Tried to search for the schematics of this but failed - borbelyaudio.com seems not to be responding. If its using passive I/V then the DAC power supply becomes extremely critical. These days I don't recommend passive I/V for this reason.
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It's active I/V conversion.
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I'm not familiar with Ian's NOS. However if you're interested in an I/V schematic I posted one over here today - http://www.diyaudio.com/forums/digital-line-level/227677-using-ad844-i-v-42.html#post4983888
It doesn't have resistor values - some of them depend on the DAC you connect to it. If you need help working out how to choose the Rs for the '63 then please do ask.
It doesn't have resistor values - some of them depend on the DAC you connect to it. If you need help working out how to choose the Rs for the '63 then please do ask.
I'm not familiar with Ian's NOS. However if you're interested in an I/V schematic I posted one over here today - http://www..com/forums/digital-line-level/227677-using-ad844-i-v-42.html#post4983888
It doesn't have resistor values - some of them depend on the DAC you connect to it. If you need help working out how to choose the Rs for the '63 then please do ask.
Yes, I'm interested, could you let me know the resistors and capacitorss values for PCM63 and the voltages?
TIA
Felipe
Hi abraxalito,
Thank you for your reply. I have a vague recollection that someone (iancanada?) designed a generic board that could be used for older chips like PCM63. But, I cannot not find the thread.
Kindest regards,
M
I'm not familiar with Ian's NOS.
Thank you for your reply. I have a vague recollection that someone (iancanada?) designed a generic board that could be used for older chips like PCM63. But, I cannot not find the thread.
Kindest regards,
M
Hi abraxalito,
Thank you for your reply. I have a vague recollection that someone (iancanada?) designed a generic board that could be used for older chips like PCM63. But, I cannot not find the thread.
Kindest regards,
M
Link: http://www.diyaudio.com/forums/digital-line-level/220407-drive-nos-ad1865-62-pcm1704-02-63-tda1541-fifo-universal-i2s-pcm-driver-board.html
Thanks for your time and to share your schematic, Vout 2Vrms, still I do not have it determined.
Here's the schematic from running some simulations in LTSpice. If you'd like the simulation file I can also give you it.
Notice that because the PCM63 is bipolar output and the circuit is single-ended, we have a current source (bottom left of the picture) to provide an offset. Since the PCM63 has a -5V supply I've assumed it will be powered from that. The rest of the circuit needs around 10V supply. DC offset is not controlled so a coupling capacitor will be called for.
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Hi merlin el mago,
That is it. Thank you very much,
Kindest regards,
M
That is it. Thank you very much,
Kindest regards,
M
Thanks abraxalito for your present, today is mi birthday.
Oh cool Many Happy Returns, hope the present is useful
Hi merlin el mago,
That is it. Thank you very much,
Kindest regards,
M
Your welcome.
Oh cool Many Happy Returns, hope the present is useful
Sure, thanks again. The transistors have to be matched? If yes what Idss?
Cheers
Felipe
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