U2841B Datasheet, PDF (1/9 Pages) TEMIC Semiconductors – Monolithic Integrated Circuit

Monolithic Integrated Circuit
U2841B
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 IF input provided for operating with ceramic filters
D Minimum total harmonic distortion
D Low power consumption
D 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
47 pF
47 pF
Tuned
reference circuit
IF input
93 7519
16
4
5
6
7
Mute control 2
voltage
3
2.4 V / 3.7 V
V >7V
G=1 _S
+V_{S 15}
V_stab1
V_stab2
G=2
V_S < 6 V
1
14
13
AF output (controlled)
Volume control
Figure 1.
Deemphasis
4.7 nF
8
11 kW
SCART
9 ^{AF output}
11
SCART switch
10
AF input
12 demod. signal
SCART
AF input
TELEFUNKEN Semiconductors
1 (9)
Rev. A1, 17-Jul-96
Preliminary Information