Rfic Project

8/18/2019 Rfic Project

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2.44 GHZ LOW

NOISE AMPLIFIERDESIGN

(LNA)

YASYA VALLABHANENI

DHARIT SURA


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RFIC BLOCK

• Amplify very weak signals eg!"ap#$re% &y An#enna'• (ey ")mp)nen# pla"e% a# #*e fr)n# en% )f #*e ra%i) re"eiver "ir"$i#• N)ise fr)m #*e s$&se+$en# re"eiver "*ain is re%$"e% &y #*e gain )f LNA

APPLICATIONS: Use% in vari)$s appli"a#i)ns like IS, Ra%i)- .ell$lar/0.SHan%se#s- 10S Re"eivers- .)r%less 0*)nes- 2ireless LANs- 2ireless Da#a-

LNA

subsequent

LNA frontend G

NF NF NF

1−+=


3/28

OBJECTIVE OF DESIGN

3pera#e )ver 4566 1*7 2ifi

Appli"a#i)ns'

A"*ieve a g))% n)ise perf)rman"e

Have a g))% lineari#y perf)rman"e

.)ns$me minim$m p)wer


4/28

LNA DESIGN CONSIDERATIONS

N)ise perf)rman"e

0)wer #ransfer

Impe%an"e ma#"*ing

0)wer ")ns$mp#i)n Ban%wi%#*

S#a&ili#y

Lineari#y


5/28

REQUIRED SPECIFICATIONS OF OUR DESIGN

PARAMETER SPECIFICATIONS UNITS

8re+$en"y 4566 1*7

N)ise 8ig$re 945: %B 1ain ;: %B

S)$r"e/L)a% Impe%an"e := 3*ms

OBJECTIVE: To design an Ind!"o# So#!e Degene#a"ed LNA "o $ee""%e s&e!i'i!a"ions o"(ined 'o# IEEE)*+,--

Te!%no(og. Pa#a$e"e#s: /0*,12 30+,+2405,52 "o60-,56$2

70*,5889V,s2 V"%*0*,*);V26?F9$


6/28

BASIC SC@EMATIC OF LNA

COMPONENT DESCRIPTION

@Se# #*e res)nan"e fre+$en"y #) 45661*7

@,a#"*es inp$# impe%an"e

@T$ne% )$#p$# in"reases gain an% w)rks as Ban% 0ass 8il#er wi#*

@S)$r"e Impe%an"e

,@Nm)s #ransis#)r wi#* =5$m #e"*n)l)gy

Lg


7/28

DESIGN EQUATIONS

gs

sm

gs

s g inC

L g

sC L L s Z +++=

1)(

gs s g C L L )(120

+

=ω

Inp$# Impe%an"e ,a#"*ing e+$a#i)ns

in@Rs

s

gs

sm RC

L g =

Effe"#ive Trans")n%$"#an"e

)()(1

)(

2

s g gs sm gs s

m

in s

gsm

s

out eff

L LC s L g C R s

g

Z R

sC g

V

I G

++++

=

+

==22

22

2

)(1

)(4

41

0

sm gs s

m s

sm gs s

m

s

m

in

indevice

L g C R g R

L g C R

g kTR

g kT

N G

N G N NF

++=

+

+=

⋅

⋅+=

≈

ω γ

ω

γ

ω ω

N)ise 8ig$reWLC C ox gs

3

2=

s g

s

L L

L NF

++=

≈

γ

ω ω

41

0


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Con"d,

)()(1

)(1

)(1

)(1

2

2

2

2*

11

s g gs gs s sm

s g gs

gs s sm s g gs

gs s sm s g gs

sin

sin

L LC sC R L g s

L LC s

C sR L sg L LC s

C sR L sg L LC s

Z Z

Z Z S

++++

++

=

++++

−+++

=

+

−=

)()(1

22

221

s g gs sm gs s

Lm Leff

L LC s L g C R s

R g RGS

++++

==

0)wer #ransfer in %egenera#e "ir"$i#

C$ali#y 8a"#)r

T s s R L ω =

In%$"#)r %esign e+$a#i)ns


9/28

Con"d

T gsox

V V V L

W C V I ! 2)(

2−==

µ

)/1(

132

0

22

s g s

s

L L L

R L

! +××∝ ω µ

1||2

||||||1

2112

22

11

2

22>

∆+−−=

S S

S S " S

0)wer .)ns$mp#i)n

S#a&ili#y 8a"#)r

?r% 3r%er In#er"ep# 0)in#


10/28

DISADVANTAGES OF BASIC SC@EMATIC

L)w s#a&ili#y

L)w gain

Self &iasing #ransis#)r *as w)rse inp$# refle"#i)n

S


11/28

CURRENT MIRROR CIRCUIT TO INCREASE

GAIN

Adan"ages o' sing

!##en" $i##o# • T*e $se )f "$rren#

mirr)rs in &iasing "an

res$l# in s$peri)r

insensi#ivi#y )f "ir"$i#perf)rman"e #)

varia#i)ns in p)wer

s$pply an%

#empera#$re

• Use% as a l)a%

elemen# in #ransis#)r

amplifiers- #*e *ig*

in"remen#al resis#an"e

)f #*e "$rren# mirr)r

res$l#s in *ig* v)l#age

gain a# l)w p)wer


12/28

SIMULATION RESULTS=NF2KT AND GT?


13/28

DESIGN OF CASCADE STAGE

Ini"ia( Ci#!i"

Diag#a$


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SMALL SIGNAL ANALSIS AND B

ESTIMATIONUsing )pen "ir"$i# #ime ")ns#an# me#*)% we f)$n% #*e &an%wi%#* )f #*e "ir"$i#

fr)m #*e small signal e+$ivalen# m)%el

B2@


15/28

CALCULATION V9S SIMULATED

Pa#a$e"e#s Ca(!(a"ion Si$(a"ion

6FG$m 6==5=:$m

6FG$m :F:$m

5GnH 56:nH

G?Fp8 G:p8

:=)*ms 656nH 654:nH

Pa#a$e"e#s Ca(!(a"ion Si$(a"ion

6FG$m 6==5=:$m

6FG$m :F:$m

5GnH 56:nH

G?Fp8 G:p8

:=)*ms


16/28

SC@EMATIC VIE IN CADENCE


17/28

SIMULATION RESULTS

A. Resp)nse

w< w4

BAND2IDTH@w4>w


18/28

S


19/28

S443$#p$# Refle"#i)n .)effi"ien#'


20/28

NfN)ise 8ig$re'


21/28

(fS#a&ili#y'


22/28

1TTrans%$"er 1ain'


23/28

101ain 0)wer'


24/28

1A1ain Availa&le'


25/28

I0??r% 3r%er In#er"ep# 0)in#'


26/28

ADVANTAGES

Hig* S#a&ili#y

Hig* 1ain

.)ns$mes minim$m 0)wer

1))% lineari#y perf)rman"e


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RESULTS

Pa#a$e"e#s Ta#ge" Si$(a"ed

8re+$en"y 456:1*7 45661*7

N)ise 8ig$re 945:%B G?:5m%B

1ain ;:%B >?5%B


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FUTURE ORK

2e "an re%$"e #*e applie% V)l#age

T*ere&y re%$"ing #*e p)wer ")ns$mp#i)n

f$r#*er

In"rease 1ain

Use s*)r# "*annel ,)sfe#s

Lay)$# Design an% ")mpare #*e s"*ema#i"

parame#ers

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