參數(shù)資料
型號(hào): SA5209N
廠商: NXP SEMICONDUCTORS
元件分類(lèi): 衰減器
英文描述: Wideband variable gain amplifier
中文描述: 0 MHz - 850 MHz RF/MICROWAVE WIDE BAND LOW POWER AMPLIFIER
文件頁(yè)數(shù): 8/17頁(yè)
文件大?。?/td> 202K
代理商: SA5209N
Philips Semiconductors
Product specification
SA5209
Wideband variable gain amplifier
1997 Nov 07
8
50
50
50
+5V
SOURCE
OUTPUT
5209
Gain = 19dB + 20log
10
V
AGC
and is in units of Volts, for V
AGC
1V
where V
AGC
=
R
2
R
1
R
2
V
BG
V
BG
V
AGC
R
1
R
2
SR00247
Figure 11. User-Programmable Fixed Gain Block
All harmonic distortion products will be
at least -50dBc over the audio spectrum.
50
50
+5V
SOURCE
OUTPUT
5209
+5V
RF50
FULL CARRIER
AM (DSB)
MODULATING
SIGNAL
.5V
R
9R
V
AGC
SR00248
Figure 12. AM Modulator
The high input impedance to the NE5209 makes matching
to crystal filters relatively easy. The total delta gain of this
system will approach 80dB. IF frequencies well into the UHF
region can be configured with this type of architecture.
50
5209
CRYSTAL
FILTER
GAIN CONTROL
SIGNAL
50
OUTPUT
5209
5209
V
AGC
V
AGC
V
AGC
SR00249
Figure 13. Receiver AGC IF Gain
R
L
5209
R
L
±
±
V
S
R
S
R
T
R
T
V
AGC
V
CC
(+5V, unless otherwise noted)
SR00250
Figure 14. Test Set-up 1 (Used for all Graphs)
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