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參數資料
型號: THS4082CDRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
封裝: GREEN, PLASTIC, SOIC-8
文件頁數: 5/32頁
文件大小: 841K
代理商: THS4082CDRG4
THS4081, THS4082
175MHz LOW POWER HIGHSPEED AMPLIFIERS
SLOS274D DECEMBER 1999 REVISED JUNE 2001
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
e
Rs
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 )
e
n
2
) IN )
R
S
2
4kTR
S
Figure 40 shows the noise figure graph for the THS408x.
0
5
10
15
20
25
30
35
40
Source Resistance RS ()
f = 10 kHz
TA = 25°C
NOISE FIGURE
vs
SOURCE RESISTANCE
10
100
1k
10k
Noise
Figure
(dB)
100k
Figure 40. Noise Figure vs Source Resistance
相關PDF資料
PDF描述
THS4082IDG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4082IDRG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4082CDG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4082IDGNG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4081IDRG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
相關代理商/技術參數
參數描述
THS4082D 制造商:TI 制造商全稱:Texas Instruments 功能描述:175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
THS4082DGN 制造商:TI 制造商全稱:Texas Instruments 功能描述:175-MHz LOW-POWER HIGH-SPEED AMPLIFIERS
THS4082EVM 功能描述:放大器 IC 開發工具 THS4082 175MHz Lo-Po Hi-Spd Amp Eval Bd RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V
THS4082ID 功能描述:高速運算放大器 Dual 175MHz RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
THS4082IDG4 功能描述:高速運算放大器 175-MHz Low-Power Vltg-Feedback Dual RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
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