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Old 6th August 2006, 09:39 AM   #1
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Default 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
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Old 6th August 2006, 08:29 PM   #2
juma is offline juma  Germany
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Here it is:
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File Type: jpg lm3886 - balanced.jpg (88.3 KB, 445 views)
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Old 7th August 2006, 05:57 AM   #3
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hi Juma,
thanks a lot, it looks good for what i need.
best regards
williams
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Old 7th August 2006, 07:35 AM   #4
AndrewT is online now AndrewT  Scotland
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Hi Juma,
can you confirm C5 value?
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Old 7th August 2006, 07:39 AM   #5
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hi,
i think c5 is optional nu=not used?
best regards
williams
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Old 7th August 2006, 08:14 PM   #6
juma is offline juma  Germany
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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.
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Old 9th August 2006, 04:40 PM   #7
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If there's a jumper over C1, C2, C11, and C12, then what the heck is the point?! Lol
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Old 9th August 2006, 07:05 PM   #8
AndrewT is online now AndrewT  Scotland
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Hi,
DC coupled amp.
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