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U3660M Datasheet

  • U3660M

  • Baseband Delay Line (64 Us)

  • 7頁

  • TEMIC

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U3660M-B
Baseband Delay Line (64
m
s)
Description
The U3660M is an integrated baseband delay line circuit. It provides a delay of 64
m
s for the color difference signals,
鹵(R-Y)
and
鹵(B-Y),
in multi-standard TVs.
Features
D
One line delay time, addition of delayed and non-
delayed output signals
D
Adjustment-free application, VCO without external
components
D
Line-locked by the sandcastle pulse
D
No crosstalk between SECAM colour carriers
(diaphoty)
D
Handles negative or positive colour-difference input
signals
D
Comb filtering functions for NTSC colour-difference
signals
D
Clamping of ac-coupled input signals
[鹵(R-Y)
and
鹵(B-Y)]
D
Correction of phase errors in the PAL system
Block Diagram
Ref
13
Bias
"
(B鈥揧) 14
"
(R鈥揧) 16
Vref
Clamping
Line memory
Shift register
Clamping
S+H
S+H
LPF
+
12
"
(B鈥揧)
"
(R鈥揧)
Line memory
Vref
+
11
LPF
3 MHz
fsc
V
DD2
GND2
1
SC detector
Control
9
V
DD1
GND1
Clock generator
PLL
3
5
10
94 8223
SSC pulse
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A2, 13-Dec-96
1 (7)

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