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U4935B-ADP Datasheet

  • U4935B-ADP

  • SECAM Decoder

  • 16頁

  • TEMIC

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U4935B
SECAM Decoder
Description
The U4935B is an SECAM decoder designed for use with
the PAL/NTSC TV baseband processor U4930B and the
baseband delay line U3665M.
The circuit includes a bell filter, a demodulator and an
identification circuit. A signal with stable reference fre-
quency for calibration and a three-level sandcastle pulse
for blanking and burst gating are required.
The IC is realized in a bipolar VLSI technology and
operates with +8 V supply voltage. Easy interfacing and
few external components support the design of a
multistandard TV.
Features
D
Fully integrated and auto-tuned filters
D
Minimum number of external components
D
Easy interfacing with the TV baseband processor and
the switched capacitor baseband delay line
Package
16-pin dual in-line plastic (DIP16)
Block Diagram
V
S
= 8 V
0.1
m
F
Bell filter
out
2
CVBS 16
in
Bell
filter
ref 7
PLL
auto2
12
PLL
auto1
13
0.1
m
F
3
Bandgap
AMP
PLL
B 鈥揧
output
SECAM
sw.
R 鈥揧
output
10 鈥?(B鈥揧)
out
9 鈥?(R鈥揧)
out
4 Band
gap
22
m
F
ACC
Bell
filter
Bell-filter
tuning
Ident
De鈥?/div>
emphasis
Interface
PLL
tuning
5
Killer
out
0.47
m
F
8
PLL
ref
Pulse
gen.
15
SCP
in
6
GND
14
Black
adj. R
11
Black
adj. B
96 11715
1
f
ref
/
ident
Figure 1. Block diagram
Ordering Information
Extended Type Number
U4935B-ADP
Package
DIP16
Remarks
TELEFUNKEN Semiconductors
Rev. A1, 28-Jan-97
1 (16)
Preliminary Information

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