saa7114 NXP Semiconductors, saa7114 Datasheet - Page 17

• Manufacturer Part Number: saa7114
• Description: Pal/ntsc/secam Video Decoder With Adaptive Pal/ntsc Combfilter, Vbi-data Slicer And High Performance Scaler
• Manufacturer: NXP Semiconductors

Philips Semiconductors
SAA7114_3
Product data sheet
Fig 8. Gain flow chart
X = system variable.
Y = AGV
GUDL = gain update level (adjustable).
VBLK = vertical blanking pulse.
HSY = horizontal sync pulse.
AGV = actual gain value.
FGV = frozen gain value.
STOP
NO ACTION
FGV > GUDL.
0
Rev. 03 — 17 January 2006
1/F
1
4
496
0
1
ANTI-ALIAS FILTER
0
1/L
ANALOG INPUT
1
510
AMPLIFIER
GAIN ACCUMULATOR (18 BITS)
VBLK
X = 0
ADC
1/LLC2
1
1
ACTUAL GAIN VALUE 9-BIT (AGV) [ 3/ 6 dB ]
AGV
HOLDG
1
0
1
1
9
1
X
gain
0
1
GAIN VALUE 9-BIT
1/LLC2
X
0
PAL/NTSC/SECAM video decoder
1
0
UPDATE
HSY
LUMA/CHROMA DECODER
0
HSY
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
1
1/LLC2
X = 1
DAC
0
1
0
Y
510
0
SAA7114
FGV
mhb728
/ 0
0
9
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