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In Reply to: RE: At best Cheever defines the euphonic, not the accurate posted by morricab on March 30, 2014 at 14:19:36:
"You are making the same faulty assumption as many engineers that if you push the distortion low enough, regardless of HOW, it should be "perfect". BUT there is no zero distortion with non-linear devices, ever. That means you have to make sure that the distortion is shaped in the way that it is least audible...to HUMANS."
I am, as usual, very much enjoying your thoughts on amplifiers but I would like to comment on your statement above. While I think that I know where you are 'coming from', none the less it is simply, logically, not true. I also believe that you are making several assumptions that you may not be conscious of because those awful engineers are actually right.
First-off "perfect" doesn't exist other than in the sense of meeting Specs. Except for the identity case (I'm THE perfect example of myself) we are stuck with limiting variations sufficiently that stuff will "do the job". In this case the job is to have inaudible distortions.
With adequate loop bandwidth and gain the in-band distortion will asymptotically approach the error amplifier's which can be very clean.
The best solution to a problem is a function of the system constraints and there are always trade-off's as with everything else in life. So while your approach may be best for a particular ilk of designs it certainly isn't a given...
Regards, Rick
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Follow Ups
- RE: At best Cheever defines the euphonic, not the accurate - rick_m 07:57:27 03/31/14 (38)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 15:34:24 03/31/14 (37)
- RE: At best Cheever defines the euphonic, not the accurate - RGA 21:58:29 04/02/14 (28)
- I grant Morricab that he's less pompous than you, RGA - Feanor 08:24:44 04/03/14 (1)
- If you were not an Ostrich you would not find my post pompous. NT - RGA 17:36:32 04/03/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 08:18:25 04/03/14 (25)
- RE: At best Cheever defines the euphonic, not the accurate - RGA 18:13:45 04/03/14 (2)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 12:52:44 04/04/14 (1)
- RE: At best Cheever defines the euphonic, not the accurate - RGA 00:53:14 04/05/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - Disbeliever 09:12:25 04/03/14 (21)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 04:09:23 04/04/14 (2)
- RE: At best Cheever defines the euphonic, not the accurate - Disbeliever 04:31:57 04/04/14 (1)
- RE:"only Class AB does it for me" - rick_m 13:29:23 04/04/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - RGA 18:28:31 04/03/14 (15)
- Class A to B switching nonsense - Feanor 08:47:40 04/04/14 (10)
- RE: Class A to B switching nonsense - RGA 01:16:01 04/05/14 (0)
- RE: Class A to B switching nonsense - morricab 12:44:06 04/04/14 (8)
- Let's remember the purpose of class A - Feanor 13:36:57 04/04/14 (7)
- RE: Let's remember the purpose of class A - morricab 04:07:52 04/05/14 (5)
- RE: Let's remember the purpose of class A - rick_m 10:23:09 04/05/14 (1)
- RE: Let's remember the purpose of class A - morricab 12:19:22 04/05/14 (0)
- RE: Let's remember the purpose of class A - Disbeliever 06:35:49 04/05/14 (2)
- RE: Let's remember the purpose of class A - morricab 12:37:50 04/05/14 (1)
- RE: Let's remember the purpose of class A - Disbeliever 00:08:53 04/07/14 (0)
- RE: Let's remember the purpose of class A - RGA 01:21:24 04/05/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - Braxus 18:49:24 04/03/14 (3)
- RE: At best Cheever defines the euphonic, not the accurate - RGA 08:30:35 04/04/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 04:13:31 04/04/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - Disbeliever 03:58:40 04/04/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - rick_m 10:11:22 04/03/14 (1)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 05:15:42 04/04/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - rick_m 21:32:46 03/31/14 (7)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 02:05:04 04/01/14 (3)
- RE: At best Cheever defines the euphonic, not the accurate - rick_m 07:16:33 04/01/14 (2)
- RE: At best Cheever defines the euphonic, not the accurate - morricab 10:33:04 04/01/14 (1)
- RE: At best Cheever defines the euphonic, not the accurate - rick_m 11:00:29 04/01/14 (0)
- RE: At best Cheever defines the euphonic, not the accurate - Braxus 21:53:24 03/31/14 (2)
- RE: At best Cheever defines the euphonic, not the accurate - rick_m 06:35:32 04/01/14 (0)
- There are many reasons they will carry the brand - morricab 02:06:55 04/01/14 (0)