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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
Switched-Capacitor Data Converters
149
is the maximum allowable value of the sampling-time uncertainty if the output needs
to maintain a 9-bit ENOB?
Solution: Based on Equation (5.24), we can obtain the following:
σ
π
ap_max
.=
⋅⋅ ×
1
2 250 10
124
10 6
ps (5.25)
From Equation (5.20) we obtain the equivalent SNR for a 9-bit ENOB:
SNR =×+=602 9 176 5594...dB (5.26)
Utilizing Equation (3.69), we write the theoretical SNR limit due to aperture jitter:
SNR f
l
ll
=−
=− ×
20 2
2
20 2 250 10
2
6
lg lg
π
σ
π
σ

SNR (5.27)
Hence,
σ
l
144. ps (5.28)
The foregoing development indicates that Equation (5.24) provides a tight suffi cient
condition for maintaining ...
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Publisher Resources

ISBN: 9780750679077