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參數(shù)資料
| 型號(hào)： | LTC1520 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual, Micropower, LinCMOS(TM) Voltage Comparator 8-PDIP -40 to 85 |
| 中文描述： | 最高50Mbps精密四線接收器 |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大?。?/td> | 214K |
| 代理商： | LTC1520 |
7
LTC1520
APPLICATIO
S I
N
FOR
ATIO
U
Alternate Uses
The tightly controlled propagation delay of the LTC1520
allows the part to serve as a fixed delay element. Figure 9
shows the LTC1520 used as a tapped delay line with 18ns
±
3ns steps. Several LTC1520s may be connected in series
to form longer delay lines. Each tap in the delay line is
accurate to within
±
17% over temperature.
As shown in Figure 10, the LTC1520 can be used to create
a temperature stable ring oscillator with period increments
W
U
of 36ns. Low skew and good channel-to-channel match-
ing enable this oscillator to achieve better than a 45/55
duty cycle (the duty cycle approaches 50/50 as more
LTC1520s are used for lower frequencies). Note that the
fixed voltage bias may either be created externally with a
resistor divider or generated internally using a bypass
capacitor and the internal open circuit bias point (approxi-
mately 3.3V). The use of the internal bias point will result
in a 1% to 2% distortion of the duty cycle.
–
+
0ns DELAY
INPUT
1/4 LTC1520
–
+
18ns DELAY
1/4 LTC1520
–
+
36ns DELAY
1/4 LTC1520
–
+
54ns DELAY
72ns DELAY
1/4 LTC1520
3.3k
5V
0.01
μ
F
3.3k
1520 F09
Figure 9. Tapped Delay Line with 18ns Steps
Figure 10. Temperature Stable Ring Oscillators
–
+
–
+
1/4 LTC1520
–
+
1/4 LTC1520
9.3MHz OSCILLATOR
WITH BETTER THAN
45/55 DUTY CYCLE
TYPICAL STABILITY
±
5% OVER TEMPERATURE
1/4 LTC1520
3.3k
5V
0.01
μ
F
3.3k
–
+
–
+
1/4 LTC1520
–
+
1/4 LTC1520
–
+
1/4 LTC1520
6.9MHz
OSCILLATOR OUTPUT
1/4 LTC1520
0.01
μ
F
1520 F10
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