In Reply to: "...the source Z is truly awful..." posted by Lew on August 21, 2012 at 14:00:02:
What I mean is that designs using this concept generally do not maintain a low output Z over frequency. The problem appears due to both L/C resonance(s) and insufficient output capacitance. The latter appeared to be a particularly acute problem in the versions I SPICE'd, and practical designs with a reasonable number of filter sections are prone to generally high levels of ripple. I posted SPICE analysis here, including graphs, on at least two occasions in the past. Each was the result of a "Low DCR" power supply that was represented to this forum as being wonderfully innovative and sonically pleasing. Both designs were functionally deficient and unsuited for most purposes relating to audio power amplifiers.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: "...the source Z is truly awful..." - Triode_Kingdom 20:19:05 08/21/12 (49)
- Thanks, TK and Tre' - Lew 07:41:22 08/22/12 (48)
- RE: Thanks, TK and Tre' - drlowmu 12:12:56 08/22/12 (47)
- RE: Thanks, TK and Tre' - Ray Moth 19:03:05 08/23/12 (2)
- FOR WHAT, MISLEADING YOU AGAIN !!! - drlowmu 19:25:30 08/23/12 (1)
- RE: FOR WHAT, MISLEADING YOU AGAIN !!! - Ray Moth 16:32:35 08/24/12 (0)
- Alice in Wonderland - Triode_Kingdom 19:55:15 08/22/12 (19)
- RE: Alice in Wonderland - drlowmu 21:22:05 08/22/12 (18)
- Ya know Alice... - wheezer 06:30:03 08/23/12 (17)
- RE: Ya know Alice... - drlowmu 07:46:03 08/23/12 (16)
- How about some o'scope pics at C1 or L1 and so forth - wheezer 08:21:41 08/23/12 (15)
- Sure - drlowmu 18:59:21 08/23/12 (0)
- Not o'scope pics but... - Tre' 09:00:48 08/23/12 (13)
- RE: Not o'scope pics but... - wheezer 17:01:47 08/23/12 (0)
- Good job! - mikeyb 09:50:31 08/23/12 (11)
- RE: Good job! - Tre' 10:05:03 08/23/12 (10)
- Thanks! - mikeyb 10:14:36 08/23/12 (9)
- RE: Thanks! - drlowmu 18:52:49 08/23/12 (8)
- Hardly ... - mikeyb 05:45:51 08/24/12 (1)
- RE: Hardly ... - drlowmu 15:37:32 08/24/12 (0)
- RE: Are you going to debunk Ohm's Law?? - Ray Moth 19:14:50 08/23/12 (5)
- RE: Are you going to debunk Ohm's Law?? - drlowmu 19:39:21 08/23/12 (4)
- RE: Are you going to debunk Ohm's Law?? - Ray Moth 20:26:08 08/24/12 (3)
- RE: Are you going to debunk Ohm's Law?? - drlowmu 22:51:31 08/25/12 (2)
- RE: Are you going to debunk Ohm's Law?? - Ray Moth 02:56:45 08/26/12 (1)
- RE: Are you going to debunk Ohm's Law?? - drlowmu 07:57:01 08/26/12 (0)
- RE: Thanks, TK and Tre' - Lew 13:00:39 08/22/12 (23)
- RE: Thanks, TK and Tre' - drlowmu 19:48:14 08/22/12 (3)
- RE: Thanks, TK and Tre' - Triode_Kingdom 20:03:59 08/22/12 (2)
- RE: Jeff's Unfiltered Power Supplies - mach1 21:25:15 08/22/12 (1)
- JUPS It is!! (nt) - Triode_Kingdom 05:59:21 08/23/12 (0)
- RE: Thanks, TK and Tre' - Tre' 16:29:42 08/22/12 (18)
- Input and driver stage supply, not output supply - Lew 07:35:45 08/23/12 (10)
- Broskie - Tre' 13:46:02 08/23/12 (6)
- RE: Broskie - Lew 14:08:05 08/23/12 (5)
- RE: Broskie - wheezer 08:02:29 08/24/12 (0)
- RE: Broskie - Tre' 14:42:40 08/23/12 (3)
- RE: Broskie - Lew 18:39:32 08/23/12 (0)
- OR....... - Tre' 14:55:15 08/23/12 (1)
- Yep... - Lew 22:04:14 08/23/12 (0)
- RE: Input and driver stage supply, not output supply - Tre' 07:52:17 08/23/12 (2)
- RE: Input and driver stage supply, not output supply - Lew 08:03:48 08/23/12 (1)
- RE: Input and driver stage supply, not output supply - drlowmu 20:43:33 08/23/12 (0)
- RE: Thanks, TK and Tre' - tube wrangler 20:15:32 08/22/12 (6)
- RE: Thanks, TK and Tre' - Banat 07:31:05 08/23/12 (5)
- RE: Thanks, TK and Tre' - tube wrangler 11:58:49 08/23/12 (4)
- RE: Thanks, TK and Tre' - Banat 13:00:47 08/23/12 (3)
- RE: Thanks, TK and Tre' - tube wrangler 22:44:45 08/23/12 (2)
- RE: Thanks, TK and Tre' - Banat 06:10:19 08/24/12 (1)
- RE: Thanks, TK and Tre' - tube wrangler 08:19:38 08/24/12 (0)