TDA2616, PGA2311 soundbar noise problem - diyAudio
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Old 18th January 2013, 08:22 AM   #1
child1 is offline child1  Denmark
diyAudio Member
Join Date: Jan 2013
Default TDA2616, PGA2311 soundbar noise problem

Hello everyone

Here's my little issue. I'm building an active soundbar for my television. I have build the amplifier/controller/subfilter PCB and assembled it but I'm experiencing some problems listed below.

- Loud audible hissing from the speakers. (not 50/60Hz noise, more like a snake )
- The pin changes from the TINY IR (remote receiver) do not trigger the interrupts in the attiny2313 for volume up/down/mute on the PGA2311

Have been on my school today measuring the audio trough the system. The amplification seems to be okay, and no DC is added to the signal. Im really getting frustrated because i can't seem to pinpoint the problem.

Hope some good soul will take a look at my schematic and PCB layout and hopefully say... Ahhh that is obvious...

Best regards and thanks

Mads, Denmark
P.S. please excuse my english... hope it makes sense.
Attached Files
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File Type: pdf Controller.pdf (62.9 KB, 40 views)
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Old 18th January 2013, 09:17 AM   #2
svon is offline svon  Israel
diyAudio Member
Join Date: Jul 2008
need to split digital ground and analog ground . combine them in a single point
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Old 18th January 2013, 09:30 AM   #3
child1 is offline child1  Denmark
diyAudio Member
Join Date: Jan 2013
Hi svon

thanks for the reply. I have them split and connected in one point, so i don't think that is it.
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