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Old 27th December 2004, 11:19 AM   #21
Bricolo is offline Bricolo  France
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Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease
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Old 27th December 2004, 11:55 AM   #22
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Talking RE-clock for the TDA1541a non-oversampling DAC.

Dear hjelm,

I agreed your point, So my circuit I decided use better grade Motorola TL431CP to less the unmatch problem, BTW. This is test print only. Any advise for them??

thx for help!

pls advise


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Old 28th December 2004, 10:46 AM   #23
hjelm is offline hjelm  Sweden
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Now i get it.
Ok so you are generating two new clocks including a new bitclock, which admittedly seems to ok provided the 74hc4040 performs good enough.
I see some problems if i am comparing to the other reclock circuit.

On the other reclock circuit the pins from the CS are inverted and sent to the 1541 whilst you are sending the same signal. I haven't checked what they do, is this intentional?

Definitely add a resistor in series with all clock signals, guido tent has an excellent paper on why, Tent document . Possibly a ferrite or inductor in the feed to the circuits as well, before the cap.

Where is the 0.1u cap?
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Old 29th December 2004, 03:25 PM   #24
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dear hjelm,

is this the answer that U need?

I've add 10ohm resistor on the 1541A board, so not
need to add on the reclock board.

the 0u1 is SMD resistor at the back of PCB.

sorry for my bad english. Hope U will understand it.


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