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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
Design of SC Delta-Sigma Modulators for Multistandard RF Receivers
287
the calculated minimum C
sampling
is equal to 0.044 pF when the SNR and V
ref
are set
to 70 dB and 1.25 V, respectively. And for DECT, the result is 0.17 pF (OSR = 64)
when the SNR and V
ref
are set to 90 dB and 1.25 V, respectively. Sometimes a smaller
reference voltage such as 1.0 V is used to further reduce the thermal noise.
As we can see, C
sampling
for GSM has the largest capacitance (0.6 pF), hence it
should be the bottom line. In this design, C
sampling
is chosen to be 0.72 pF to provide a
design margin. The sizes of the sampling capacitors in the second and third integra- ...
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Publisher Resources

ISBN: 9780750679077