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
/ @. q  }! @! Mtransconductance amplier for A/D converters
6 f/ L( X$ r1 a: e# M+ g$ f! ]
5 }+ X  S, P% y0 I& Q+ J3 z, C- T5 HBerkeley大學的,有電路圖W/L值,模擬圖,手算公式很詳盡
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Abstract_Two designs of a fully dierential
transconductance amplier to be used in a rst stage
. D: b, T5 T% A2 \of a pipelined 13-Bit A/D converter are developed
4 `; r4 W  d  m: N) k- Zand presented. A three stage amplier achieves the
lowest power design. The dynamic range specication
( V9 Y' w! ?+ wis met according to the expression for noise power
4 @- t+ F. n, @, F# J+ P0 G( Dindicated in the design specication sheet. In this
report, anyway, we show that such expression is in-
4 a( X( m* m  M) B$ Kcorrect for a Miller compensated topology. A sec-
9 [! \( C7 q) m  s) U5 P/ ]5 [3 iond design is developed to meet the specications ac-
1 a( G) ^9 g3 @. Y, Vcording to a more accurate expression of the noise
( h+ q! r+ J) j5 M1 Qpower. Much higher power consumption is obtained
3 k, I# E* d3 t. E6 b! ]$ c$ Geven from an optimized design. Miller compensation
. \% p! w2 O$ xtechniques are inferred to be inadequate to address
low-noise low-power specications.