Tuuated Poir Cala
outer Conductor
materi.
mada o
and n
Pair Cable
outer Conductor
The inner Conductr h
Cobper
Coated etal.
made
o
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
9
and
ilica
Pure
claddin
gla4A
are
both mada
and the Jackat
i
GH.
majr dikadvantase o opt
yW
The
CLED
laper)
the Rane
Le
ar
nB
Cost.
tbe Cahl
at
o
oera banduidth n
cAadain
Light
soUrca
ch
obtica tbre
mada
El
oPatie.
o
ec
Coe
tr
byathin Patective Tacket.
The
probagakinq wave
s
Coines
cladding
a
ic
Cantad Cove wutin which tha
and Core a
Surounded b a
ayer, ushith a p e sumounded
Conpiat
on
It
F
3
optica ftber
uithout
waes
yting
a
bhyaic
ic
Tranaport Eleetromagnetic
s
unguided or rea Shac Probzatin
Conductor
may be suda pobagokron, Trobospheric
Psobazation EM
Pcsatio, Lonoatherie bropagation and Spac praposatron
tr
on
wave
The
much Coatly.
El
InibiaSatub a
ec
Tt ia yaed fo long dxtanca tanamisnion.
bvoadcat
wireless
in
Unguded Probagation *
adio and Tala union signals.
Propataon
channils tar M
at
ch
yged
Prouwding
broad- Axea
Coverage
nB
For
Fox
yW
alss ed nmobil Communicatiouy
t
and
4-Hz
band
both
a
tar sataldite
for tha downLink.
Le
uplink
ar
Satallte channa
ced.
The
bobular tre9uany
The m
n
.
Continenta
and
Communicabion
intertonainenta
da
6
Gte
t
find tre quanties contained
ec
tr
xt) FTxf
on
Aed to
Fourier Tranadorm is bapically
b ven ime domain siqnad.
ic
s
Fourer Tansorm
Prek
voia sig-
Shectrm
at
Atouptic
ch
El
xE)
Anakyser
ar
nB
yW
wVhM
Spectrum Anauser shoua sbectrum a
Le
,IxcE|
30ok
3-5kle
sig.
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
Neac o Fouier TranAlm
ic
s
Ampliba
ec
VVVVVV
tr
on
Amlitud
V
Le
ar
nB
yW
at
ch
El
MMMwww%
MOMOMOAMOMMMMOMOAMOMOAA
Wew t o Time
Domain
Amp
time
(2
(
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
(
Sin(xf t) x zft
s
xf = A
At sinc[ft]
1
ec
Sinc[ft]
tr
xfy =
on
ic
xcf
yW
Highest
Rectangudar Pule
Le
Bw
=
ar
Signal Bandwidth
Contains
nB
Rectangular Pulse
at
ch
El
t r l,2,t3-.
=
entire band
+ve
frequ4nty-
trequencias
lowest
+ve
de
-o
frequanty
to +0o
s
Band Lu'miting ProcesA
Psober TranamiAsion
o
a
signa
on
channa BanduidthSignad Banduiat
tr
trangmiauion o Rectangular Pulse
banduidh aja re9uired
but fora racti
should be ivite
channe banduidth
| HC
Low Pass&
El
a channal haing o
at
ch
Filter
Tewred.
yW
Thereove band Limiking
To
LPF
Outbut
AT
Band imited
ar
nB
band imik a signal all ita Signiicaw
tre qiny Componenta has to be retained
inianiitant fre9uenty Component has
to b
lumineked.
Le
and
AA
ec
For
Band Unimited
ic
for
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
signad Prober Low
Jto
ch
at
yW
nB
ar
tilter CLPF) u u he
availasko chann bandmidth in ctentt
El
URe
manner
Le
Pas8
ec
Ued.
allow u
treuancies wul be low freguencias
tr
a
ic
signad Signiicant
Generally tor
bandimit
therere band
these
a
on
othe Signad.
