An interesting analog calibration technique was reported by Moon et al. [33].
The technique uses a thermometer-coded SC DAC similar to that in Figure 5.3(a) as
the demonstration platform. The basic idea is to adaptively calibrate the charge
delivered via each input branch by using a variablereference voltage for each branch
(similar to the current copying and the reference refreshing techniques reported in
[18] and [25], respectively), until all branch charges accord with a single reference
charge value, which is rectified by an accurate capacitor (i.e., the nominal C). In
effect, the deviation o
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