|
|
PDF TDA9176 Data sheet ( Hoja de datos )
| Número de pieza | TDA9176 | |
| Descripción | Luminance Transient Improvement LTI IC | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TDA9176 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
INTEGRATED CIRCUITS
DATA SHEET
TDA9176
Luminance Transient Improvement
(LTI) IC
Preliminary specification
Supersedes data of 1995 Jun 13
File under Integrated Circuits, IC02
1996 Jan 30
1 page  
Philips Semiconductors
Luminance Transient Improvement (LTI) IC
Preliminary specification
TDA9176
FUNCTIONAL DESCRIPTION
The TDA9176 is a Luminance Transient Improvement
(LTI) IC which is suitable for operation in both
50 and 100 Hz environments. The IC also contains
chrominance delay lines to compensate for the luminance
delay. A diagram of the LTI processor is illustrated in Fig.3.
The LTI processor contains a delay line which drives a
minimum/maximum (MINMAX) detector and a control
circuit. When the control circuit discovers a transient, the
LTI shaper switches from the minimum to the maximum
signal (or vice-versa, depending on the sign of the
transient). By mixing the original signal with the switched
signal, a variable transient improvement is obtained.
The 50% crossing point of the transient is not affected by
the LTI circuit.
If the rise time improvement is active, the duty cycle of the
output signal can be varied with the line width control input.
This function delays the rising edge and advances the
falling edge (or vice-versa). This can be used for example
aperture correction. Figures 4 and 5 illustrate some
waveforms of the LTI processor.
For correct operation the LTI circuit requires a number of
fast clamps. To overcome problems where noise is
superimposed on the input signal the device contains an
input clamp that can either clamp to the black level of the
input signal, or, insert a black level. When a black level is
inserted, the internal clamps do not respond to the noise
on the input signal (see Fig.1). When the input signal
already has an inserted black level (e.g. when it is driven
from the TDA9170 picture booster) it is recommended to
set the device to the clamping mode. If no inserted black
level is available on the input signal it is recommended to
select the black insert mode of the input clamp.
The chrominance delay lines compensate for the delay of
the luminance signal in the LTI circuit. This is to safeguard
a correct colour fit.
Two and three level sandcastles can be used as a timing
signal, only the clamp pulse of the sandcastle input is used
in the device.
There are three selection inputs to select the modes of
operation. These selections are as follows:
1. 1FH or 2FH, for the 50 or 100 Hz applications.
2. Amplitude selection, for optimum operation of the
circuit with 450 mV (p-p) or 1 Vbl-wh luminance signals.
3. Black insertion or clamping of the luminance signal.
The selection inputs must be directly connected to either
ground or the supply rail. The modes are selected as
follows:
Frequency selection: GND = 1FH mode,
VCC = 2FH mode
Amplitude selection: GND = 450 mV (p-p),
VCC = 1 Vbl-wh mode
Black insertion/clamp: GND = clamp mode,
VCC = black insert mode.
If the selection pins are left floating, internal 1 MΩ resistors
connected to the pins set the device to, 1FH mode, black
insert mode and 1 Vbl-wh mode.
handbook, full pagewidth
TDA9176
LTI
CONTROL
RT LW
32
LTI 13
SHAPER
YOUT
4
YIN DELAY
CLAMPS
MINMAX
1996 Jan 30
Fig.3 Block diagram of the LTI circuit.
5
MBE777
5 Page 
Philips Semiconductors
Luminance Transient Improvement (LTI) IC
TEST AND APPLICATION INFORMATION
Preliminary specification
TDA9176
handbook, full pagewidth
8V
100
nF
0V
YOUT UOUT VOUT
100 100 100
nF nF nF
100 µF
100
3.0 nF
kΩ
16 15 14 13
12 11 10
9
TDA9176
1234 5678
MBE778
100 100 100
nF nF nF
YIN UIN VIN
SC
Fig.6 Application diagram for 50 Hz application with 1 Vbl-wh input signal and luminance clamping.
1996 Jan 30
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TDA9176.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TDA9170 | YUV picture improvement processor based on histogram modification | NXP Semiconductors |
| TDA9171 | YUV picture improvement processor based on histogram modification and blue stretch | NXP Semiconductors |
| TDA9176 | Luminance Transient Improvement LTI IC | NXP Semiconductors |
| TDA9177 | YUV transient improvement processor | NXP Semiconductors |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |