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參數(shù)資料
| 型號： | 935056440623 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 放大器 |
| 英文描述： | RF/MICROWAVE WIDE BAND LOW POWER AMPLIFIER |
| 封裝： | SOT109-1, MS-012AC, SO-16 |
| 文件頁數(shù)： | 19/21頁 |
| 文件大?。?/td> | 243K |
| 代理商： | 935056440623 |
Philips Semiconductors
Product specification
SA5219
Wideband variable gain amplifier
1997 Nov 07
7
This circuit will exhibit approximate-
ly an 8dB noise figure and 25dB gain.
50
50
50
+5V
+1V
4:1 TURNS RATIO
LC TUNED
TRANSFORMER
SOURCE
OUTPUT
5219
VAGC
SR00280
Figure 8. Narrowband Gain Optimization
The noise figure of this configuration
will be approximately 15dB.
50
50
50
+5V
+1V
SOURCE
OUTPUT
5219
50
VAGC
SR00281
Figure 9. Simple Amplifier Configuration
With the 50
source left untermi-
nated, the noise figure is 9dB.
50
50
50
+5V
+1V
SOURCE
OUTPUT
5219
VAGC
SR00282
Figure 10. Unterminated Configuration
50
50
50
+5V
SOURCE
OUTPUT
5219
Gain = 19dB + 20log10 VAGC
and is in units of Volts, for VAGC ≤ 1V
where VAGC =
R
2
R
1 ) R2
V
BG
VBG
VAGC
R1
R2
SR00283
Figure 11. User-Programmable Fixed Gain Block
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