ne5209d NXP Semiconductors, ne5209d Datasheet - Page 8
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ne5209d
Manufacturer Part Number
ne5209d
Description
Wideband Variable Gain Amplifier
Manufacturer
NXP Semiconductors
Datasheet
1.NE5209D.pdf
(15 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
NE5209D
Manufacturer:
PHILIPS/飞利浦
Quantity:
20 000
Philips Semiconductors
1990 Aug 20
Wideband variable gain amplifier
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.
CRYSTAL
FILTER
SOURCE
50
RF INPUT
SOURCE
5209
50
V
S
V
AGC
Figure 11. User-Programmable Fixed Gain Block
Figure 14. Test Set-up 1 (Used for all Graphs)
R
S
Figure 13. Receiver AGC IF Gain
R
Figure 12. AM Modulator
T
R
T
R
5209
8
V
.5V
V
BG
+5V
AGC
+5V
5209
5209
5209
V
V
CC
AGC
R
V
1
AGC
(+5V, unless otherwise noted)
V
AGC
9R
R
2
50
MODULATING
SIGNAL
+5V
R
50
L
OUTPUT
OUTPUT
50
50
FULL CARRIER
AM (DSB)
5209
All harmonic distortion products will be
at least -50dBc over the audio spectrum.
V
AGC
R
L
and is in units of Volts, for V
where V
Gain = 19dB + 20log
GAIN CONTROL
SIGNAL
AGC
NE/SA5209
=
50
Product specification
R
1
R
OUTPUT
) R
50
2
10
AGC
V
SR00248
SR00249
SR00250
2
AGC
SR00247
V
1V
BG