3845 Просмотр технического описания (PDF) - Allegro MicroSystems
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3845 Datasheet PDF : 8 Pages
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3845
AM NOISE BLANKER
FUNCTIONAL BLOCK DIAGRAM
RF IN
RF
1
RF BYPASS 2
RF BIAS
3
RF AGC
4
GROUND
16
PEAK
DET
dV/dt DET
MIXER
OUT
17
RF GATE
HIGH
13
15
18
+4 V
RF GATE
LOW
IF
IN
VCC
SUPPLY 20
REG
19
14
7
5
NO CONNECTION
68
1 kΩ
10 AUDIO IN 1
9 AUDIO OUT 1
1 kΩ
11 AUDIO IN 2
12 AUDIO OUT 2
Dwg. FS-004-1A
NOISE
RF
TEST CIRCUIT
0.005
0.01
0.01
1
2
0.1
3
0.1
10 µF
+4
R5
5
R6
6
AUDIO OUT1
AUDIO IN 1
7 NC
C8 8
0.1
9
0.1
10
SUPPLY
DET
VCC 20
NC 19
18
17
RF BYPASS
MIXER OUT
16
R15
15
NC 14
13
0.001
0.1
12
11
0.1
AUDIO OUT2
AUDIO IN2
Dwg. ES-007-1A
Note that the noise-pulse input is attenuated 20 dB by the test circuit.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1988, 1997 Allegro MicroSystems, Inc.
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