60w Mosfet

Iván Francisco · 14th May 2007, 08:15 PM

Hi,
need opinions about this circuit a 60W MosFet Audio Amplifier

http://www.redcircuits.com/Page100.htm

Thanks in advance

AndrewT · 14th May 2007, 09:27 PM

Quote:

In the original circuit, a three-diode string was wired in series to R10. Two of these diodes are now replaced by a red LED in order to achieve improved quiescent current stability over a larger temperature range. Thanks to David Edwards of LedeAudio for this suggestion.

I would be very wary of this change to the bias temperature compensation.

davidallancole · 14th May 2007, 09:37 PM

Why is that Andrew?

Leolabs · 15th May 2007, 02:49 AM

Depends on what type of MOSFETs.

Workhorse · 15th May 2007, 03:00 AM

That design is good for lateral mosfets only, but never attempt it with hexfets or verticals.

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14th May 2007, 09:37 PM	#3
davidallancole diyAudio Member Join Date: Nov 2005	Why is that Andrew?

15th May 2007, 02:49 AM	#4
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Depends on what type of MOSFETs.

15th May 2007, 03:00 AM	#5
Workhorse diyAudio Member Join Date: Dec 2004	That design is good for lateral mosfets only, but never attempt it with hexfets or verticals.

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