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PDF U4454B Data sheet ( Hoja de datos )
| Número de pieza | U4454B | |
| Descripción | Quasi-Split-Sound Processing and AM-Demodulator | |
| Fabricantes | TEMIC Semiconductors | |
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U4454B
Quasi-Split-Sound Processing and AM-Demodulator
Description
The U4454B quasi-split-sound processor is a bipolar
integrated circuit for all FM-TV standards and NICAM
sound systems. For FM/NICAM the IC operates as
QSS-mixer. In case of AM sound the circuit can be used
as AM demodulator.
Features
D PLL intercarrier-mixer for all FM standards
(incl. NICAM sound system)
D High grade signal processing for FM/NICAM
sound systems
D Also suitable as AM-demodulator
D Gain controlled wideband amplifier
D AGC operates as a peak- and mean-level detector
D High input sensitivity
D Wide supply voltage range (6.8 V up to 13 V)
D Low power consumption
D ESD protection
Case: 16-pin DIL plastic
Block Diagram
Loop filter
VCO Tank
12
Lock
detector
16
IF Input
1
Video
11 8
9
VCO
90°
0°
93 7653
6
Output
Interference
rejection
3
NC
2
NC
Overload
detector
5
IF AGC
+/–
4 15 10
AGC
Lock
detector
7 13
Average
Figure 1.
14 +V
S
TELEFUNKEN Semiconductors
Rev. A1, 23-Feb-96
Preliminary Information
1 (7)
1 page  
U4454B
Typical Application Circuit
+ VS
22 m H
IF
TSB 5304
16
1
32.4 MHz
TSB 5307
22 m F
10 nF
150 W
15 14 13
C2
R1
1.5 nF
C1
470 nF
12 11 10
32.4 MHz
38.9 MHz
S1
10 nF
38.9 MHz
(32.4 MHz)
9
10 kW
15 pF
U4454B
L1
12 pF
2345678
4.7 m F
1 mF
10 nF
10 kW
2.2 kW
SFE
5.74 MC
680 W
680 W
SFE
5.5 MC
AF (AM)
3.3 nF
22 nF 22 nF
4.7 m F
22 nF 22 nF
16 15 14 13 12 11 10
9
U2831B
93 7654
12345678
1k
3.3 kW 3.3 kW
1 kW
1 nF 22 nF 1 nF
15 nF 15 nF 22 m F
L2 5.74 MHz
L3 5.5 MHz
AF2 AF1 +VS = 9 V
TELEFUNKEN Semiconductors
Rev. A1, 23-Feb-96
Preliminary Information
5 (7)
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet U4454B.PDF ] | |
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