|
100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC
V7 \, Y9 D: f9 r+ a1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC5 N1 d1 }6 g- }: Y# n
10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system)! U" W G" t A) D& o
10GBase-T receiver: ENOB 9.5bit (實作10bit) 833Msps ADC (833 system, 目前這個贏面較高)
8 d n% D' J+ y4 Z8 M6 R( C/ n7 B) o. F) g, p, g% w
100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC
3 c2 a* V( ?1 u0 ?- {9 V2 K1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC
( `0 F% P0 }+ B6 R. v: `0 R2 R10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)6 r% ]' W9 H$ c7 S
10GBase-T transmitter: [PAM-10] 10 level 3.14Vpp 833Msps DAC (833 system, 目前這個贏面較高)- k5 n; H' R7 a0 r
( V: \$ U4 p& z5 U6 @換言之, 有辦法搞出 ~GHz 的10bit AD 及 DA 才有10GBase-T 的入場券,
5 C4 |# ` J+ K* J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, k U1 |2 `4 p* |7 G2 q" S6 f! Q
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,
! M9 o& e, E% N0 _0 C/ l9 \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. |
|