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CHAPTER 18 FOURIER TRANSFORM

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CHAPTER 18 FOURIER TRANSFORM Fourier Transform and Inverse-Fourier Transform Fourier transform ... – PowerPoint PPT presentation

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Title: CHAPTER 18 FOURIER TRANSFORM


1
CHAPTER 18 FOURIER TRANSFORM
2
Fourier Transform and Inverse-Fourier Transform
  • Fourier transform
  • ????????????????????????? ???????????????????????
  • Inverse-Fourier transform

3
??????????????? Fourier Transform
  • ????????????? Fourier transform
    ?????????????????????????? (periodic signal)
    ????????????????? (non-periodic signal)
  • ????????????????????????????(????????????)
    ????????????? Fourier transform ??? ????

4
Circuit Applications
  • ???????????? Fourier series ??????????????
    Fourier transform ?????????????????????? output
    ??????? ?????????? input ??? transfer function
    ???????????? (???????????????????????)
  • ??????????????????? Fourier transform
    ???????????????????????? Fourier series
    ???????????????????????????????????????????????
  • ???????????????????????????????????????????
    (?????????????????????????????????????????????????
    ?????! ??????????????? diode ???)

5
  • ???????????????????????? Fourier transform
    ??????????? ????????????? transfer function
    ??????? ???????????????????? ????
  • ??????? 1 ????????????????
  • ????? ??? impulse response ???????
  • ??????? 2 ?????

6
  • ??????? 3 ???????????????????????? ????????????
  • ?? impedance ??? component ???????? ??????
  • ???????????
  • ??? input ??? output ?????????? ???
    ??? ???????? ?????????
    ?????????????????? input ??? output
    ???????????????????????????? ?????????????????????
    ??????????

7
  • ????????????????????? output ?????????? input
    ????? ???
  • ????? ??? Fourier transform ?????????
    input ????????????????????
  • ??????????????? Example 18.7 ???? 834 Example
    18.8 ???? 835 ??????
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