Balanced line driver, PCB layout share

[digi01]

Hi guys
this is my lately DIY sweets it is a very simple design,purpose for general use.

sch:

 

[digi01]

top lay+bottom lay:

 

[digi01]

high pix PDF file,toplayer

 

[digi01]

PDF,bottomlayer+silk

 

[digi01]

any comments and suggestions are welcomed,Thank you.

regards
digi

 

[Hoffmeyer]

Hi digi01.

Interesting design.
I found some time ago some interesting designnotes at UltraCAD , on the subject "Maintaining clean power".
If You cheat a little in the addressline, You can find 9 tech-notes, many of interest

 

[digi01]

Hi digi01.

Interesting design.
I found some time ago some interesting designnotes at UltraCAD , on the subject "Maintaining clean power".
If You cheat a little in the addressline, You can find 9 tech-notes, many of interest

thank you.
yes,I think it is interesting.
You can use this part to hook up a stereo GC,make it work in bridge. or drive a balanced input power amp.

 

[troystg]

Ok so digi01-

This BLD will put out 2 signals, one inverted and one not?

So with 6 chips I could bridge 2 groups of three?

By chance have a schematic of one in practical application?

 

[digi01]

a application example:

 

[matjans]

has anyone tried a drv134 on it's own or in combination with an ina134?
how did it sound? I'm not talking aout cmrr but does it have an impact on the sound itself?

 

[digi01]

when I get the boards,it looks more sweet than my imagine.I will do some test with BrianGT's 3875nigc and 4780,myselfs 3886igc.

enjoys

digi

 

[troystg]

digi01-

When will they be available for order?

 

[digi01]

rabstg,
I am doing test now.I am interested in its drive performance and commonability.
If anyone is interested,it will be available asap

soldering,

 

[peranders]

Look good!

 

[wim]

excuse my newby question, but what exactly is a balanced line driver?? Can i see it as a pre-amp?? or is it only to connect 2 mono amps (gainclones) to 1 speaker.

Can anyone explain it to me in newbylanguage?

Thanks

 

[troystg]

Hey digi01-

Out of curiousity does the BLD have a gain > 1?
Or is it EASILY adjustable?

Either way I'm still in when they are ready...

 

[troystg]

Hey wim-

Awaiting digi01's reply to my previous post before I answer your.. If it can be operated at "higher" gain than 1 you should be able to use it as the driver stage in a pre-amp..

Pre-amp to what device? Stereo, guitar, test equipment, etc.?

 

[wim]

Thanks for your reaction.

What i mean is: were do you use a balanced line driver for? What is it? What can you do with it? does it come in place of a pre-amp, or can you use it in combination with a pre-amp and a power amp?

When i know what is is for, i want to use it for audio, for gainclones (i have build several, and they sound great).

Sorry for my silly questions.

 

[troystg]

Hi wim-

Well the purpose digi01 built it for is to build a bridged gainclone.

This circuit (using the EXCELLENT drv135 chip) is taking a NON-inverting signal and splitting it evenly to send out a balanced + and - signal to drive the inputs of matching (hopefully paralleled) Gainclones.

Therefore one gainclone amplifies the positive half of the signal, and the other Gainclone amplifies the negative half of the signal.

When the two halves are combined the amplifier develops "roughly" twice the voltage swing and power output.

If the gain of the drv135 can be raised above 1 then it could be used as the pre-amp in the front end of a controller or high gain amplifier.

 

[wim]

Thanks a lot Rabstq, thats the information i was waiting for!!

Now i know how to use this kind of stuff.