Bandlimiting
Baralimiting
tatal strengh
s
SigniCant te9uentias Contains almopt 95/-99/
Vaic30on-3-5kMa
Avlio
2o He/- 20 k2
video
o Sz
s
Band Lu'miting ProcesA
Psober TranamiAsion
o
a
signa
on
channa BanduidthSignad Banduiat
tr
trangmiauion o Rectangular Pulse
banduidh aja re9uired
but fora racti
should be ivite
channe banduidth
| HC
Low Pass&
El
a channal haing o
at
ch
Filter
Tewred.
yW
Thereove band Limiking
To
LPF
Outbut
AT
Band imited
ar
nB
band imik a signal all ita Signiicaw
tre qiny Componenta has to be retained
inianiitant fre9uenty Component has
to b
lumineked.
Le
and
AA
ec
For
Band Unimited
ic
for
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
signad Prober Low
Jto
ch
at
yW
nB
ar
tilter CLPF) u u he
availasko chann bandmidth in ctentt
El
URe
manner
Le
Pas8
ec
Ued.
allow u
treuancies wul be low freguencias
tr
a
ic
signad Signiicant
Generally tor
bandimit
therere band
these
a
on
othe Signad.
Bandlimiting
Baralimiting
tatal strengh
s
SigniCant te9uentias Contains almopt 95/-99/
Vaic30on-3-5kMa
Avlio
2o He/- 20 k2
video
o Sz
s
ic
on
tr
ec
El
ch
at
ar
nB
yW
3
Le
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
s
ic
ad a
on
tr
ec
El
ch
at
yW
nB
ar
Le
at
(3
FT
xtf)
on
t)
ic
s
3. Modulation Proper
tr
then
ec
x(f-£) + x(f+f)
Le
ar
nB
yW
at
ch
El
2
s
Modulation:(Baseband Passband aignada)
ic
Concept
baseband signak,
saseband
Sana Can
ex.
Vaica
net
ete
drecky throush
an
antenna
X
tre9uencies
(
z
iooRHE )
Paband or Band Pas Sand.
yW
known os
ky)
El
ch
SgniCant igher
ignd Conpia
wideo
at
a
Audio,
tranamitted
Voia; 30eH2 3.r kna
Audio; 20e 20 KM2
Video *o SMMz
a
,
tr
as
ec
knoun
to
on
to
Ta sugned Conpizt q signiiCant loutre quancies (Up
Mt)
BandPan
si
Le
ar
nB
Paka snd Can be tranamilted
Band
directly throush an ankenna
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
(2
Bandpas*
ABSUme meaga
we Can Sy
ian.
siga mt
easeband Signa
Mf
ec
m
at
MS
C
Le
JVVVVIUVVU
ar
AAMAMA
Ae Cgn(arft)
yW
-
nB
uignact)
-
to k u 2
tokM2
Let
IMH= ]00o KMz
FT
Baaeband
Lo Pa4s ign
El
ch
FT
Cabrier
s
or
**in
ic
HF) Yesion
Lower fre quanty (LF)
on
toHighex tre quan
Converted into
tranalaked from
ign J
the
tr
ey modlation
Band Paf
SAgn
on
ic
s
Modulated signa st) = mtt). cit)
S
tr
FT
99o k looo
lolo ka
modulation Dinakion!n
yW
Modulat'on js the Proass
at
ch
El
ec
- 1o loh-leooh-90ok
which
(e Amituda Freqany ov Phape)
on
charackeratic faramater
Camier ja vaed inearly
th
Le
ar
nB
wuith ebect to memage signod Amplitud Vavaations.
!
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
AAUme message
igna
mt)
and
given
at
nB
be
a
re writen
AM Modwator
a»
ar
eO Can
c
Kamt] Caaarft
A+Ka
where ka: Amplitude Senpitrui
=
yW
SamA)
a
ch
A Signd
ezpreguion
aier signal
El
cLt)= A Cop artt
Genesad
Vaed
ic
to
respect
uwih
on
Jinear
ineary
tr
i
ProCana
the
Anitude C a r l e r d
Variationa
measaga Signa Amktuda
which
in
ec
Tt
the
s
Amplituda Modulation (AM):
Le
SAm4)= Ac CgAR +Akamtt) Casartt
Cavwier ina
Medudaed sigal
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
T
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
(3
ic
beComes
ar
nB
yW
at
ch
El
ec
tr
A[ scf-t)+ Sci+4] + A[t-4)+H¢f«£)
Le
s
ee,
yow es
on
Take foure Tranpom
Amitui modulated signal Santt)
s
Fov Platting reany spectom
al
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
sing treuandy Campome,
ic
Cowtai
The mesiage. signa
s
Singla tone AM
=
Ac Cop artt
Ae+amuks CoaaTft
=
at
SAmt)
El
kow that
ch
We
ct)
ec
and
tr
AgAUme mlt) = Am Co2T tint
repulting
on
modulated ignad ia knam ad inga tone AM
AM.
