11 define // 'over down 10'
24 define qqq '{C prime} sub'
32 define sunc '{ sin x } / x'
33 define vddm1V 'vv DD - 1 ^ roman V'
34 define vssp1V 'vv SS + 1 ^ roman V'
37 The following slide shows the complete schematics of the
38 fully-differential RIC. The operation includes a
39 correlated-double-sampling phase that occurs once every 256
40 clock periods, also called the
41 .i "spreading ratio" .
42 This reset phase is controlled by clocks $ DP sub 1 $ and $ DP
43 sub 2 $ in which the integrator is initialized by totally
44 removing the charge from $ cc F $ and storing the low-frequency
45 noise of the op amp in $ cc C $. At the same time the comparison
74 The faster clocks are $ PN $, $ ITS $ and $ SP $. The sampling
75 capacitor $ cc S $ performs the delayed subtraction of a sample
76 of the input signal $ +- ^ vv SIG $ and a choice of $ - ^ vv REF
77 $, $ AGND $ or $ + ^ vv REF $ according to the operations
78 performed by the logic partially depicted operating on past
79 results of the comparisons. The synchronous comparators are
80 reset at this fast rates, thus performing one comparison for
81 every fast clock cycle. The dynamic common-mode feedback
82 arrangement operates synchronously with the reset time slot and
83 its configuration is equivalent to that in the differential