Switched-Capacitor Circuits - University of Toronto
Switched-Capacitor Circuits - University of Toronto
Switched-Capacitor Circuits - University of Toronto
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Vi() z<br />
1 C 2<br />
2<br />
<strong>University</strong> <strong>of</strong> <strong>Toronto</strong><br />
First-Order Filter<br />
C 1<br />
–<br />
C 2<br />
1<br />
2<br />
2<br />
1 C 3<br />
C A<br />
1<br />
------ 1<br />
1z<br />
1 –<br />
---------------<br />
–<br />
C A<br />
1<br />
2<br />
Vo() z<br />
Vi() z<br />
Vo() z<br />
C1 1 z 1 – – – <br />
<strong>University</strong> <strong>of</strong> <strong>Toronto</strong><br />
– C3 First-Order Filter<br />
CA 1 z 1 – – Vo() z – C3Vo() z – C2Vi() z C1 1 z 1 –<br />
=<br />
– – Vi() z<br />
C 1<br />
C A<br />
C1+ C2 C1 ------------------ z–<br />
------<br />
CA CA 1 C – ----------------------------------------<br />
3<br />
+ ------ z–<br />
1<br />
<br />
C A<br />
C 2<br />
Hz () Vo z ()<br />
<br />
------ 1–<br />
z– 1+<br />
------ <br />
CA CA ----------- 1 z<br />
Vi() z<br />
1 –<br />
– -----------------------------------------------------<br />
C<br />
=<br />
3<br />
– + ------<br />
=<br />
1<br />
23 <strong>of</strong> 60<br />
© D. Johns, K. Martin, 1997<br />
(23)<br />
(24)<br />
24 <strong>of</strong> 60<br />
© D. Johns, K. Martin, 1997