then t h
Le
ar
nB
yW
SAMLA)= A+KaAm Corant ] Coparft
I
ka An
Aoddation dnde o A)
Under medulakion
I
Criti Mod«Iation
over over Modulation
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
M
ot
O
I
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
1
For
o
(No
modulation)
ic
s
Power o AM
For e=
tr
on
eA
2R
A s P increaes trom
ec
Fuss=s (A/aR A8R
sa=Fusat Fiss A+
A=
BR
4R
8R A
2
yW
nB
ar
where:
Alter modulation
Power Belore modndation
P:
Cartier Power
:
Carier
oto1
dnereaed
at
]
R
tatal At Power a
50.
El
ch
4-R
Le
(loo/. moduNation)
11
af
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
1
Power
Tranemiter Power n nven
know th
on
we
madulation.
El
ec
tr
So
yoow.
ic
Find AM ranAmiter Power uith 307
ven
s
An unmodulated Am tansmiter
.
ch
yo0fe+
ar
w
Le
S62
nB
yeow 1t(oo
yW
0.9>
at
Peyoow
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
se1oo w
R
ic
on
Gaven
tatal Am trantmitter Power
o 6
we
ch
El
ec
fuu(, AA.
8R 2RUX
yW
5S.ssw
at
2
nB
Pets= Sss.s+ l00
ar
6ssSSW
Le
S
given by loow
tr
Fnd
totalsideband Power s
s
2. Fos an A
AM
2R
ic
ko.9,41A,
414,14?
at
ch
El
ec
tr
when
9.43A
yW
T
O'5.
s
1oA utth e
o:
hat
nB
know
ar
we
iA ivn y
AM transmiter Cumrent wwt
Le
Find
anamiter cumet
on
3. An Am
sign o
aind
CoAaT xio' tA
sig
2 Cas 6Txidt with reos.
5
Am Banduidh
Amibude modulated by
antenna Reaistanta
s
A Cartier
a
ic
9.
meuaz
zven by lo.
ec
tr
hny
A2
t3ky2
.S
w
=
2xt
Carrer fower
2x3ka
ar
ci
Am
fe = A=
2R
Le
c
, R= lo
at
2 Coa GTx*
nB
m)
jooo K
ch
A SVf=|o°
El
Civ
1-41 w
yW
S
on
CAeier Power, tata Power, Sidaband Powe,
and lat trequAntSectmm.
,
6kMz
2Xlo
So= e -Pe
=
l141-I-2
l-2sw
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
1
at
yW
nB
ar
Le
on
tr
ec
El
ch
1
11
s
ic
1
Parametena A
a l he
we kro
CoA 2000rt +5 es 2400 Xt
Hat
SAn)
Ae oAaft
Ae lov, leooz
+
Ae ConrCt+f)t + Ae
2
ec
So
+Io
2f2000
= 2xfn
By
W
1
2X 2 0 Mz
ar
n
ci A &.
Jo
Le
2x1
arct-fJt
.
at
eleooM2
A
o
El
ind
5 CoAI6oort
:
tr
on
SA)
ic
s
An Am signad a
ch
.
Sow
24
yo8 Mz
tiv) ee= - e 7s-So
2s
fA= 33-33/.
