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Demystifying Switched Capacitor Circuits
book

Demystifying Switched Capacitor Circuits

by Mingliang (Michael) Liu
June 2006
Intermediate to advanced content levelIntermediate to advanced
336 pages
10h 24m
English
Newnes
Content preview from Demystifying Switched Capacitor Circuits
Demystifying Switched-Capacitor Circuits
78
input stages (either in forward or feedback paths) are represented by three different
gain factors, whereas the closed-loop op-amp is represented by an integrating func-
tion. The weighted inputs and output are summed up before entering into the op-
amp. Based on the signal fl ow graph, we can develop the following equation:
VzCz C z V C
C
in out
(
)
⋅−−
(
)
[]
+⋅−
(
)
{}
⋅⋅
−−
2
1
1
1
3
0
1
11
11
1
=
(
)
z
Vz
out
(3.81)
Thus, the overall transfer function is given by
Hz
Vz
Vz
CCz C
CCCz
out
in
(
)
=
(
)
(
)
=
+
(
)
+−
12
1
1
030
1
==−
+
−+
(
)
[]
−+
(
)
[]
C
CC
CCCz
CCCz
1
03
121
1
003
1
1
1
(3.82)
It can be found that the pole Z
p
and zero Z
z
of the previous circuit a ...
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Publisher Resources

ISBN: 9780750679077