I am building myself a new CD transport based on a NOS CDpro2 drive i have been saving. I have been looking at various schematics looking for a high quality output driver/buffer/converter call it what you will. interface from the Cdpro2 unit to a rca/bnc SPDIF jack. IDEALLY I would like to have AES/EBU, RCA, Toslink and ST. But I will settle with just rca/bnc.
I see that ARC uses a AM26LS31, Wadia uses various 74 series parts like the 74HCT86D or the 74LS00 etc etc.
.
I am looking for Info on the thought process for these devices. I would imagine you need a high current FAST chip capable of driving a capacitive load into 75 ohms. I tried googling various versions of SPDIF output board. etc and did not find much that was what i was really looking for. are there any really good designs I should look at?
I see that ARC uses a AM26LS31, Wadia uses various 74 series parts like the 74HCT86D or the 74LS00 etc etc.
.
I am looking for Info on the thought process for these devices. I would imagine you need a high current FAST chip capable of driving a capacitive load into 75 ohms. I tried googling various versions of SPDIF output board. etc and did not find much that was what i was really looking for. are there any really good designs I should look at?
Attachments
There is already an SPDIF output connector on the cdpro controller board. There is a small transformer there for 75 ohm coax connection. If you are going to take the digital output from the SAA7324 pin 51 you have to keep in mind it´s running on 3.3 volt logic