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Composite sync - separate out horizontal and vertical sync?

I need to separate out the vertical and horizontal sync signals from a composite sync output, what's the easiest way to do this? I assume that there is a simple circuit which would do the job?

Thanks

Reply to
jamma-plusser
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Its called a sync separator.

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Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
Reply to
Michael A. Terrell

Perhaps..

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Reply to
CWatters

Thanks, but doesn't the LM1881 just separate the sync signal from the video in a composite feed? What I need to do is split off the horizontal and vertical syncs from a signal that is composite sync only.

Reply to
jamma-plusser

The LM1881 should do the job for you. Unless I'm seriously mistaken, the chip doesn't need video, in fact, the first thing the LM1881 does is to strip off the video to create a composite sync signal. From there, the vertical and horizontal syncs are generated and sent to separate outputs. You should be OK to use this chip.

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Dave M
MasonDG44 at comcast dot net  (Just substitute the appropriate characters in the 
address)

"In theory, there isn't any difference between theory and practice.  In 
practice, there is."  - Yogi Berra
Reply to
DaveM

You are thinking of a sync stripper.

CWatters suggested a 20 year old sync separator IC from National Semiconductor.

Available in small quantities at

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in surface mount (standard), or DIP (both standard and ROHS).

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----------------------------------------------- IC, LM1881M, 8-SOIC Jameco#: 245542 RoHS: No MFG: NATIONAL SEMICONDUCTOR MFG#: LM1881M PRICE: $2.34

----------------------------------------------- IC,LM1881N Jameco#: 107140 RoHS: No MFG: NATIONAL SEMICONDUCTOR MFG#: LM1881N PRICE: $2.85

----------------------------------------------- IC,LM1881N/NOPB Jameco#: 107141 RoHS: Yes MFG: NATIONAL SEMICONDUCTOR MFG#: LM1881N/NOPB PRICE: $5.55

-----------------------------------------------

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
Reply to
Michael A. Terrell

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