Trabajo Electronica II

8/16/2019 Trabajo Electronica II

1/15

TRABAJO ELECTRONICA II

AMPLIFICADORES OPERACIONALES

ING. MARTIN GALLO NIEVES

UNIVERSIDAD DE PAMPLONA

SEDE VILLA DEL ROSARIO2016


2/15

AMPLIFICADOR DIFERENCIAL


3/15

Se llama amplii!a"#$ "ie$e%!ial a &% "i'p#'i(i)# *&e amplii!a la "ie$e%!ia e%($e

"#' )#l(a+e' "e e%($a"a, pe$# *&e '&p$ime !&al*&ie$ )#l(a+e !#m-% a "i!a'

e%($a"a'. E' &% !i$!&i(# a%al/i!# !#% "#' e%($a"a' "e%#mi%a"a' e%($a"a

i%)e$'#$a

3 e%($a"a %#4i%)e$'#$a 3 &%a '#la 'ali"a la !&al e' i"ealme%(ep$#p#$!i#%al a la "ie$e%!ia e%($e l#' "#' )#l(a+e', 'e-% la 'i&ie%(e e!&a!i/%5

"#%"e el a!(#$ "e p$#p#$!i#%ali"a" e' la ganancia diferencial "el amplii!a"#$.

Te#$ia

La 'ali"a "e &% amplii!a"#$ "ie$e%!ial e'( "a"a p#$5

"#%"e 3 '#% l#' )#l(a+e' "e e%($a"a 3 e' la a%a%!ia "ie$e%!ial.

Si% em7a$#, e% la p$!(i!a, la a%a%!ia %# e' a7'#l&(ame%(e i&al pa$a la' "#'

e%($a"a'. E'(# 'i%ii!a *&e 'i la' e%($a"a' '#% i&ale', la 'ali"a %# 'e$ !e$#,

!#m# 'e$8a e% el !a'# i"eal. U%a e9p$e'i/% m' $eali'(a pa$a la 'ali"a "e &%

amplii!a"#$ "ie$e%!ial i%!l&3e a'8 &% 'e&%"# (:$mi%#5

"#%"e e' la a%a%!ia e% m#"# !#m-%, e' "e!i$ la a%a%!ia "el "i'p#'i(i)#!&a%"# la' e%($a"a' $e!i7e% el mi'm# )#l(a+e. C#m# l#' amplii!a"#$e'

"ie$e%!iale' 'e &(ili;a% a me%&"# pa$a a%&la$ el $&i"# # l#' )#l(a+e' "e

p#la$i;a!i/% *&e apa$e!e% e% am7a' e%($a"a', p#$ l# e%e$al 'e "e'ea &%a 7a+a

a%a%!ia e% m#"# !#m-%.

S8m7#l# "el Amplii!a"#$ "ie$e%!ial. La'

e%($a"a' i%)e$'#$a 3 %# i%)e$'#$a '#%

'e


4/15

La $ela!i/% "e $e!a;# e% m#"# !#m-% CMRR, 'ila "e Common-mode reject

ratio, 'e "ei%e !#m# la $ela!i/% e%($e la a%a%!ia e% m#"# "ie$e%!ial 3 la

a%a%!ia e% m#"# !#m-% e i%"i!a la !apa!i"a" "el amplii!a"#$ pa$a !a%!ela$

!#% p$e!i'i/% )#l(a+e' *&e '#% !#m&%e' a am7a' e%($a"a'. La $ela!i/% "e

$e!a;# "e m#"# !#m-% 'e "ei%e !#m#5

E% &% amplii!a"#$ "ie$e%!ial pe$e!(ame%(e 'im:($i!#, e' !e$# 3 el CMRR e'

i%i%i(#. De7e #7'e$)a$'e *&e &% amplii!a"#$ "ie$e%!ial e' &%a #$ma m' e%e$al

*&e &% amplii!a"#$ !#% &%a -%i!a e%($a"a.

C#m# la a%a%!ia "ie$e%!ial e9!e"e a la a%a%!ia e% m#"# !#m-%, la CMRR

'e$ &% %-me$# p#'i(i)#, 3 !&a%(# m' al(#, me+#$. La CMRR e' &%a

e'pe!ii!a!i/% m&3 imp#$(a%(e, 3a *&e i%"i!a !&%(# "e la 'e


5/15

E+e$!i!i#

S#l&!i/%5

La 7a'e, el emi'#$ 3 la $e'i'(e%!ia Re #$ma% &%a malla "#%"e5

V7 ?V7 @ V7e ?0 @ V7e ? 40,V

Ie? 40,V.? 2.mA

Tam7ie% 'e (ie%e *&e Ve (ie%e &% )#l(a+e e%($e el %#"# E 3 (ie$$a5

Ve > ReIe4Vee? 0 Ie

?Vee4VeRe

I!1?I!2?Ie2

V!1?V!2?V!!4I!R!?V!!4Ie2HR!

