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MC1490P Folha de dados(PDF) 4 Page - LANSDALE Semiconductor Inc.

Nome de Peças MC1490P
Descrição Electrónicos  RF/IF/Audio Amplifier Wideband Amplifier With AGC
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Fabricante Electrônico  LANSDALE [LANSDALE Semiconductor Inc.]
Página de início  http://www.lansdale.com
Logo LANSDALE - LANSDALE Semiconductor Inc.

MC1490P Folha de dados(HTML) 4 Page - LANSDALE Semiconductor Inc.

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Issue A
LANSDALE Semiconductor, Inc.
ML1490
Figure 11. Noise Figure versus
Source Resistance
Figure 12. Noise Figure versus
AGC Gain Reduction
Figure 13. Harmonic Distortion versus AGC Gain
Reduction for AM Carrier (For Test Circuit, See Figure 14)
Figure 14. 10.7 MHz Amplifier Gain
55 dB, BW
100 kHz
RS, SOURCE RESISTANCE (Ω)
0
2.0
4.0
6.0
8.0
10
12
14
16
18
20
100
200
400 600
1.0 k
2.0 k
4.0 k
10 k
f = 30 MHz
f = 60 MHz
f = 105 MHz
VCC = 12 Vdc
GR, GAIN REDUCTION (dB)
0
5
10
15
20
25
30
35
40
0
–10
–20
–30
–40
–50
–60
–70
–80
f = 30 MHz
Test circuit has tuned input
providing a source resistance
optimized for best noise figure.
BW = 1.0 MHz
GR, GAIN REDUCTION (dB)
0
5.0
10
15
20
25
30
35
40
0
10
20
3040
5060
7080
f = 10.7 MHz
Modulation: 90 % AM, fm = 1.0 kHz
Load at Pin 8 = 2.0 k
EO = peak–to–peak envelope of
modulated 10.7 MHz carrier at Pin 8
760 mVpp
240 mVpp
EO = 2400 mVpp
Toroid core (–124 pF)
L1 = 24 turns, #22 AWG wire
on a T12–44 micro metal
L2 = 20 turns, #22 AWG wire
on a T12–44 micro metal
Toroid core (–100 pF)
0.002
0.002
0.002
L1
+12 Vdc
RFC
L2
36 pF
1
2
3
4
5
6
7
8
50
Ω Load
82 pF
10.7 MHz
(50
Ω Source)
VAGC
5.6 k
50–150 pF
ML1490
Legacy Applications Information


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