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參數(shù)資料
| 型號： | foa3251d |
| 廠商： | SIEMENS AG |
| 英文描述： | 2.5 Gb/s Laser Driver(2.5 Gb/s激光驅(qū)動器) |
| 中文描述： | 2.5 Gb / s的激光驅(qū)動器（2.5 Gb / s的激光驅(qū)動器） |
| 文件頁數(shù)： | 10/23頁 |
| 文件大?。?/td> | 332K |
| 代理商： | FOA3251D |
FOA3251B1
S1028C1
Functional Description
Data Sheet
3-10
08.99
CONFIDENTIAL
3
Functional Description
The FOA3251consists of a clock and data recovery block (CDR), a clock multiplier unit
(CMU) and a programmable delayline.
3.1
Functional Block Diagram
Figure 3-1
Block Diagram
3.2
Functional Block Description
The clock and data recovery block (CDR) consists of a bang-bang phase detector (PD),
a frequency window detector (FWD) and a VCO. The PD also provides a kind of
statistical BER signal that is used to generate a loss of signal (LOS) signal. The FWD
moves the VCO in the right frequency range. The frequency window is about 10000 ppm
of the center frequency. When the frequency is out of range a los of lock signal (LOL) is
generated. The center frequency is given by a reference clock signal which is (signal
frequency)/128. The VCO is a 3 stage ring oscillator type.
The clock multiplier unit (CMU) consist of a phase frequency detector (PFD), a VCO and
a retiming Flip-flop. The PFD is type 4 phase and frequency detector. The low pass
filtered PFD signal as a function of the phase error is shown in figure 2-2.
CMU
CDR
DATA
Postamp
PD
FWD
VCO
LOOP
FILTER
REFCLK
Recovered
Clock
Recovered
DATA
L
L
VCO
PFD
LOOP
FILTER
D
C
TRDATA
TRCLK
DELAYLINE
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FOA-401 | 制造商:L-com Inc 功能描述:ADPTR,METAL ST-ST DUPLEX BRNZ |
| FOA-401A | 制造商:L-com Inc 功能描述:ADPTR,METAL ST-ST DUPLEX CERAM 制造商:L-com Inc 功能描述:ST FIBER OPTIC COUPLER SINGLE/MULTIMODE 制造商:L-com Inc 功能描述:ST FIBRE OPTIC COUPLER SINGLE/MULTIMODE 制造商:L-com Inc 功能描述:ST FIBER OPTIC COUPLER, SINGLE/MULTIMODE 制造商:L-com Inc 功能描述:ST FIBER OPTIC COUPLER, SINGLE/MULTIMODE; Connector Type:ST Adapter; Series:-; Fiber Type:Singlemode, Multimode; Fiber Diameter:-; Connector Body Material:Metal ;RoHS Compliant: Yes |
| FOA4100/5100 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10 Gbit/s Transceiver Functions -MUX+CMU. DEMUX+CDR |
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| FOA4400 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Semiconductor Solutions for High Speed Communi cation and Fiber Optic Applications |
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