Design of a minimum power, low-voltage supply fully-di erential

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Design of a minimum power, low-voltage supply fully-differential
& k" ?7 m* u+ U: ]" ktransconductance amplier for A/D converters

( q5 k* y7 U% G9 u# z9 T3 E/ ~Berkeley大學的,有電路圖W/L值,模擬圖,手算公式很詳盡
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; b: t3 b! i* g- BAbstract_Two designs of a fully dierential
transconductance amplier to be used in a rst stage
of a pipelined 13-Bit A/D converter are developed
2 z# l1 k' ]% K! m) N3 Q% i8 ~and presented. A three stage amplier achieves the
$ |, B! R1 q6 N# o& n& @6 Glowest power design. The dynamic range specication
is met according to the expression for noise power
# U% R: u" F" T) rindicated in the design specication sheet. In this
% V' E4 B# k% a: breport, anyway, we show that such expression is in-
5 M* x" L6 O" E. Pcorrect for a Miller compensated topology. A sec-
) s5 b: K! }# z8 dond design is developed to meet the specications ac-
  j) j# V  r8 y, }5 f5 ^9 Tcording to a more accurate expression of the noise
! [" k) a( z: U- ?, @power. Much higher power consumption is obtained
" _4 i- c1 W& i# P( l3 g# E! yeven from an optimized design. Miller compensation
techniques are inferred to be inadequate to address
low-noise low-power specications.