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
1
at
1
1
yW
nB
ar
Le
on
tr
ec
El
ch
11
s
ic
(
Am,Coartn, t
+
AmCoA axtut
that
A[ Ramt] Cosar£
nB
AAUme
s
yW
at
SA4)
ic
ec
Khow
=
mult. tone Am.
a
e reaulting
El
We
mt)
known
tre9eny
ch
Aszume
s
one
on
modulated Signa
Jthan
mare
tr
Multi-tone AmTmeAage
mesge aigna Contains
KaAm=
Ka Am
Le
ar
SA4)= Ai+r conar fnt+
Ca atnt] Caaaxft
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
+A
Marfet Caa ar fat
s
SAt)A conarft + An cgsarkt toAarf
coa ar Cf+f t + A cos ar (f-t,)*
ic
A copartt + A
VSB-
on
t+e
ar (f+
cok
LSB-1
Cos ar Cfe-tm)
tr
USB-2
El
ec
AAsUme 7
Ls8-
yW
=
(+n)- -+m)
nB
2tm
2tma
ar
Bandwuidh
2xihat treund
Le
AM
at
ch
A
meAA
na
A
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
s
ic
on
tr
ec
El
ch
1
1
Le
ar
nB
yW
at
1
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
19
1
1
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
11
1
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
(
AM ModuWatovA:are
Known
AM
as
modulatoqs,
on
Waves
ic
s
The ciruts wuich are Used tor the Generation o Amlitude Modulakes
tr
O Square laus modulakar
ec
Swtthing Me dudatrr
ch
dioda
thi cirtut a squa law deuica ike
s knoun a d Squarelaw modlator,
mt)
therafr
BPF
SA
nB
Dewca
yW
Diod
Square
ed
at
n
El
Sruare law Moduotr!-
O
Le
LoCa oCiAatr
ar
ACoar£t
Fiyi.
Suare
law Modudatar
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
Vo
inear
Jinesr
ic
( law
Square aw
Vi
on
Squave
s
Vo
V
tr
VA
V,a,V+aV +a, v+
ch
genermte
we e n e n b
Oberata n
Now
strength ofactial merage ignad j
at
and
he
Carmier
Squareas
Conyaider
h
Sum
ar
eeented by V and t
Le
uuth
th
strengh
a
much
Sma
dibde Can be
yW
kvow that
unear char.
nB
We
-
El
At low valtags : suare laus ehar.
At igh valkagus :
--
ec
ioda chamckeratie
characteiatit rezion.
mesAa Sgn
Camer signa
nea
and
peak Volkage j
s
Ac Coa r t
ic
=mt)+
C)
The outpuk a squae laus dawca
on
V= mt) +
ch
,+V
El
Consider onlytirat two tema
ec
tr
zvenb
at
amt+ AcoAar£t)+mt+Ae (grarf+)
Le
ar
nB
yW
a(m+ ACosarf+)+ /
m+ Acanix +2Am
x
xEA)
Reapons
o
BPF
sa apliedn
BPF honld be
as
shawn in
tase
s
( e v)
ic
The
dioda
outpuk
on
The
=
nB
SAm)= a,Ae
SAt4)
th
i
sigsign
modulakd
SAmt)
aACA rtt+ 2a,Ae mt) CoA r t
yW
Sa)
+
2 Mt)| Cas art
Ati+KamA)] Coxa t |
ar
ePop
wwe
at
tlter ontput
Le
Band Paas
ch
El
ec
tr
HC
whe
A
, Ae
ka 2a(Am
ty)
a
'Senitru
wuh hi
Perdamed
tr
square Law demodlator
Envelohe datectar
Aouin
helf tallouing
on
damoduatora ,
O
s
Can be
ic
Demodudation of AM
Demoduation o AM Sagnals
datecto
Sunchronaw detec.tor or coherent datector 3 Ay Val
ec
El
Demodulatrr!
ch
Square lau
at
O
0ibde
o
Dewce
LPF
mt
Le
ar
nB
1
yW
Square law
SA
demoddatr
E.BlotKdiagram Suare law
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
Asigna
expsemion
s
Genera
Ac Coar tt + Ackamtt) Cosant
SANL&)= A[+ kam] Coaarit
rhented &4
on
i
deuca eufuk
tr
Squaye lau
ec
+ Aekamit) (oxartt|+A.Cgaartt+ Aekamlt)Caaa£*
oiarit
ACartt + Akmt) coaar]+A cOsinft +Ar
+2Akamk) Cosat
ch
at
yW
nB
X
ar
,
El
AAaKtt
Le
Let
2
ic
We Know
2
X
-..
