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(ADV7181D)Can you give me some advice about this issue?

Question asked by donadona999s on Aug 18, 2016
Latest reply on Aug 18, 2016 by GuenterL

Hi !

 

I have a question about ADV7181D.

Our customer change the Video-buffer to discrete to reduce the system cost.

Please see the circuit I attached.

 

 

After they change the Video-buffer to discrete, and input white-black repeat image(per 1sec) 

the output look like flashing.

=> Please see the video I attached.

      The left side display is the ADV7181D output.

 

Our customer want to know why this happen when they change the circuit.

Can you give me some advice about this?

I think , maybe the current bias is to low when they use discrete.

If you can give us some advise, it will help us and our customer very much.

 

Best regards,

Kawa

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