|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Re: Opamp feedback question posted by Steve Eddy on March 15, 2003 at 22:54:23:
OK,
Thanks Steve, I just wanted to be sure.That means that the 47 Gaincard or pretty much any op amp based amplifier with closed loop gain of around 20-30 would constitute a high feedback design. The feedback loop is kept as short as possible in the gaincard circuit.
Now, the current trend in the audiophile press seems to be a dismissal of high feedback designs. By that standard, the 47 Gaincard should be ruled out by any one wanting a low or no feedback design. It seems to me that the emphasis in the press on the amount of feedback as opposed to the relative speed of the feedback circuitry is an emphasis on the wrong parameter, if the gaincard is any evidence. Feedback properly applied would have a much smaller characteristic time in the feedback loop than in the open loop, i.e. the feedback loop would be much faster than the open loop circuit. One part of doing this is to keep the feedback loop as short as possible.
Please give me some [feedback] on what I wrote. A little bit of knowledge [on my part] is a dangerous thing.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Opamp feedback question - bilbobaggins 05:51:49 03/16/03 (1)
- Re: Opamp feedback question - Steve Eddy 09:35:27 03/16/03 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
