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100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC
: W6 H) S! i( _& u4 d/ E5 r1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC( S' b, `- h) w
10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system); N& v, a3 {* s/ W I+ v
10GBase-T receiver: ENOB 9.5bit (實作10bit) 833Msps ADC (833 system, 目前這個贏面較高). F2 l' Q7 K" E* ]* X& l A
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100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC& R% p! k3 \! A; W( i
1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC
8 v5 x9 s2 w3 U& X10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)5 j+ v/ @; C4 \. P
10GBase-T transmitter: [PAM-10] 10 level 3.14Vpp 833Msps DAC (833 system, 目前這個贏面較高)! x1 y* R# L7 \( P, ^' m
C: D. O9 Z# ~8 U* g. N換言之, 有辦法搞出 ~GHz 的10bit AD 及 DA 才有10GBase-T 的入場券,
9 W$ ^' c/ |4 g/ Q# L1 b* R Y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: J7 R5 ?4 {8 r8 p& y! l% ]
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,
7 i7 [8 I$ h9 U) h: q" h" i& u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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