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Minimization

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Minimization Boolean expression ... – PowerPoint PPT presentation

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Title: Minimization


1
Minimization
  • ??????????????????????
  • ??????????? Boolean expression ???????????????????
    ???????????? (minimization) ????????
  • Boolean algebra
  • Karnaugh map
  • Quine-McCluskey

2
????????????
  • ??????????????????????????????????????????????????
    ????? ?????????? ??? ???????? ?????????????
    ??????????????? ??????
  • 1. ??????????????????????
  • 2. ?????? Karnaugh map
  • 3. ?????????? Quine-McCluskey

3
?????? Boolean algebra
  • - ????????????????????????????? ??? Boolean
    ???????????????????????? ??????????? operation
    (???) ??????????
  • - ???????????????????????? Boolean ????? normal
    form ???? canonical form ?????????????
  • - ?????????? ????????????????????????????????
    ???????????????? ????????????????
  • (?????????????????????)

4
?????? Karnaugh Map
  • Karnaugh map ?????????????????????????????????????
    ?????
  • 1. ????????????????????????????????? input ???
    output
  • ???????????? Karnaugh map 2n n ???????????
  • 2. ?????????????????(0 ???? 1) ?????????
    Karnaugh map
  • 2.1 ???????????????????
  • 2.2 ?????????????????????????? minterm ????
    maxterm
  • 3. ?????????????????????????????? output
    ????????????????????? ??????????
    ???????????????????????????? 2i 1 ? i ? n
    ?????????????????????????????????????? n-i

5
Karnaugh Map
??????????? ?????????
6
Karnaugh Map
?????????
7
Karnaugh Map
?????????
8
Karnaugh Map
?????????
9
Karnaugh Map
?????????????????? Karnaugh Map 1. ????????
Karnaugh map ???????????????????????????? 2.
???????????????????????????? 1 ???? dont care
??????????????????? ???? ??????????? ????
Karnaugh map ?????? 3. ??????????????????????? 1
???? dont care ????????????????????????????
??????????????????????????????????? 2n (n
?????????????????????????????? ???????????????)
4.??????????????????????????????????????????????
???????????????? ?????????????????????????????????
??????????????????????? OR ???
10
Quine-McClusky Method
?????????????????? ??????????????????????? 1.
????? minterm ???????????????????????? 2.
?????????? minterm ???????????????????????????????
????? ?????????????????????????? 1
?????????????????????????? 3. ?????? minterm
????????????????????????? 1 ???
???????????????????????????????????
(???????????????????? -) 4. ??????????????
????????????????????????? 5. ?????????????????????
????????????????????????? ??????????????????????
???????????????????????
11
Quine McClusky Method
6. ???????????????????????????????????????????????
?? Essential Prime Implicant (EPI) ??? Prime
Implicant (PI) ???????????? Prime Implicant
??????????? minterm ????????????? subset ??? PI
????????? Essential Prime Implicant ??? PI
??????????????????????????????? ???????????? PI
?????
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