diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Digital Source (http://www.diyaudio.com/forums/digital-source/)
-   -   digital design summary overview (http://www.diyaudio.com/forums/digital-source/57776-digital-design-summary-overview.html)

lt cdr data 23rd May 2005 10:58 AM

digital design summary overview
 
ok I am fairly new to this so I thought I would offer a brief guide, if I have missed anything, please add to it.

dacs:

burr brown
analog devices
crystal
dcs ring dac
npc
philips
wolfson



which is best? BB?


dig filter
FIR a la wadia/pioneer
or
IIR which is the usual.

I-V options

resistor
transformer : both 'passive'

inverting opamp I-V or
discrete stage

LPF
bessel function, any others?
usually 3rd order

I suspect apart from the dac and filter choice, this is the area that determines the sound as its most tweakable am I correct?

unity gain buffer
opamp or discrete

anyone care to elaborate on the points?

rfbrw 23rd May 2005 01:21 PM

Re: digital design summary overview
 
Quote:

Originally posted by lt cdr data


dig filter
FIR a la wadia/pioneer
or
IIR which is the usual.



What is the basis for this statement? It seems wrong.

Guido Tent 23rd May 2005 01:21 PM

Re: digital design summary overview
 
Quote:

Originally posted by lt cdr data

anyone care to elaborate on the points?


If I may add some themes

- jitter
- (PCB)layout
- power supply (noise, output impedance, bandwidth)

Personally I am OK with PCM1704 with active IV

cheers

rfbrw 23rd May 2005 01:49 PM

Re: Re: digital design summary overview
 
Quote:

Originally posted by Guido Tent


Personally I am OK with PCM1704 with active IV

cheers


Why the departure from the passive i/v in your PCM63 dac and would the active i/v be opamp or discrete ?

Guido Tent 23rd May 2005 02:18 PM

Re: Re: Re: digital design summary overview
 
Quote:

Originally posted by rfbrw



Why the departure from the passive i/v in your PCM63 dac and would the active i/v be opamp or discrete ?

10 years difference.....

regards

Guido Tent 23rd May 2005 05:39 PM

Re: Re: Re: digital design summary overview
 
Quote:

Originally posted by rfbrw


would the active i/v be opamp or discrete ?

Opamps: I can live with AD797 or OPA627 (assumed the power supplies are OK

Discrete: Yes, tubes and transistors are still OK


All times are GMT. The time now is 11:22 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2