參數(shù)資料
型號: HFBR-0400
英文描述: Low Cost, Miniature Fiber Optic Components with ST, SMA, SC and FC Ports(帶ST,SMA, SC 和 FC端口的低價格,微型光纖元件)
中文描述: 低成本,微型光纖器件與ST,形狀記憶合金,SC和FC端口(帶街,形狀記憶合金,資深大律師和財務端口的低價格,微型光纖元件)
文件頁數(shù): 21/30頁
文件大?。?/td> 389K
代理商: HFBR-0400
21
Recommended Drive
Circuits
The circuit used to supply current
to the LED transmitter can
significantly influence the optical
switching characteristics of the
LED. The optical rise/fall times
and propagation delays can be
improved by using the appro-
priate circuit techniques. The
LED drive circuit shown in
Figure 11 uses frequency com-
pensation to reduce the typical
rise/fall times of the LED and a
small pre-bias voltage to minimize
propagation delay differences
that cause pulse-width distortion.
The circuit will typically produce
rise/fall times of 3 ns, and a total
jitter including pulse-width dis-
tortion of less than 1 ns. This
circuit is recommended for appli-
cations requiring low edge jitter
or high-speed data transmission
at signal rates of up to 155 MBd.
Component values for this circuit
can be calculated for different
LED drive currents using the
equations shown below. For
additional details about LED
drive circuits, the reader is
encouraged to read Agilent
Application Bulletin 78 and
Application Note 1038.
( )
(V
CC
- V
F
) + 3.97 (V
CC
- V
F
- 1.6 V)
R
y
= –––––––––––––––––––––––––––––––
I
F ON
(A)
(5 - 1.84) + 3.97 (5 - 1.84 - 1.6)
R
y
= –––––––––––––––––––––––––––––
0.100
1 R
R
= – ––––
2
3.16 + 6.19
R
y
= ––––––––––– = 93.5
0.100
1
2
93.5
––––
R
EQ2
(
) = R
X1
- 1
R
X1
= –
= 11.8
R
X2
= R
X3
= R
X4
= 3(R
EQ2
)
R
EQ2
= 11.8 - 1 = 10.8
R
X1
(
)
C(pF) =2000(ps)
R
X2
= R
X3
= R
X4
= 3(10.8) = 32.4
11.8
Example for I
F ON
= 100 mA: V
F
can be
obtained from Figure 9
(= 1.84
V
).
C =2000 ps
相關PDF資料
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
HFBR-0400 制造商:Avago Technologies 功能描述:FIBRE OPTIC EVALUATION KIT
HFBR-0400SERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low Cost Miniature Fiber Optic Components with ST SMA SC and FC Ports(351.18 k)
HFBR-0410 功能描述:光學纖維開發(fā)工具 ST Fiber Optic Evaluation Kit RoHS:否 制造商:Omron Electronics 產(chǎn)品:Evaluation Boards 用于:SX51 封裝:
HFBR-0410 制造商:Avago Technologies 功能描述:FIBRE OPTIC EVALUATION KIT
HFBR-0410Z 功能描述:光學纖維開發(fā)工具 DC-5MBd 820nm Evaluation Kit RoHS:否 制造商:Omron Electronics 產(chǎn)品:Evaluation Boards 用于:SX51 封裝: