標題: Design of a minimum power, low-voltage supply fully-di erential [打印本頁] 作者: hyseresis 時間: 2008-11-7 02:17 PM 標題: Design of a minimum power, low-voltage supply fully-di erential Design of a minimum power, low-voltage supply fully-differential& n% J3 E. ?: p, Y
transconductance ampli er for A/D converters 0 x+ n: k) D' d, u) U7 j+ W j$ Z' ?3 r0 C9 ]
Berkeley大學的,有電路圖W/L值,模擬圖,手算公式很詳盡 3 m* f; }$ g; y9 E. y$ J# q( g4 Y! s給大家參考3 ^% U0 D4 M) |/ @( _4 A1 j Abstract_Two designs of a fully di erential. q" T1 q+ c+ a+ Y# Q4 O
transconductance ampli er to be used in a rst stage 3 p1 O' w* M* A2 Q5 vof a pipelined 13-Bit A/D converter are developed* Z2 x, x; C( i* x3 ~; y
and presented. A three stage ampli er achieves the! o7 Y1 D1 z' a6 O2 r
lowest power design. The dynamic range speci cation 9 o6 k5 [+ a7 M6 q$ fis met according to the expression for noise power 4 B1 c7 E/ Z, Z( Oindicated in the design speci cation sheet. In this" _8 q: ~: ^- g6 W" @' Z$ ]
report, anyway, we show that such expression is in- 7 e0 P G4 \: g5 {8 n$ d+ C' |correct for a Miller compensated topology. A sec-! }1 D2 o3 a& C( z' y
ond design is developed to meet the speci cations ac-# F ~$ s0 x3 E1 i2 P
cording to a more accurate expression of the noise q& m- m- D1 Z( P. _" G" r7 e
power. Much higher power consumption is obtained# B6 H" H4 w: `
even from an optimized design. Miller compensation8 U7 [# i3 O, X$ R+ q
techniques are inferred to be inadequate to address" T. W0 O8 r) ?; h
low-noise low-power speci cations.