output mosfet driver

lazy · 28th March 2002, 05:48 AM

I want to build a preamp that use opa2604 as main amplifier, and want to use a pair as output driver to increase the output capacity. Which mosfet is best to do it? The supply voltage is +- 18v.
Thanks

Nelson Pass · 28th March 2002, 06:58 PM

What load did you want to drive?

lazy · 29th March 2002, 05:38 PM

Thanks reply, Pass.
I mean use a couple of mosfet in the preamp output stage. The mosfet is biased and connect to opa2604 output pin directly. Mosfet output is RCA connector. Which mosfet is better, IRF510 and IRF9510 or a small JFET is enough?
Any advice is appreciated.

lazy

Nelson Pass · 29th March 2002, 06:42 PM

Try a Zetex ZVN3310 and ZVP3310 if your current
requirements don't exceed 10 ma

HarryHaller · 29th March 2002, 07:36 PM

Hey! I thought they were only good for building computers with. I wonder if the mosfets are fast enough to use inside the feedback loop of the OPA2604. This might be a little tricky for a beginner though.

H.H.

lazy · 30th March 2002, 05:13 AM

I just read the datasheet of zvn3310, it is a nice mosfet. I will try it.
Thanks!

28th March 2002, 05:48 AM	#1
lazy diyAudio Member Join Date: Jan 2002	output mosfet driver I want to build a preamp that use opa2604 as main amplifier, and want to use a pair as output driver to increase the output capacity. Which mosfet is best to do it? The supply voltage is +- 18v. Thanks

29th March 2002, 07:36 PM	#5
HarryHaller Banned Join Date: Feb 2002 Location: Dallas,Texas	Zetex mosfet Hey! I thought they were only good for building computers with. I wonder if the mosfets are fast enough to use inside the feedback loop of the OPA2604. This might be a little tricky for a beginner though. H.H.

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28th March 2002, 06:58 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	What load did you want to drive?

29th March 2002, 05:38 PM	#3
lazy diyAudio Member Join Date: Jan 2002	Thanks reply, Pass. I mean use a couple of mosfet in the preamp output stage. The mosfet is biased and connect to opa2604 output pin directly. Mosfet output is RCA connector. Which mosfet is better, IRF510 and IRF9510 or a small JFET is enough? Any advice is appreciated. lazy

29th March 2002, 06:42 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	Try a Zetex ZVN3310 and ZVP3310 if your current requirements don't exceed 10 ma

30th March 2002, 05:13 AM	#6
lazy diyAudio Member Join Date: Jan 2002	I just read the datasheet of zvn3310, it is a nice mosfet. I will try it. Thanks!

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