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100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC( M! W+ D/ S1 M7 y7 @) A Z
1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC
' @. I* Y6 O0 d5 u10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system)
& p# `; N! j8 u( M, I10GBase-T receiver: ENOB 9.5bit (實作10bit) 833Msps ADC (833 system, 目前這個贏面較高)
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100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC
4 r. U* x% j. u5 X0 W1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC; O& c+ R5 x- {' }* m
10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)2 }3 g, t+ o8 S7 {
10GBase-T transmitter: [PAM-10] 10 level 3.14Vpp 833Msps DAC (833 system, 目前這個贏面較高)! i1 ?2 ]# M) n/ D" c
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換言之, 有辦法搞出 ~GHz 的10bit AD 及 DA 才有10GBase-T 的入場券,- N& z8 w, n7 K0 q6 g; Z$ K
一下從125MHz 跳到 ~GHz... 真是令人n條斜線都跑出來了, 我看國內有; K7 d/ v0 b, r1 n
near GHz AD/DA 的大概只有MTK DVD-RW set的RF front end, 不過那也是6bit左右matching的東東,
6 i6 x1 Q2 ^& L3 z0 u9 M3 |- ^這規格要求的是9.5bit matching at 833MHz, 真的搞出來就改行做GHz示波器/AWG算了, 毛利還比較高哩. |
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