TDA1541 info

[Bernhard]

I will do it some time but I am afraid it is the same thing as with the clock...

 

[till]

none of all you old philips DAC fanatics did try this?


#90 circuit measures swing of ~1 to ~1,6 V on my scope

is this ok or should i change before building 6 of them?

 

[till]

And it works with schemtaic shown in #90!

now for the discrete inverter for the - DAC

 

[carlosfm]

none of all you old philips DAC fanatics did try this?

Huh?
What?
Me?
My dacs have been quiet, I've been fiddling with phonostages and amps lately.

Bernhard has been fiddling with clocks.

 

[till]

this is nothing with clocks, its preconditioning the digital input lines to the chips for minimal crosstalk and influence on the output.

 

[carlosfm]

I know till, I've read this thread some months ago.
I was joking.😀
Bernhard has beed scavenging oscillators.

 

[ZERS]

And it works with schemtaic shown in #90!

now for the discrete inverter for the - DAC

Hi till,

did you built it or this is just a simulation ?

Did you built this one ?

 

[ZERS]

Oups, I forgot the attachment

 

[Bernhard]

And how does it sound compared to standard cmos/TTL levels ????😕 😕 😕

 

[till]

i did not simulate it, some people who simulated posted allready. I built it.

I don´t want to give comments on sound now, because i feel i listened and compared not enough to tell something about yet.

 

[ZERS]

OK, I guess I posted earlier the right schematics you built

 

[ash_dac]

Hi,


Has anyone read the papers on the attachment?

Did RUDY J. VAN DE PLASSCHE work on the tda1541 ?

I compared the datasheets of the tda1541a, and tda1543 to try and see what the main differences were.

From this thread:-

-5 to -15V powers oscilator, and DEM circuits. (on the tda1541a datasheet they are decoupled to each other to ground)


I'm sure I would not understand the papers but i'm sure someone out there could translate!

Then maybe DEM reclocking could be worked on http://www.diyaudio.com/forums/showthread.php?s=&threadid=11949&highlight=


Kind regards,


Ashley.

 

[ash_dac]

and this info I found


Regards,


Ashley.

 

[DragonMaster]

Anything happening here?

 

[tubee]

Has anyone build this voltage-level circuit for 1541's I2S yet????

http://www.diyaudio.com/forums/attachment.php?s=&postid=376208&stamp=1082491308

I am curious for the results.

This is a huge thread, so it would be a waste of typing-time from all contributers if no-one tried the schematic. I consider to build it, with dem-reclock.

 

[X.G.]

the output clipping diodes of TDA1541

I checked the the output clipping diodes of TDA1541,using my method showed here😉

http://www.diyaudio.com/forums/showthread.php?s=&postid=535159#post535159

I found it is .....

An externally hosted image should be here but it was not working when we last tested it.

 

[X.G.]

for comparing,I checked the output clipping diodes of AD1865 again,using the same method.the result is

An externally hosted image should be here but it was not working when we last tested it.

 

[tubee]

Very nice X.G. , your measurement-possiblitities.


But what still stands is:

Has anyone build this voltage-level circuit for 1541's I2S yet????

 

[X.G.]

hi,tubee

I didn't try the voltage-level circuit for 1541's I2S,because it is too complicated to me.

but I and my friends tried to add 3 resistors in the I2S which between CS8412 and TDA1541 for reducing the groud-bound effect,and got the much better sound.the best value of 3 resistors is 1K-3K(!) showed below,not 22-100 ohms which is ordinary in the other DAC.

An externally hosted image should be here but it was not working when we last tested it.

 

[DragonMaster]

What involves testing the circuit? Is it just building it, putting a 0v/5v switchable source at the input, a voltmeter at the output and measure the voltage?

Or you want that we build 3 of them and plug them on the 1541A?