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參數(shù)資料
| 型號： | 15923 |
| 英文描述： | FDDI on Copper with AMD PHY Components The Effect of Local Buffer? 118KB (PDF) |
| 中文描述： | 與AMD的物理層組件的本地緩沖作用，銅FDDI的？ 118KB（PDF格式） |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 118K |
| 代理商： | 15923 |
FDDI on Copper with AMD PHY Components
4
R3
68
R4
68
R1
270
R2
270
T1
FTP 4.0
T1
FTP 4.0
R1
75
R2
75
C1
150 p
C2
150 p
R3
68
R4
68
R1
270
R2
270
T1
FTP 4.0
T1
FTP 4.0
R1
75
R2
75
C1
150 p
C2
150 p
TRANSMIT
RECEIVE
M-PORT
S-PORT
+5 V
Optocoupler
Vmin
Vmax
Window Comparator
15923A-004A
Figure 4. The Simple Option for Cable Continuity Detection
Lay-Out
During the time we have been experimenting with the
copper interface, it has become apparent that one major
source of problems is the computer noise coupled into
the transmitted and received signals. Little serial induc-
tors were added to the serial lines that come from the
PDT or ENDEC (TX, TY), and go to the PDR or EDS
(RX, RY), to filter high frequency components that do
not belong to the FDDI signal.
The protoypes we have built for preliminary testing were
based on FASTcards (ENDEC and EDS). The whole in-
terface circuit, including data path, bias resistors and
Link Detect, was plugged into the ODL footprint. The
newer generation of FASTcards based on PDT/Rs will
use exactly the same interface. Detailed schematics of
an S-port and an M-port are shown in Figures 5 and 6
respectively.
Since FCC compliance is dependent on both the circuit
characteristics and the system lay-out and configura-
tion, test results will vary from implementation to imple-
mentation. However, the circuit includes noise sup-
pressing elements to minimize EMI.
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| 1592-3 | 功能描述:電路板硬件 - PCB .113 Split fork Turret terminal RoHS:否 制造商:Harwin 類型:Shield Clip 長度:9.4 mm 螺紋大小: 外徑: 材料:Beryllium Copper 電鍍:Tin |
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