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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
153
A 2-bit thermometer-coded current-steering DAC is shown in Figure 5.2(b). In
general, this type of DAC architecture employs 2
M
equal current sources for trans-
forming an M-bit binary input to avoid overloading. As shown, a 2-bit input binary
code is decoded into the equivalent 4-bit thermometer code, with each bit directing
the output of a current source, either to the op-amp or to ground. And the currents
sent to the inverting terminal of the op-amp are superposed and converted into an
analog voltage by the feedback resistor R
0
.
In general, the conversion accuracy of a current-steering DAC greatly depen
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Publisher Resources

ISBN: 9780750679077