Sony "staggered" twin TDA1541 - Page 3

PlasticIsGood · 28th December 2012, 09:14 PM

Simple inverse:

Shinja · 28th December 2012, 11:39 PM

PlasticIsGood,
look closely the timing chart ,
in the DATA L row of I2S 8fs mode , it is annotated L1 R1 L3 above the chart.
and DATA R have R0 L2 R2 annotation.
it means the DATA L contains odd number of samples of 8fs signal and DATA R contains even.

one DAC of CDP-507ESD feeds the DATAL and WS/APT (and BCK),
the DAC outputs L1 and R1 at the next BCK from negative edge of WS/APT.
another DAC feeds DATAR and LE/\WS, then outputs L2 and R2 at the next BCK from negative edge of LE/\WS.
this is just the mechanism you presumed.

PlasticIsGood · 29th December 2012, 04:07 PM

Thanks, Shinja! I felt there should be an elegant solution.

I've never needed to understand a timing chart before, but in this case there's one pair of opposites too many for my head to grasp without an illustration.

nat8808 · 1st January 2013, 07:08 PM

This idea went into Cambridge Audio's CD2, CD3 players and DAC3 (the original 80s one) didn't it but at x16 OS with 4 x 1541A chips? Or was it a different arrangment?

Have an advert somewhere that describes the arrangement in simplistic terms.

Stan Curtis says he spent time matching 1541As so that they were a closer match to each other than Philips provided with the S1s (probably custom matched Rs were too expensive to outsiders too ).

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28th December 2012, 11:39 PM	#22
Shinja diyAudio Member Join Date: Jul 2008	PlasticIsGood, look closely the timing chart , in the DATA L row of I2S 8fs mode , it is annotated L1 R1 L3 above the chart. and DATA R have R0 L2 R2 annotation. it means the DATA L contains odd number of samples of 8fs signal and DATA R contains even. one DAC of CDP-507ESD feeds the DATAL and WS/APT (and BCK), the DAC outputs L1 and R1 at the next BCK from negative edge of WS/APT. another DAC feeds DATAR and LE/\WS, then outputs L2 and R2 at the next BCK from negative edge of LE/\WS. this is just the mechanism you presumed.

29th December 2012, 04:07 PM	#23
PlasticIsGood diyAudio Member Join Date: Mar 2012 Location: Bradford	Thanks, Shinja! I felt there should be an elegant solution. I've never needed to understand a timing chart before, but in this case there's one pair of opposites too many for my head to grasp without an illustration.

1st January 2013, 07:08 PM	#24
nat8808 diyAudio Member Join Date: Aug 2010	This idea went into Cambridge Audio's CD2, CD3 players and DAC3 (the original 80s one) didn't it but at x16 OS with 4 x 1541A chips? Or was it a different arrangment? Have an advert somewhere that describes the arrangement in simplistic terms. Stan Curtis says he spent time matching 1541As so that they were a closer match to each other than Philips provided with the S1s (probably custom matched Rs were too expensive to outsiders too ).