|
100Base-TX receiver: ENOB 5.5bit (實作6bit) 125Msps ADC
- q, N% X& r) u/ O7 I1000Base-T receiver: ENOB 7.0bit (實作8bit) 125Msps ADC
( H* c' |1 i2 T& n; R1 m6 C: l10GBase-T receiver: ENOB 9.5bit (實作10bit) 625Msps ADC (625 system)
! U) u2 S! N/ @/ p; h, }4 _0 F4 j) W$ B10GBase-T receiver: ENOB 9.5bit (實作10bit) 833Msps ADC (833 system, 目前這個贏面較高) j6 Q) }$ B' V3 p' ]2 ] m: {
9 g2 N0 R) ^) k" ~5 x
100Base-TX transmitter: [MLT-3] 3 level 1.50Vpp 125Msps DAC+ m5 H* [* \: |) g
1000Base-T transmitter: [PAM-5] 5 level 2.00Vpp 125Msps DAC
0 [8 c) e5 Z# i0 r10GBase-T transmitter: [PAM-20] 20 level 3.14Vpp 625Msps DAC (625 system)+ E2 Z2 H! O5 r2 X4 \9 ` @
10GBase-T transmitter: [PAM-10] 10 level 3.14Vpp 833Msps DAC (833 system, 目前這個贏面較高)0 c5 w2 K' ^+ k: f3 \/ ^3 o
! ?/ N$ a8 _0 K7 ~; L換言之, 有辦法搞出 ~GHz 的10bit AD 及 DA 才有10GBase-T 的入場券,
% S2 i& P! g7 f4 o: I2 |. v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: x9 t" h; z6 z% K; H0 s" b
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,
/ T2 L* v7 E) X( R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. |
|