Keeping components close?

Christian · 9th October 2002, 02:53 PM

I'm designing a chip-amp, based on the LM3886 chip. Im building it on breadboard, so now I'm wondering if I should try to pack the components as close together as possible?

Will this reduce noise? And also, I don't think I need the 3-4extra components for the mute function, so should I just leave them out? And if you know of any other modification I'd be moste happy!

Beast Regards,
Christian V

trwh · 9th October 2002, 03:07 PM

Hi Christian,

Packing the components close together can help with stability - I certainly wouldn't make any of the more critcial traces (feedback loop, etc.) longer than is absolutely necessary. Note that if you omit the components associated with the mute function, the chip will not come out of mute mode.

Check out my small PCB layout for a LM3876 based amp here:

http://headwize.powerpill.org/projec...rison2_prj.htm

Note also that Rod Elliott sells PCBs for the LM3876 (www.sound.au.com).

Hope this helps,
Tim.

pinkmouse · 10th October 2002, 09:51 AM

Hi Christian

Try this link, lots of useful info on chip amps

http://pub4.ezboard.com/ffakeidsfrm1

Christian · 10th October 2002, 05:02 PM

I did one chip board, don't know how it sounds yeat, but I really hope it won't be as noisy as my other LM3886 amp ( which was really noisy).
But as you can see, I packed things real tight.

Best Regards,
Chris V

9th October 2002, 02:53 PM	#1
Christian diyAudio Member Join Date: Jan 2002 Location: Sweden	Keeping components close? I'm designing a chip-amp, based on the LM3886 chip. Im building it on breadboard, so now I'm wondering if I should try to pack the components as close together as possible? Will this reduce noise? And also, I don't think I need the 3-4extra components for the mute function, so should I just leave them out? And if you know of any other modification I'd be moste happy! Beast Regards, Christian V

10th October 2002, 09:51 AM	#3
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Hi Christian Try this link, lots of useful info on chip amps http://pub4.ezboard.com/ffakeidsfrm1 __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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9th October 2002, 03:07 PM	#2
trwh diyAudio Member Join Date: Apr 2002 Location: UK	Hi Christian, Packing the components close together can help with stability - I certainly wouldn't make any of the more critcial traces (feedback loop, etc.) longer than is absolutely necessary. Note that if you omit the components associated with the mute function, the chip will not come out of mute mode. Check out my small PCB layout for a LM3876 based amp here: http://headwize.powerpill.org/projec...rison2_prj.htm Note also that Rod Elliott sells PCBs for the LM3876 (www.sound.au.com). Hope this helps, Tim.

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