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Part Name
Description
HA12181FP View Datasheet(PDF) - Hitachi -> Renesas Electronics
Part Name
Description
Manufacturer
HA12181FP
AM Radio Noise Reduction System
Hitachi -> Renesas Electronics
HA12181FP Datasheet PDF : 21 Pages
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HA12181FP
Test Circuit
IF-IN
PULSE-IN
C501
1000p
50
R505 C504
47k 0.22
µ
Det.Out
B
V
CC
(8.2V)
+
A
C503
+
0.01
µ
R502
15k
R503 C507 C509
180k 2200p 0.033
µ
C506
100
µ
16
15
14
13
12
11
10
R504
4.7k
+
C508
1
µ
9
C OUT
AM-SG
AF-IN
+
50
AF-SG
C513
1
µ
R500
100k
1
2
3
4
5
6
+
C502 C500
3.3
µ
0.033
µ
R506 C512 C511
12k 0.068
µ
0.033
µ
7
8
C510
0.033
µ
Unit R :
Ω
C:F
Note: 1. Resistors tolerance are within ±5%.
2. Capacitors tolerance (C509 to C512) are within ±5%, other capacitor are within ±10%.
Operation Principle
ANT.
A
1st IFT
16
IF
Noise
Detector
B
RF
CONV.
IF
AM-IC
DET
3
C
Processing
Waveform Circuit
9
Out
HA12181FP
D
Figure 2 System Block Diagram of AM Radio
Rev.2, Jun. 1997, page 8 of 21
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