TDA3566 Philips Semiconductors, TDA3566 Datasheet - Page 13

• Manufacturer Part Number: TDA3566
• Description: PAL/NTSC decoder
• Manufacturer: Philips Semiconductors

8. These signal amplitudes are determined by the ACC circuit of the reference part.
9. This value depends on the gain setting of the RGB output amplifiers and the drift of the picture tube guns. Higher
10. The variation of the black-level during brightness control in the three different channels is directly dependent on the
11. With respect to the measuring pulse.
12. This difference occurs when the source impedance of the data signals is 150
13. For correct operating of the black level stabilization loop, the leading and trailing edges of the sandcastle pulse
14. The voltage at pins 24 and 25 can be changed by connecting the load resistors (20 k
Philips Semiconductors
February 1994
PAL/NTSC decoder
black level values are possible (up to 5 V) however, in that condition the amplitude of the available output signal is
reduced.
gain of each channel. Discolouration during adjustments of contrast and brightness does not occur because
amplitude and the black-level change with brightness control are directly related.
is 4 s (sandcastle pulse). For a lower impedance the difference will be lower.
(measured between 1.5 V and 3.5 V) must be within 200 ns and 600 ns respectively.
slider bar of the hue control potentiometer (see Fig.6). When the transistor is switched on, the voltage at pins 24 and
25 is reduced below 9 V, and the circuit is switched to NTSC mode. The width of the burst gate is assumed to be
4 s typical.
13
and the black level clamp pulse width
1%, in this condition) to the
Product specification
TDA3566A