參數(shù)資料
型號: THS4082CDGN
廠商: Texas Instruments, Inc.
元件分類: 運動控制電子
英文描述: 175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
中文描述: 175 - MHz的低功耗高速放大器
文件頁數(shù): 13/24頁
文件大小: 384K
代理商: THS4082CDGN
THS4081, THS4082
175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
SLOS274C – DECEMBER 1999 – REVISED MAY 2000
13
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 40 shows the noise figure graph for the THS408x.
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
Source Resistance – RS (
)
f = 10 kHz
TA = 25
°
C
NOISE FIGURE
vs
SOURCE RESISTANCE
10
100
1k
10k
N
100k
Figure 40. Noise Figure vs Source Resistance
相關(guān)PDF資料
PDF描述
THS4082D 175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
THS4082DGN 175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
THS4082EVM 175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
THS4081D 175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
THS4081DGN 175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
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THS4082D 制造商:TI 制造商全稱:Texas Instruments 功能描述:175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS