器件名称: U2841B
功能描述: Monolithic Integrated Circuit
文件大小: 112.03KB 共9页
简 介:U2841B
Monolithic Integrated Circuit
Description
The integrated circuit, U2841B, is designed as a single FM-IF-amplifier and demodulator for TV sound processing with SCART switches and AF control in bipolar technology.
Features
D D D D
IF input provided for operating with ceramic filters Minimum total harmonic distortion Low power consumption Operates alternatively with 5 V or 12 V supply voltage
D Demodulator provided for operating with
ceramic resonator or coil
D SCART AF input / AF output D Wide volume control range D ESD protected
Block Diagram
Tuned reference circuit 47 pF 47 pF
Deemphasis
4.7 nF
93 7519
IF input
4 16
5
6
7
8 SCART 9 AF output 11 kW
Mute control voltage
2
2.4 V / 3.7 V V >7V
S
G=1 3 Vstab1 +VS G=2 15 1 Vstab2 14
10 VS < 6 V 13 Volume control 11 SCART switch AF input 12 demod. signal SCART AF input
AF output (controlled)
Figure 1.
TELEFUNKEN Semiconductors Rev. A1, 17-Jul-96
1 (9)
Preliminary Information
U2841B
Pin Description
GND 1 16 Vin, IF 15 VS 14 Vout, AF 13 V13 12 Vin, AF (SCART) 11 VSW 10 Vin, AF 9
95 11253
VMUTE 2 C3 Vout Vout Vin Vin Cde 3 4 5 6 7 8
Pin 1 2 3 4, 5 6, 7 8 9 10 11 12 13 14 15 16
Symbol GND VMUTE C3 Vout Vin Cde Vout, AF (SCART) Vin, AF VSW Vin, AF (SCART) V13 Vout, AF VS Vin, IF
Vout, AF (SCART)
Function Ground Mute control voltage Capacitor (internal reference voltage) Limiter amplifier output Reference circuit (demodulator) Deemphasis AF output (SCART) AF input (demodulated signal) SCART switch AF in……
