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Depletion mode?
Depletion mode?
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Old 4th October 2007, 02:27 AM   #1
CBS240 is offline CBS240  United States
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Default Depletion mode?


Does anyone happen to know if there exists a P-channel depletion mode mosfet? Preferably one similar to this one in characteristics... http://www.supertex.com/pdf/datasheets/DN3525.pdf or http://www.supertex.com/pdf/misc/d_m..._SG_device.pdf

Enhancement or depletion doesn't really matter, they would be used as a cascode in the VAS of a balanced bridge circuit (...attempt ). That is, they are used as a common gate amplifier. I have read that Trench type fets aren't good for audio, partly because of the input capacitance relation with Vds. I think from the data sheet the DN3525 would be a better part, or anything that is similar, but I can only find N-channel types, and of course at least rough complements are desired. Case style is completely open though since this circuit doesn't really exist yet. Is there anyone who makes a P-channel depletion mode mosfet? Does such a thing even exist?

All the trouble I've ever been in started out as fun......
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Old 4th October 2007, 08:52 PM   #2
lucaigor is offline lucaigor  Italy
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Have you checked the IXYS web site?
They are specilized in power semiconductor,
and if I'm not wrong they have P-channel mosfet (depletion).
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