HA12181FP PDF даташит
Спецификация HA12181FP изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «AM Radio Noise Reduction System». |
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Детали детали
Номер произв | HA12181FP |
Описание | AM Radio Noise Reduction System |
Производители | Hitachi Semiconductor |
логотип |
21 Pages
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HA12181FP
AM Radio Noise Reduction System
ADE-207-171A (Z)
2nd. Edition
June 1997
Functions
• Buffer amp. for audio
• Linear approximate circuit for noise reduction
• IF Amp., detector, audio amp. and AGC circuit for noise detection
• Gate pulse generator
Features
• High noise cancelling capacity: 46 dB typ.
• Less gain loss: GV = –0.5 dB typ.
• Low total harmonic destortion and high signal-to noise ratio: THD = 0.06% typ., S/N = 75 dB typ.
• Operation supply voltage range: 7.0 V to 10 V (8.2 V typ.)
• Less external parts count
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HA12181FP
Block Diagram
Rev.2, Jun. 1997, page 2 of 21
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HA12181FP
Table of Pin Description and External Parts
External parts
Influence of External
parts
No.
of
pin Name
DC
voltage
(V) (No
Function input)
Equivalent circuit
Larger Smaller
than
than
recom- recom- recom-
mended mended mended
No. value value value
1 IF AGC Time 2.7
R500 100 K Longer Longer
constant
for IF
AGC.
C502 3.3 µ
1
R500
100k
C502
3.3µ
+
time to
stabilize
AGC.
distortion
of recover.
2 Bias1 Bypass 3.2
for
voltage
Stabi.
3 AF Input of 3.3
input AF.
2
C500
0.033µ
20k
C500 0.033 µ —
Increased
noise.
C513 1 µ
—
—
4 Bias2 Decide 1.3
the
current of
filter
network.
5 Phase Phase 3.3
circuit
AF IN
3
+
C513
4
5
C512
0.068µ
R506
C512
12 K
Cut off Cut off
frequency frequency
of L·P·F of L·P·F
and H·P·F and H·P·F
shifted shifted
lower. higher.
0.068 µ Must be used on the
recommended value.
Rev.2, Jun. 1997, page 3 of 21
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Номер в каталоге | Описание | Производители |
HA12181FP | AM Radio Noise Reduction System | Hitachi Semiconductor |
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