U2860B-B
Dual-Channel FM Sound Demodulator for TV Systems
Description
The U2860B is a dual-channel FM sound demodulator
realized with TEMIC’s advanced bipolar process. All TV
FM standards, from 4.5 up to 6.5 MHz (standard M, B/G,
I, D/K) can be processed with high performance. The
circuit is alignment-free and has a minimum number of
external components. With 5 V supply voltage, the
U2860B is suitable for TV, VCR and multimedia
applications.
Features
D
Two
alignment-free
PLL FM demodulators,
automatic lock in on the received sound carrier
frequency
D
Mute function for both sound channels
D
5 V supply voltage, low power consumption
D
Few external components
Package:
DIP14, SO14
D
Mono and dual channel application
D
Sound IF inputs provided for ceramic filters
D
Automatic mute for 2nd sound channel (squelch)
V
S
C
stab
13
12
Supply
11
8
7
V
AF1
V
in1
1
VCO 1
Loop
filter 1
Mute
3
Mute
VCO
offset
10
VCO offset
R
ref
(optional)
V
in2
14
VCO 1
Loop
filter 2
6
V
AF2
Squelch 4
Squelch
Squelch (second carrier)
94 8139 e
9
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A1, 17-Jun-96
1 (11)
Preliminary Information
TEMIC [ TEMIC SEMICONDUCTORS ]