V!? )41.2mAH.? .1V


6/15


7/15

AMPLIFICADOR DARLINTONG

El ($a%'i'(#$ Da$li%(#% e' &% (ip# e'pe!ial "e ($a%'i'(#$ *&e (ie%e &%a al(a

a%a%!ia "e !#$$ie%(e. E'( !#mp&e'(# i%(e$%ame%(e p#$ "#' ($a%'i'(#$e'

7ip#la$e' *&e 'e !#%e!(a% e' !a'!a"a.

E'*&ema amplii!a"#$ Da$li%(#%

El ($a%'i'(#$ Da$li%(#% 3 '& e'($&!(&$a i%(e$%a 4 Ele!($/%i!a .El ($a%'i'(#$ T1

e%($ea la !#$$ie%(e *&e 'ale p#$ '& emi'#$ a la 7a'e "el ($a%'i'(#$ T2.La e!&a!i/%

"e a%a%!ia "e &% ($a%'i'(#$ (8pi!# e'5 IE? 9 IB C#$$ie%(e "e !#le!(#$ e' i&al a

7e(a p#$ la !#$$ie%(e "e 7a'e. E%(#%!e' a%ali;a%"# el $i!#5

E!&a!i/% p$ime$ ($a%'i'(#$ e'5IE1 ? 1HIB1 1

E!&a!i/% 'e&%"# ($a%'i'(#$ e'5IE2? 2HIB2 2

O7'e$)a%"# el e'*&ema "el amplii!a"#$ "a$li%(#%5IE1?IB2

E%(#%!e' &(ili;a%"# la e!&a!i/% 2 3 la e!&a!i/% 'e #7(ie%e5IE2 ? 2HIB2 ? 2HIE1

Reempla;a%"# e!&a!i/% 1IE2 ? 2H 1HIB1

C#m# 'e p&e"e "e"&!i$, e'(e amplii!a"#$ (ie%e &%a a%a%!ia m&!# ma3#$ a la

"e &% ($a%'i'(#$ !#$$ie%(e, p&e' ap$#)e!a la a%a%!ia "e l#' "#' ($a%'i'(#$e' 'e

m&l(ipli!a%

P#$ e+empl#, !#% "#' ($a%'i'(#$e' "e a%a%!ia "e 100, 100H100?100000 "e

a%a%!ia.


8/15

C#m# 'e )e e' &%a a%a%!ia m&3 $a%"e. E% la $eali"a" la a%a%!ia e' me%#$.

Se &(ili;a% ampliame%(e e% !i$!&i(#' e% "#%"e e' %e!e'a$i# !#%($#la$ !a$a'

$a%"e' !#% !#$$ie%(e' m&3 pe*&e


9/15


10/15


11/15


12/15

AMPLIFICADOR EN CASCADA

U% amplii!a"#$ e% !a'!a"a e' &% amplii!a"#$ !#%'($&i"# a pa$(i$ "e &%a 'e$ie "e

amplii!a"#$e', "#%"e !a"a amplii!a"#$ e%)8a '& 'ali"a a la e%($a"a "el

amplii!a"#$ al la"# "e &%a !a"e%a.

FUNCIONAMIENTO

U%a !#%e9i/% e%($e e(apa' "e amplii!a"#$ e' la !#%e9i/% e% !a'!a"a.

B'i!ame%(e &%a !#%e9i/% e% !a'!a"a e' a*&ella e% la !&al la 'ali"a "e &%a

e(apa 'e !#%e!(a a la e%($a"a "e la 'e&%"a e(apa.

APLICACION

La !#%e9i/% e% !a'!a"a p$#p#$!i#%a &%a m&l(ipli!a!i/% "e la a%a%!ia e% !a"a

&%a "e la' e(apa' pa$a (e%e$ &%a ma3#$ a%a%!ia e% (#(al.

ECUACIONES

Se p#"$8a "e!i$ *&e %# a3 &%a e!&a!i/% e'(%"a$ 'i%# ma' 7ie% "epe%"e "e l#'

amplii!a"#$e' *&e 'e !#%e!(e% pa$a "e(e$mi%a$ la 'ali"a %e!e'i(a"a.


13/15

CALCULOS JFET

CALCULOS BJT 1


14/15

CALCULOS BJT 2


15/15

CALCULOS BJT

Documents

Trabajo Electronica II