Distributor/buffer for 4 headphone amps ???

ksor · 19th April 2012, 05:02 PM

I have 4 headphone amps and need a distributor/buffer as an input module.

The source signal is a BALANCED LINE output - one for L and one for R (stereo)

I have found this Figur 4 page 6:

http://www.ti.com/lit/ds/symlink/ina105.pdf

But I need no gain and wonder if this princip schematic could be implemented with ordinairy op.amps. - the special is these "internal" resistors - maybe it's overkilled.

How can this be inplemented ?

sgrossklass · 25th April 2012, 01:38 PM

What you need is basically a balanced line receiver like this. You can also use the fancier instrumentation amp circuit, preferably with 0.1% resistors where it counts.

ksor · 26th April 2012, 07:46 AM

Quote:

Originally Posted by sgrossklass

What you need is basically a balanced line receiver like this. You can also use the fancier instrumentation amp circuit, preferably with 0.1% resistors where it counts.

Thx for your reply - it look interesting !

19th April 2012, 05:02 PM	#1
ksor diyAudio Member Join Date: Apr 2012	Distributor/buffer for 4 headphone amps ??? I have 4 headphone amps and need a distributor/buffer as an input module. The source signal is a BALANCED LINE output - one for L and one for R (stereo) I have found this Figur 4 page 6: http://www.ti.com/lit/ds/symlink/ina105.pdf But I need no gain and wonder if this princip schematic could be implemented with ordinairy op.amps. - the special is these "internal" resistors - maybe it's overkilled. How can this be inplemented ?

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25th April 2012, 01:38 PM	#2
sgrossklass diyAudio Member Join Date: Nov 2004 Location: Germany	What you need is basically a balanced line receiver like this. You can also use the fancier instrumentation amp circuit, preferably with 0.1% resistors where it counts.