X
1
z
+
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
zn z|»
should
N
be high t
ferdect re Construetion
s
that meand should be Very ow.
be o-2
=
2/.
ic
should
igh
So that
nat
Prea
damodudakton.
Le
ar
nB
yW
trr Am
24k
2t0-2
that meAns 987. Power Wasted
diataibukion shousd be
square law demodlatar t
fower
El
tent
ch
for
at
u
ec
Sow, eieny wl be Ver dow,
tr
on
(0
s
Envelope Detector
demodlation AM
ic
ysed tur tha
Tt Ja veSima and cheaper.
+ve
o t aphlied signal and produtes
tr
detector (ED) extact
en
at the output.
Can be
ted
tor FsI
ch
Rs
c R
at
SA4)
datector an be
F>I
V
Envalope Dekecto
deaigned
uith t
halp o
daoda 4
Capaiter
as
shown in
Le
En velope
ar
nB
Eip
tales tor
yW
Vi
Tt
El
Envelobe datectr
ec
Envelope
ne.
on
Envelobe datector is
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
AMUme dibde ja doa
Rlo
» Sc (shot Cirtu)
PN
R:B
oc (oben chrut)
dnhut E D a
a
sinyaaida wave
when t=ot (Greater than zero)
PN
F8
ec
be elairad
f.
Re
ch
Caje tiy
Can
El
ED
woing
atallows
tr
shown in tisa.
Now the
t
on
ARAUMe the
Righ
s
F.B
ic
PN
3.C
V
at
Time Canatnt
Cape cii) when t= t
Le
ar
PN R B
nB
yW
RCshoudd be Smadl, So hat Cabatitr char aatowarda nput.
0C
HE
(W)
ic E
s
on
tr
ec
El
ch
at
yW
nB
ar
Le
Vi
-V.
at
ED inut
nB
ar
A1+ km4] Conar
yW
VCoaat
Le
NOTE
ch
El
ec
tr
on
ic
s
For Projer envelope datection Rsc showld be
mall and Rc shondd be hign.
A[1+Kam
-
Act Ackamtt)
ang threush abacdk
SAnl4)
=
ka mt)
Ac[1+ M] Coa arft
5v
AAAUm ka=|
at
I+kam
Sv
yW
-
SA
El
+ve.
ch
Care ci)
Should be
that mean
CCxibica
yoduaion )
Cape cii) AAAUme ka
SAH
ov
Itank)
Le
ar
nB
-yv
1+Kam
ec
AcC+ kam4] Should be +e
tr
tos envelobe datector
I+kamtt)
Asume Ka=
s
Caseti)
know t h a
on
We
ic
Impo.tanCa Amplitude Sensitiuity Cka)
over modulated)
CUnder modsakion
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
P.
Le
aM
Ros
Should
re
meAa signad,
congtrueton
bPerack
in both
Synchronous
ic
Loca
tr
Perdact
tre queny
and
or We
oAcNatar outtut
Phae w h reapeat
ec
For
Am Sna,
on
Syndhronous dateckor ip sed tor the demo duation
Can Say to e CoveY meAAg Signal mut).
s
Synchronouk Detector or Coherent datector:
ch
El
to trangmiter Carries.
SAnt
LPF
mt)
yW
at
MuObie
Coherent datector
Le
ar
nB
LoLoaloscillatar
YouTube Video Link, LearnByWatchElectronics, Teacher: Raj Kumar Thenua (www.rkthenua.in)
+
ro
ct
chPlar
El
e
at
yW
nB
ar
Le
cs
ni
easiy
Synchronization additional Cirtutar A
Ac CoAartet
on
A ka m(t) CA AT tt
+
for Loc oA Clator output
El
Nou ConAider two Ca
tr
A + Kamt)] Cosxft+
ec
=
to mantain
e d k h maks Synekronoa
datector vera Ccovna
SA&)
but
ic
Pha
Can be maintained
s
Fre9uaney Synchronizatton
yW
SAA.CLO)ojp
ar
nB
=A Co2xft
Le
mulojp
at
ch
Case ci AAAUme Lo output = AcCokant (Pexdect Synehronigotion)
+
A
kamt) Ca
ax fet
2
s
ic
on
tr
ec
El
ch
at
yW
nB
ar
Le
-