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video splitter

Discussion in 'Electronic Design' started by Joe G \(Home\), Apr 30, 2005.

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  1. Hi All,

    I have 1 composite video source and I would like to split in to 2 inputs

    Can you recommend some video splitter ccts like emitter followers (buffers)
    or some video buffer splitter chips.

    Regards
    Joseph
     
  2. Analog devices sells something that can do that for $2:
    http://www.analog.com/en/prod/0,,759_775_AD8074,00.html
     
  3. Mac

    Mac Guest

    Use courier or other constant-width font for this ASCII-art schematic:


    |\
    | \ 75
    in-------+--------+---|+ \_________/\/\/\----out1
    | | |- / |
    | | | / |
    | | |/ |
    | | |
    | +--+/\/\/\---+
    | | R
    | \
    | /
    | \ R
    | /
    | |
    | GND
    |
    | |\
    | | \ 75
    +--------+---|+ \_________/\/\/\----out2
    | | |- / |
    \ | | / |
    / 75 | |/ |
    \ | |
    / +--+/\/\/\---+
    | | R
    GND \
    /
    \ R
    /
    |
    GND

    The op-amp could be, for example, the LT1364CN8, which is in-stock at
    digikey. Numerous details are not shown. You will need to have bypass
    capacitors, and a +/-5 V power supply. I don't know that this is the best
    or cheapest way to do this. This op-amp is just the first one I found at
    digikey that looked like it would do the job.

    Read the datasheet for the full details.

    http://www.linear-tech.com/pc/downloadDocument.do?navId=H0,C1,C1154,C1009,C1022,P1106,D2342

    Or just go to www.linear-tech.com and search for lt1364 if the above URL
    doesn't work for you.

    Have fun.

    --Mac
     

  4. .... which is seriously in error. The feedback is positive and the
    inverting input of each op-amp is not connected to anything.
     
  5. Mac

    Mac Guest

    Which, as John Woodgate pointed out elsewhere, is seriously in error. I've
    fixed the one below.


    |\
    | \ 75
    in-------+------------|+ \_________/\/\/\----out1
    | +---|- / |
    | | | / |
    | | |/ |
    | | |
    | +--+/\/\/\---+
    | | R
    | \
    | /
    | \ R
    | /
    | |
    | GND
    |
    | |\
    | | \ 75
    +------------|+ \_________/\/\/\----out2
    | +---|- / |
    \ | | / |
    / 75 | |/ |
    \ | |
    / +--+/\/\/\---+
    | | R
    GND \
    /
    \ R
    /
    |
    GND

    My apologies (especially to the OP) for posting such a fundamentally
    flawed schematic.

    --Mac
     
  6. Mac

    Mac Guest

    Thanks. I fixed it (I hope!) elsewhere in the thread.

    --Mac
     
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