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100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC
( I* |7 a8 i& X$ L% L' ]. `3 `1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC: J$ I0 z! K- Y8 r$ t
10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system)
5 X% O+ v. w% |9 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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4 X9 {: v6 t5 z, G: V! @100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC* c7 J# e+ _$ a1 K
1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC
% ?4 Q+ |5 v! Y M/ k3 ~# i5 P/ M10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)! c; s9 V$ X" y2 _
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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7 W& V6 @, w+ j1 z0 V換言之, 有辦法搞出 ~GHz 的10bit AD 及 DA 才有10GBase-T 的入場券,
0 j; }: N* O+ D: C% c w( H' L( h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
) r/ n, y" R8 }8 |, {; Z onear 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,
% I( s7 g+ {- e; ]" J+ ^+ _6 `6 H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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