EL4501C - Preliminary
Video Front End
Description of Operation
The EL4501C incorporates the following functional
blocks:
also includes a qualification scheme which rejects noise
pulses and other video artifacts. The horizontal line rate
timing is controlled with the use of a resistor, RFREQ
The following outputs are available:
• Composite sync
.
• DC restore amplifier
• Advanced sync separator
• Data Slicer
• Horizontal sync
Combined they provide the key analog processing func-
tions for a number of video system applications. The
operation of each of these blocks is described below.
• Vertical sync
• Burst gate
Sync Separator
• Odd/Even field identification
• Loss of signal detected
• Sync amplitude detected
The sync separator contained in the EL4501C has been
designed to be compatible with a wide range of video
signal standards, operating with horizontal line rates
from PAL/NTSC rates up to 150kHz. The sync separator
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ELANTEC [ ELANTEC SEMICONDUCTOR ]
