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Old 13th March 2018, 03:11 PM   #1371
generg is offline generg  Germany
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Oh, I see a giant with three heads.....

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Old 13th March 2018, 03:15 PM   #1372
Ian Macmillan is offline Ian Macmillan
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Quote:
Originally Posted by Zen Mod View Post
yup , we are thinking about same resistor and we agree that , if we want ( and must) to have feedback , there it is

if one want to remove it for testing purpose , all you need is to short it , what else ?
Ah, shorting rather than removing - now I understand Apologies.

Agree that shorting means that we must either operate the amplifier with no global feedback at all or 100%. Probably neither is particularly desirable.
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Old 13th March 2018, 04:43 PM   #1373
Nelson Pass is offline Nelson Pass  United States
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does that make me member of ABFAB ?
Founding member.

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Old 13th March 2018, 04:48 PM   #1374
vitalstates is offline vitalstates  United Kingdom
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A couple of naive questions if I may as I'm trying to fiddle with this in spice on 24v rails. I've tried to use the fairchild fets on the front end but can't get the bias voltage high enough, and I cant find the spice models for the toshiba fets.

Has anybody got the toshiba models they are willing to share?.

Are these spice models closely guarded, I ask because I posted a request a while back for any details on the hockey puck models but go no response.

I'm trying with 24v because I have a number of 24v 5a smps supplies which I'd like to try. I was going to try them with an F6 because I had trouble with wandering bias a few years back. My mains wanders between 242 and 254v and I thought the smps might be a solution. I'm also in the middle of a project to try them with a latfet mofo...they've got to be used
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Old 13th March 2018, 04:48 PM   #1375
generg is offline generg  Germany
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must I be a Pumpkin to be accepted?

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Last edited by generg; 13th March 2018 at 04:51 PM.
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Old 13th March 2018, 04:50 PM   #1376
generg is offline generg  Germany
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in this .txt might be some things you can use.....

not only Toshiba.
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File Type: txt Toshiba2.txt (6.1 KB, 20 views)
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Old 13th March 2018, 05:01 PM   #1377
generg is offline generg  Germany
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Remove .txt after .lib.

these models are public you can find them on the IXYS site.
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File Type: txt IXTK40P50P.lib.txt (1.4 KB, 13 views)
File Type: txt ixfk44n80q3.lib.txt (1.8 KB, 13 views)
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Old 13th March 2018, 05:24 PM   #1378
vitalstates is offline vitalstates  United Kingdom
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much obliged, thanks

My youngest frequently calls me a banana, does that count?
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Old 13th March 2018, 05:29 PM   #1379
Zen Mod is offline Zen Mod  Serbia
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nope

ZM being biggest banana , regarding LTSpice
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Old 13th March 2018, 05:34 PM   #1380
generg is offline generg  Germany
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:-))
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File Type: txt IXFK44N80Q3.asy.txt (664 Bytes, 14 views)
File Type: txt IXTN40P50P.asy.txt (662 Bytes, 12 views)
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