TDA4882 datasheet(13/28 Pages) PHILIPS

13 / 28 page

1997 Sep 04

Philips Semiconductors

Product speciﬁcation

Advanced monitor video controller for OSD

TDA4882

Fig.4 Signal processing.

handbook, full pagewidth

MHA817

video portion

black level equal to

artificial black level

+ VBE

by input clamping (approximately 3 V)

input clamping pulse

at pin 10

internal signal

behind input stage

input signals

sync clipping to

artificial black level

horizontal blanking and

output clamping pulse

at pin 9

horizontal flyback and output clamping

black level equal to artificial

black level by input clamping and

storage by coupling capacitor

video signal

inserted artificial black level

output signals

(pins 19, 16 and 13)

signal at CRT cathode

at nominal gain and

contrast setting

and

maximum/nominal/

minimum brightness setting

at nominal gain and

maximum brightness setting

and

maximum/nominal/

minimum contrast setting

at nominal gain and

contrast setting

and

maximum brightness setting

at nominal contrast and

maximum brightness setting

and

maximum/nominal/

minimum gain setting

black level

ground

ultra black level

reference black level

(raster) cut-off level

grey scale

reference black level

∆ black level for

maximum brightness

∆ black level

due to brightness setting

high tension supply

voltage (e.g. 90 V)

nom.

max.

min.

nom.

max.

min.

nom.

max.

min.

brightness is set to nominal value during horizontal blanking

input signal at

pins 2, 5 and 8

with sync (on green)

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