U3660M Datasheet, PDF (1/7 Pages) TEMIC Semiconductors – Baseband Delay Line (64 Us)

Baseband Delay Line (64 ms)
U3660M-B
Description
The U3660M is an integrated baseband delay line circuit. It provides a delay of 64 ms for the color difference signals,
±(R-Y) and ±(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 Handles negative or positive colour-difference input
signals
D Clamping of ac-coupled input signals [±(R-Y)
and ±(B-Y)]
D Line-locked by the sandcastle pulse
D No crosstalk between SECAM colour carriers
(diaphoty)
D Comb filtering functions for NTSC colour-difference
signals
D Correction of phase errors in the PAL system
Block Diagram
Ref
13
Bias
"(B–Y)
14 _Clamping
"(R–Y)
16 _Clamping
Vref
Line memory
Shift register
Line memory
S+H
+
LPF
S+H
+
LPF
" ₁₂ (B–Y)
" _{11 (R–Y)}
VDD2 ₁
SC detector
GND2 3
5
Vref
fsc
PLL
Control
3 MHz
9 ^VDD1
Clock generator
10 ^GND1
SSC pulse
Figure 1. Block diagram
94 8223
TELEFUNKEN Semiconductors
1 (7)
Rev. A2, 13-Dec-96