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5.4 BUTTERWORTH-LAAGLAATFILTER-AMPLITUDERESPONS<br />

Volgens definisie word die amplituderespons van 'n n de -orde-Butterworth-laaglaatfilter wat<br />

gedenormaliseer is tot 'n -3dB-deurlaatband-afsnyfrekwensie van ωp, gegee deur:<br />

1<br />

H ( j<br />

) <br />

2n<br />

<br />

1<br />

<br />

p <br />

6. BOU FILTERS<br />

Hier is 'n aantal boublokke wat gestapel kan word om die voortspruitende filter te ontwerp en te maak<br />

Eerste-orde- algemenetipe-filter:<br />

1 <br />

R1<br />

R<br />

s<br />

R<br />

<br />

<br />

R C <br />

<br />

<br />

<br />

1 R2<br />

R<br />

4<br />

H0<br />

( s)<br />

<br />

<br />

R3<br />

R 1<br />

4 s <br />

R C<br />

R <br />

met 3 word dit 'n laaglaatfilter.<br />

met<br />

R1R4 R2R3<br />

word dit 'n hoëdeurlaatfilter.<br />

Eerste-orde-laaglaatfilter<br />

<br />

1<br />

<br />

<br />

RF<br />

<br />

( )<br />

RA<br />

H s <br />

<br />

RCs 1<br />

2<br />

3<br />

4<br />

<br />

<br />

<br />

<br />

22

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