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INTERPOLATINGADC

  PRESENTED BY

BETTY VARKEYROLL NO:6

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  INTRODUCTION Flash ADC – Less conves!on "!#e

 La$e !n%&" ca%ac!"ance' l!#!"s !n%&"(an)*!)"h Ca&ses &nce"a!n"+ o #e"as"a(!l!"+,

 K!c-(ac- o .ash(ac- %o(le# –In.&ence a%!) "ans!"!ons !n co#%aa"o a" !"s

!n%&",

 Oveco#e (+ %ea#%l!/es a" !"s !n%&", 

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  INTERPOLATION ADC I#%ove#en" o0 %aallel ADC,

In"e#e)!a"e 1eo2coss!n$s ae ecovee)(+ !n"e%ola"!on , C&en" !n"e%ola"!on3ac"!ve4

 vol"a$e !n"e%ola"!on3%ass!ve4, Res!s"!ve !n"e%ola"!on

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 Cons!)e 5 (!" !n"e%ola"!n$ ADC *!"h !n"e%ola"!on

 A#%l!/es ae l!nea a" #!)an$e an)sa"&a"e a" e7"e#es

 VDD8Ve0 

 All co#%aa"os (!ase) 0o sa#e V"h

 Beca&se o0 %e a#%l!/ca"!on o0 s!$nals 9s!n$le "heshol) co#%aa"os can (e s!#%le la"ch

 Theshol) o0 co#%aa"o3la"ch4 s%ace)(e"*een ' V; an) V

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 VOLTA>E 3PASSIVE INTERPOLATION4 )ela+

0o# a#%l!/e o&"%&" "o each co#%aa"o !s)!?een", D&e "o )!?een" es!s"ance an) ca%ac!"ance "o

co#%aa"o !n%&"

 E@&al!1e) (+ a))!n$ se!es es!s"ance

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 < s!$nals v; an) v< &se) "o !n"e%ola"e

s!$nals V

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CONCLUSIONI)eaRe)&ce n(e o0 %ea#%s 9 !ns"ea) !n"e%ola"e (e"*een

%ea#% o&"%&"s

Re)&ce) n(e o0 %ea#%s

Re)&ce) !n%&" ca%ac!"ance  Enhances s!$nal (an)*!)"h

 S!#%le co#%aa"o can (e &se),

Re)&ce) aea' %o*e )!ss!%a"!on

Sa#e n(e o0 la"ches 3

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THAN !O"