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100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC3 a. x- D2 s( p+ g; f: r7 [
1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC
6 ^; l# F8 G1 A0 [. }) @10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system)+ X5 h: t: @) V5 U
10GBase-T receiver: ENOB 9.5bit (實作10bit) 833Msps ADC (833 system, 目前這個贏面較高)' s% N- W" z6 p9 r) g4 `
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100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC: B6 s. L2 A0 A/ K5 f' a) c
1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC
" U+ b. e6 |9 g: A6 { v10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)7 p7 E4 f% X8 j4 h5 P
10GBase-T transmitter: [PAM-10] 10 level 3.14Vpp 833Msps DAC (833 system, 目前這個贏面較高)
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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,
. o) b- n6 t+ j! N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$ `6 v* z. |0 a% R
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,
' v3 ?5 N5 H- s# K3 t# s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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