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TDA4671 Datasheet

Picture Signal Improvement PSI

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INTEGRATED CIRCUITS
DATA SHEET
TDA4671
Picture Signal Improvement (PSI)
circuit
Product specification
Supersedes data of June 1993
File under Integrated Circuits, IC02
1996 Dec 11


NXP Semiconductors Electronic Components Datasheet

TDA4671 Datasheet

Picture Signal Improvement PSI

No Preview Available !

Philips Semiconductors
Picture Signal Improvement (PSI) circuit
Product specification
TDA4671
FEATURES
Luminance signal delay from 20 to 1100 ns (minimum
step 45 ns)
Luminance signal peaking with symmetrical overshoots
selectable
Selectable 2.6 or 5 MHz peaking centre frequency and
degree of peaking (3, 0, +3 and +6 dB)
Selectable noise reduction by coring
Handles negative as well as positive colour-difference
signals
Selectable Colour Transient Improvement (CTI) to
decrease the colour-difference signal transient times to
those of the high frequency luminance signals
Selectable 5 or 12 V sandcastle input voltage
All controls selected via the I2C-bus
Timing pulse generation for clamping and delay time
control synchronized by sandcastle pulse
Automatic luminance signal delay correction using a
control loop
Luminance and colour-difference input signal clamping
with coupling capacitor
4.5 to 8.8 V supply voltage range
Minimum of external components.
GENERAL DESCRIPTION
The TDA4671 delays the luminance signal and improves
colour-difference signal transients. The luminance signal
can also be improved by peaking and noise reduction
(coring).
QUICK REFERENCE DATA
SYMBOL
VP
IP(tot)
td(Y)
Vi(VBS)(p-p)
Vi(CD)(p-p)
GY
GCD
Tamb
PARAMETER
MIN.
supply voltage (pins 1 and 5)
4.5
total supply current
31
Y signal delay time
20
composite Y input signal (peak-to-peak value,
pin 16)
colour-difference input signal
(peak-to-peak value)
±(R Y) on pin 3
±(R Y) on pin 7
gain of Y channel
gain of colour-difference channel
operating ambient temperature
0
TYP.
5
41
450
1.05
1.33
1
0
MAX.
8.8
52
1 130
640
1.48
1.88
70
UNIT
V
mA
ns
mV
V
V
dB
dB
°C
ORDERING INFORMATION
TYPE
NUMBER
TDA4671
NAME
DIP18
PACKAGE
DESCRIPTION
plastic dual in-line package; 18 leads (300 mil)
VERSION
SOT102-1
1996 Dec 11
2


Part Number TDA4671
Description Picture Signal Improvement PSI
Maker NXP
PDF Download

TDA4671 Datasheet PDF






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