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7/23/2019 AD DA pretvorba
http://slidepdf.com/reader/full/ad-da-pretvorba 1/3
DIGITALNI SKLOPOVI I UPRAVLJANJE
LABORATORIJSKA VJEŽBA BR. 9
Analogno – d ig i ta lna i d ig i ta lno – analogna pretvorba
U ovoj vježbi simulirat emo A! " !A #retvorbu.
$a ula% %a a&alo'&i si'&al (V I$) A!*"a s#oji i%mje&i+&isi&us&i i%vor, am#litu-e V i /re0ve&1ije 2 3%.
!a bi mo'li #romatrati ta0av &a#o& (ima i #o%itiv&e i&e'ativ&e vrije-&osti) &a ula%e %a re/ere&t&i &a#o& A!*"a i!A*"a #otreb&o je -ovesti istosmjer&o &a#aja&je o- 4 5V.Bu-ui -a u E6B"u &e #ostoji ta0av i%vor &a#aja&ja i%vestemo 'a serijs0im s#aja&jem -va i%vora o- 5 V, #rema sli1i7
I%la%e !8"! i% A!*"a s#ojite &a ula% &a#o&s0o' !A*"a.$a ula% SO* A!*"a #otreb&o je -ovesti i%vor #ravo0ut&o'&a#o&a (ta0t) 0oji ete mije&jati #rema tabli1i, simulirajuira%li+ite /re0ve&1ije u%or0ova&ja a&alo'&o' si'&ala.$a os1ilos0o# s#ojite ula%&i si&us&i si'&al i i%la%&i si'&al i%!A*"a.
Potav!e o"ilo!opa#
$amjesti vreme&s0u ba%u os1ilos0o#a &a 8.28 se1: -iv (ta0o -ase &a %aslo&u vi-i je-&a #erio-a i%mje&i+&o' si&us&o' &a#o&a).Ta0o;er s#usti #ri0a% si'&ala s ula%a B (-i'ital&i i%la%) ta0o -a se#re0la#aju si'&ali s oba ula%a.
Pri$%er i&gleda &alona o"ilo!opa
'adata!#
<ostavi /re0ve&1iju u%or0ova&ja (i%vor #ravo0ut&o' &a#o&a) &a %a-a&e vrije-&osti i %a sva0islu+aj #re1rtaj &a#o& sa os1ilos0o#a.
O%&a+i streli1om tre&ut0e u%or0ova&ja si'&ala %a slu+ajeve 2.), =.), >.) i .).
7/23/2019 AD DA pretvorba
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Re&(ltati $%eren%a#
2.) / u% ? 2 3% =.) / u% ? = 3%
>.) / u% ? 3% .) / u% ? 28 3%
5.) / u% ? 288 3%
@to je /re0ve&1ija u%or0ova&ja
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$a 0oji se #retvara+ o-&osi /re0ve&1ija u%or0ova&ja
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Ka0o /re0e&1ija u%or0ova&ja utje+e &a i%'le- i%la%&o' si'&ala
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