|
|
PDF U4270B Data sheet ( Hoja de datos )
| Número de pieza | U4270B | |
| Descripción | FM IF limiter amplifier and detector | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de U4270B (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
TELEFUNKEN Semiconductors
FM IF limiter amplifier and detector
U 4270 B
Description
The U 4270 B is an integrated bipolar FM-IF amplifier
circuit with field strength indicator, stop signal generator,
multipath detector and controllable mute function. It is
designed for car radios and home receiver applications.
Features
D 7 stage limiter amplifier
D Multipath signal detector
D Stop signal generator with controllable threshold
Block Diagram
D Signal strength output
D Controllable mute function
D High signal/noise ratio and low signal distortion
1 14 (15)
9 (10)
18(20)
(19)
17
R3 Mute depth control
10 (11)
3 (4)
4 (5)
8 (9)
(8)
7
16 (18)
11 (12) 15 (16) 13 (14) 12 (13)
5 (6)
6
(7)
2
( ) SSO 20
94 8876
Rev. A1: 07.10.1994
Preliminary Information
1
1 page  
TELEFUNKEN Semiconductors
Parameters
AFC output
Output current
Input frequency offset
Reference voltage output
Output voltage
Maximum load current
Multipath detection
Detector threshold
Output leakage current
Charge current
Discharge current
Mute function
Mute “off voltage
IF-Input signal
Limiting threshold
Test Conditions / Pin
Symbol
Pin 7
"deviation 50 kHz
IAFC = 0
Pin 8
" IAFC
" foff
I8 = 0.5 mA
V8
I8
Pin 12, 13, 15
V12 < 1 V, fV15 = 20 kHz
V12 = VS
Pin 15 connected to ground
vPin 15 open circuit
V13 1 V
Pin 2
V15
I12
I13
I13
Vout – 2 dB
Pin 8
Voff
Vout – 3 dB
Vi
Min
60
3.7
5.0
2.1
–6
0.22
25
U 4270 B
Typ Max Unit
110 140 m A
8 15 kHz
4.2 V
3 5 mA
7 mV
1.5 m A
4.0 mA
– 10 m A
0.33 V
33 dBm V
Test circuit:
Vi
Multipath input
Q0
VAF
Rev. A1: 07.10.1994
signal
voltage
Preliminary Information
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet U4270B.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| U4270B | FM IF limiter amplifier and detector | TEMIC Semiconductors |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |