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100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC
: U, e: l8 O% a* L8 ]8 \' j$ V7 ~- z5 t1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC, P0 @' `: p$ E8 \7 Y
10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system)* }2 X& m* {6 o% x C& r6 }
10GBase-T receiver: ENOB 9.5bit (實作10bit) 833Msps ADC (833 system, 目前這個贏面較高)
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100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC
7 [$ {5 t$ T# P0 h2 {1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC
; A6 ~; w1 x$ X# v/ m, Z, J10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)
' y; a! |! r4 K/ _ f& n! ?4 i2 M10GBase-T transmitter: [PAM-10] 10 level 3.14Vpp 833Msps DAC (833 system, 目前這個贏面較高) {: p' y0 o8 `4 O% J
+ J( j3 c: t+ \換言之, 有辦法搞出 ~GHz 的10bit AD 及 DA 才有10GBase-T 的入場券,$ b1 a$ v* D- J7 _& ?4 M$ P) 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1 T, P) X& ]% m8 F+ I+ N3 D# f ]
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,% a0 j! {' c+ m8 ^, T3 }
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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