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Code Editor : grnexmpl.me

.nr pp 12
.nr tp 12
.nr sp 12
.nr fi 0
.ls 1
.po 1i
.pl 11i
.EQ
gsize 12
delim $$
define // 'over down 10'
define sw 'phi sub'
define aa 'A sub'
define vv 'V sub'
define mm 'M sub'
define nn 'N sub'
define cc 'C sub'
define ll 'L sub'
define rr 'R sub'
define ss 'S sub'
define gg 'g sub'
define ff 'F sub'
define qq 'Q sub'
define qqq '{C prime} sub'
define pp 'P sub'
define tt 'T sub'
define zz 'Z sub'
define kk 'K sub'
define ii 'I sub'
define iis 'IC sub'
define e2 '2 sup'
define sunc '{ sin x } / x'
define vddm1V 'vv DD - 1 ^ roman V'
define vssp1V 'vv SS + 1 ^ roman V'
.EN
.pp
The following slide shows the complete schematics of the
fully-differential RIC. The operation includes a
correlated-double-sampling phase that occurs once every 256
clock periods, also called the
.i "spreading ratio" .
This reset phase is controlled by clocks $ DP sub 1 $ and $ DP
sub 2 $ in which the integrator is initialized by totally
removing the charge from $ cc F $ and storing the low-frequency
noise of the op amp in $ cc C $. At the same time the comparison
thresholds are set.
.fl
.po -0.2i
.sp 2
.lp
.(b
.EQ
gsize -4
.EN
.GS
roman 1
italics 2
bold 3
special 4
narrow 1
medium 3
thick 5
width 5.5
l mg
file grnexmpl.g
.GE
.EQ
gsize +4
.EN
.)b
.fl
.po +0.2i
.pp
The faster clocks are $ PN $, $ ITS $ and $ SP $. The sampling
capacitor $ cc S $ performs the delayed subtraction of a sample
of the input signal $ +- ^ vv SIG $ and a choice of $ - ^ vv REF
$, $ AGND $ or $ + ^ vv REF $ according to the operations
performed by the logic partially depicted operating on past
results of the comparisons. The synchronous comparators are
reset at this fast rates, thus performing one comparison for
every fast clock cycle. The dynamic common-mode feedback
arrangement operates synchronously with the reset time slot and
its configuration is equivalent to that in the differential
feedback path.

${this.title}

Code Editor : grnexmpl.me