VDP3108 datasheet(14/61 Pages) MICRONAS

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VDP 3108

ADVANCE INFORMATION

MICRONAS INTERMETALL

The dynamic range can be adjusted to 0 ... +14 dB for

small high frequency signals. Adjustment is separate for

signal overshoot and for signal undershoot. For large

signals the dynamic range is limited by a nonlinear func-

tion that does not create any visible alias components.

The center frequency of the peaking filter is switchable

from 2.5 MHz to 3.2 MHz. For S-VHS and for notch filter

color decoding, the total system frequency responses

for PAL and NTSC are shown in figure 2–17.

Transients, produced by the dynamic peaking when

switching video source signals, can be suppressed via

the priority bus.

Fig. 2–16: Dynamic peaking frequency re-

sponse

MHz

–5

–10

–15

–20

MHz

–5

–10

–15

–20

MHz

–5

–10

–15

–20

CF= 3.2 MHz

CF= 2.5 MHz

S-VHS

MHz

–5

–10

–15

–20

MHz

–5

–10

–15

–20

CF= 3.2 MHz

CF= 2.5 MHz

PAL/SECAM

MHz

–5

–10

–15

–20

MHz

–5

–10

–15

–20

CF= 2.5 MHz

CF= 3.2 MHz

Fig. 2–17: Total frequency response for peaking filter and S-VHS, PAL, NTSC

NTSC

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