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| 型號： | THS4011JG |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 290-MHz LOW-DISTORTION HIGH-SPEED AMPLIFIERS |
| 中文描述： | 290 - MHz的低失真高速放大器 |
| 文件頁數(shù)： | 16/30頁 |
| 文件大小： | 439K |
| 代理商： | THS4011JG |
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THS4011, THS4012
290-MHz LOW-DISTORTION HIGH-SPEED AMPLIFIERS
SLOS216B – JUNE 1999 – FEBRUARY 2000
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
noise calculations and noise figure (continued)
This brings up another noise measurement usually preferred in RF applications, the noise figure (NF). Noise
figure is a measure of noise degradation caused by the amplifier. The value of the source resistance must be
defined and is typically 50
in RF applications.
NF
10log
e
2
ni
eRs
2
Because the dominant noise components are generally the source resistance and the internal amplifier noise
voltage, we can approximate noise figure as:
NF
10log
1
en
2
IN
RS
2
4 kTRS
Figure 26 shows the noise figure graph for the THS401x.
20
5
0
10
100
N
25
NOISE FIGURE
vs
SOURCE RESISTANCE
30
1 k
100 k
15
10
Source Resistance –
f = 10 kHz
TA = 25
°
C
10 k
Figure 26. Noise Figure vs Source Resistance
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| THS4011MFK | 制造商:TI 制造商全稱:Texas Instruments 功能描述:290-MHz LOW-DISTORTION HIGH-SPEED AMPLIFIERS |
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| THS4011MJGB | 制造商:Texas Instruments 功能描述:OP Amp Single Volt Fdbk ±16.5V/33V 8-Pin CDIP Tube 制造商:Texas Instruments 功能描述:OP AMP SGL VOLT FDBK 16.5V/33V 8CDIP - Rail/Tube |
| THS4012 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:290-MHz LOW-DISTORTION HIGH-SPEED AMPLIFIERS |
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