diff input 3886?

Williams Audio · 6th August 2006, 09:39 AM

hi all,
I will like to build a diff input for my lm3886 amp, with out any additional active components.
A good schematic will be very much help.
bests regards
williams

juma · 6th August 2006, 08:29 PM

Here it is:

Williams Audio · 7th August 2006, 05:57 AM

hi Juma,
thanks a lot, it looks good for what i need.
best regards
williams

AndrewT · 7th August 2006, 07:35 AM

Hi Juma,
can you confirm C5 value?

Williams Audio · 7th August 2006, 07:39 AM

hi,
i think c5 is optional nu=not used?
best regards
williams

juma · 7th August 2006, 08:14 PM

Quote:

Originally posted by AndrewT
Hi Juma,
can you confirm C5 value?

C5 is a part of the input low pass filter. For C5=100pF, -3dB point is at 65 Khz. So, anything between 10 and 100 pF is OK. If you don't have problems with RF interference you can leave it out.

DJ Exprice · 9th August 2006, 04:40 PM

If there's a jumper over C1, C2, C11, and C12, then what the heck is the point?!

Lol

AndrewT · 9th August 2006, 07:05 PM

Hi,
DC coupled amp.

6th August 2006, 09:39 AM	#1
Williams Audio diyAudio Member Join Date: Apr 2004 Location: far away	diff input 3886? hi all, I will like to build a diff input for my lm3886 amp, with out any additional active components. A good schematic will be very much help. bests regards williams __________________ williams audio

7th August 2006, 05:57 AM	#3
Williams Audio diyAudio Member Join Date: Apr 2004 Location: far away	hi Juma, thanks a lot, it looks good for what i need. best regards williams __________________ williams audio

7th August 2006, 07:35 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi Juma, can you confirm C5 value? __________________ regards Andrew T.

7th August 2006, 07:39 AM	#5
Williams Audio diyAudio Member Join Date: Apr 2004 Location: far away	hi, i think c5 is optional nu=not used? best regards williams __________________ williams audio

9th August 2006, 07:05 PM	#8
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, DC coupled amp. __________________ regards Andrew T.


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9th August 2006, 04:40 PM	#7
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	If there's a jumper over C1, C2, C11, and C12, then what the heck is the point?! Lol

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