Since it is hard to attach images on last post, I repost my question here.
The output signals of TVP5146 in my deisgn are fading away in sequence from MSB to LSB.
What is the possible reason for this?
Anything associated with analog ground or digital ground connections?
Based on our testing, all power supply are stable.
But the analog ground for analog power supply is connected to digital ground.
The signal at the front of C136 is fine but the signal after C136 get fading after few minutes.
Is there any possible, the clamping circuit inside TVP5146 sampling the wrong location?
Many thanks for your answers.
David.
