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100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC+ W8 k+ \0 i4 m7 E
1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC6 X2 g0 P4 W% V6 Z( {
10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system)+ ~! V9 V G% h9 \* k% E" v* g
10GBase-T receiver: ENOB 9.5bit (實作10bit) 833Msps ADC (833 system, 目前這個贏面較高)9 n* X9 h/ j' z( w" z+ a
" P7 D9 a/ [# L. s O! Z* i0 r( X/ E8 M100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC7 v; u' u0 G6 x$ N
1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC. |, _) o$ k6 v
10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)* r( l0 a; L8 v- ?7 E
10GBase-T transmitter: [PAM-10] 10 level 3.14Vpp 833Msps DAC (833 system, 目前這個贏面較高)- F7 i/ X6 o0 i' o0 O" G! N2 B9 e
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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,/ Z2 Q: K, [* m
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 x! z' ]- H1 Y1 U
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,
: a. d2 x% k" F8 U w4 H- A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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