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
* T; W# o! A9 n3 Vtransconductance amplier for A/D converters

+ T6 i) R/ [7 f$ J, p6 ~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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Abstract_Two designs of a fully dierential
5 C6 b; c) u4 K% p$ s- Z6 H$ atransconductance amplier to be used in a rst stage
of a pipelined 13-Bit A/D converter are developed
and presented. A three stage amplier achieves the
lowest power design. The dynamic range specication
% z! c6 M" e) R7 Z$ mis met according to the expression for noise power
  \4 W2 ^, M( G( v8 Sindicated in the design specication sheet. In this
) F, Z4 x# t, d" Q) Ireport, anyway, we show that such expression is in-
: ~6 ?9 p9 F" A: bcorrect for a Miller compensated topology. A sec-
0 z6 F9 T  ~" [/ vond design is developed to meet the specications ac-
cording to a more accurate expression of the noise
power. Much higher power consumption is obtained
even from an optimized design. Miller compensation
2 ]. {! E0 U; I6 u3 {% {( w  ^techniques are inferred to be inadequate to address
low-noise low-power specications.