ML6420CS-3 MICRO-LINEAR [Micro Linear Corporation], ML6420CS-3 Datasheet - Page 10

• Manufacturer Part Number: ML6420CS-3
• Description: Triple/Dual Phase-Equalized, Low-Pass Video Filter
• Manufacturer: MICRO-LINEAR [Micro Linear Corporation]

USING VIDEO FILTERS
ML6420
The output waveform is not symmetric. All ringing occurs
after the main pulse. Result is visual smearing and fine
ghosting to the right of every edge in the picture. See old
Figure 19a.
Phase Corrected Analog Filter
Output waveform is substantially symmetric. Ringing is
greatly reduced. Result is increase in apparent resolution.
No smearing or ghosting.
10
(CONTINUIED)
TYPICAL ANALOG FILTER
5.5MHz TYP
DIGITAL FILTER
ML6420
HALF-BAND
Figure 19b.
Figure 19a.
Figure 19c.
Analog Filtering in the Time Domain
Output waveform is symmetric. Ringing is about the same
as ML6420 alone. Difference between purely analog and
analog/digital approach is subtle and will only have a
material effect on multi-pass video processing.