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Old 16th October 2009, 05:48 PM   #1
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Default Almost new Linear Fet

IXYS release the following device recently IXTK110N20L2
Its only available as a N channel device but it might be useful non the less
there is also much higher voltage devices available from the same family for those wanting to build a amp for electrostatic devices.

Perhaps papa could comment as to the usefulness of this device for audio
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Old 16th October 2009, 09:30 PM   #2
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I have an Ixys part in the amplifier I am presenting at BAF 09.

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Old 16th October 2009, 10:08 PM   #3
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usual pro et contra saving for later ..... or never .... or guessing game ?
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Old 16th October 2009, 10:35 PM   #4
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Old 16th October 2009, 10:58 PM   #5
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Quote:
I have an Ixys part in the amplifier I am presenting at BAF 09
Speaking of Ixys: Did you ever measure any of their P-channel mosfets for linearity?

I got Ixys N-channel mosfets as surplus pretty cheap, and buying their p-channel counterparts to have complementary pairs would make most sense for me. It would be good to know that they don't have the same IRF linearity quirk.
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Old 22nd October 2009, 04:51 PM   #6
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Thank you very much Papa for the reply
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Old 23rd October 2009, 09:41 AM   #7
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this could be a very fine MOSFET for audio - see datasheet
http://ixdev.ixys.com/DataSheet/DS10...10N20L2%29.pdf
the not presently appropriate P-channel part is only a problem for beginners and inexperienced engineers, but not for advanced developers of audio amplifiers. Companies such as Quad (Super-ß and Current Dumping), SUMO (Circlotron / CSPP), NAD ("306", Quasi-complementary) and Creek (Totem Pole) has introduced already more as 10 years ago and demonstrated, that P-CH MOSFET and PNP transistors for output power stages are not necessary. The company "Aussie Amplifiers" (Amplifier Kits - Audio Amplifier Modules - MOSFET Amps) also work with only one genus MOSFETs according to the philosophy of Bengt Olsson (Electronics World:" Better Audio from non-complements? "Bengt Olsson Dec 1994 page 988)
Thus, P-Channel MOSFETs for audio amplifiers really have no justification in currently days.
In this context, I have create an detailed overview about a wide range of power amp concepts with only N-Channel MOSFETs in power output stages - about the URL
Only N-Channel MOSFETs (NMOS); better Audio from non complements by Audio Power?

Last edited by tiefbassuebertr; 23rd October 2009 at 09:50 AM.
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Old 24th October 2009, 06:17 AM   #8
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Yes I am a big fan of the quasi-complemetary output stage
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Old 25th October 2009, 04:30 AM   #9
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tiefbassuebertr, the Ciss on your mosfet is sky-high. How would you get around it?
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Old 25th October 2009, 11:04 AM   #10
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Quote:
Originally Posted by Nelson Pass View Post
I have an Ixys part in the amplifier I am presenting at BAF 09.
Mean you "burning amplifier festival 2009" or is BAF-09 already a new project?

Quote:
Originally Posted by carpenter tiefbassuebertr, [B
the Ciss on your mosfet is sky-high. How would you get around it?[/B][/COLOR]
my English is not good and my colloquial (conversational) English is even worse;
mean you what of this topology I would prefer?

Last edited by tiefbassuebertr; 25th October 2009 at 11:10 AM.
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