SAA7144 NXP Semiconductors, SAA7144 Datasheet - Page 11

• Manufacturer Part Number: SAA7144
• Manufacturer: NXP Semiconductors

Specifications of SAA7144

• Package Type: LQFP
• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
9397 750 14454
Product data sheet
Fig 7. Gain flow chart.
STOP
X = system variable;
VBLK = vertical blanking pulse; HSY = horizontal sync pulse; AGV = actual gain value;
FGV = frozen gain value.
1/F
0
1
NO ACTION
Rev. 01 — 21 April 2005
248
4
Y
=
1
0
AGV FGV
1/L
ANTI-ALIAS FILTER
1
0
ANALOG INPUT
AMPLIFIER
X = 0
–
GAIN ACCUMULATOR (18 BITS)
VBLK
ADC
1/LLC2
254
1
1
GUDL
0
1
HOLDG
ACTUAL GAIN VALUE 9-BIT (AGV) [ 6/ 6 dB]
8
AGV
gain
1
1
; GUDL = gain update level (adjustable);
1
1/LLC2
LUMA/CHROMA DECODER
Quadruple video input processor
0
X
X
0
1
1
GAIN VALUE 9-BIT
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
UPDATE
DAC
1/LLC2
0
X = 1
0
HSY
HSY
SAA7144HL
1
1
0
0
254
Y
9
0
0
FGV
/ 0
001aab307
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