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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Critique please: Analogue -> Digital (TOS-LINK)
Critique please: Analogue -> Digital (TOS-LINK)
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Old 2nd August 2012, 09:49 AM   #1
underwurlde is offline underwurlde  United Kingdom
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Default Critique please: Analogue -> Digital (TOS-LINK)

Circuit I've quickly knocked up below hopefully takes stereo Audio line-level analogue input and converts it to a digital S/PDIF optical TOS-LINK output, thus matching what some CD players provide such as the Marantz C63/CD67 etc.

I would greatly appreciate any comments / recommendations for my circuit below:
Click the image to open in full size.


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Old 5th August 2012, 03:58 PM   #2
gfiandy is offline gfiandy  United Kingdom
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I am not completely sure but I don't think you can use Schmitt trigger input parts for a CMOS oscillator. The oscillator requires a bit of positive feedback to build up the oscillation and the SI think Schmitt trigger will prevent this.

Toslink parts use a lot of current in big gulps a 10uF or 100uF cap after you filter inductor would be wise.

You could get a bit of a thump from the input with no resistor to ground before the input capacitors, it also helps to reduce static strike damage.

Hope it works out, I haven't checked the IC configuration.

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Old 19th August 2012, 04:54 PM   #3
underwurlde is offline underwurlde  United Kingdom
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Thank you! (Work in progress of course).


for ref only: http://www.diyaudio.com/forums/digit...c-project.html
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