Laserdisc AC3 demodulator circuite wanted!

[swede]

Hi guys,

I've modified my laserdisc player, and added an AC3 output. Though my amplifier has a demodulator built in, I just cant get rid of my lust to build one myself. The problem is that I cannot find any description on the modulation, nor any DIY circuitry on the web to build one.

Does anyone have any clue on how to build a demodulator circuit, so I can connect my AC3 output directly to the digital input on just any home theater reciever?

Regards,
//magnus

 

[swede]

Does anyone have a clue?

//magnus

 

[hifi]

www.crystal.com the chips are availeble from eurodis (former ericsson) but you got to mail them for them

/micke

 

[fcel]

The one thing I can think of is to order a service manual from, let's say, Yamaha and order whatever is described on that manual and then of course you have to built your own board. The last time I looked on a Yamaha AC-3 demodulator, there is only a few components in there and the biggest component is a surface mount demodulator chip.

 

[swede]

Does anyone here have a service manual on PDF, by any chance?

//magnus

 

[swede]

Just another try

Hi again,

I still need a service manual of a Yamaha amp (which has a AC3 demodulator).

Anyone out there?

Or... I'd really like a whitepaper on AC3 modulation/demodulation on laserdiscs. There must be a standard paper out there somewhere.

Best regards,
//magnus

 

[swede]

Wow... some progress

Hi,

I found this!

http://www.soundlabsgroup.com.au/Download/BDE_RF_Demodulator_CCT.pdf

At least a schematic.
Now I'd like to know how it works.

//magnus

 

[N-Channel]

Dead Thread: ARISE!

Hi Swede,

That link is dead. Probably since it is nearly 4 yrs old! What model is your Laserdisc Player? I have an RCA LDR-600, top o' the line for its day. Had everything except the AC-3 Output. Any idea if anyone has done this player? All articles thus far are for various Pioneer players.

Cheers,

Steve