Polling: What are yuor preferred signal mosfet?

[Aiace]

As the title....

Aiace

[AndrewT]

I thought the consensus was that mos is too noisy for signal duty.

[Mr Evil]

Unfortunately it's hard to find ones that come as complementary pairs. I haven't tried that many, but I have had some success with ZVN2106A/ZVP2106A, which just happen to be the first ones I tried. Zetex do a few others which might work well too.

Originally posted by AndrewT
I thought the consensus was that mos is too noisy for signal duty.

I've done quite a few experiments here, and they are definitely far too noisy for use in an input stage, but they work well in a Vas... really well.

[darkfenriz]

Just wanted to say nice to see Evil back!

Sorry for OT.

[CBS240]

Originally posted by Mr Evil
I've done quite a few experiments here, and they are definitely far too noisy for use in an input stage, but they work well in a Vas... really well.

I agree. Particularly when used as common gate. (cascode)

[Mr Evil]

Originally posted by darkfenriz
Just wanted to say nice to see Evil back!

Sorry for OT.

And it's nice to be back!

Originally posted by CBS240

I agree. Particularly when used as common gate. (cascode)

Of course! They work well in the normal common source VAS too though. They work well for the same reason that putting a buffer before the VAS works - they present an easy load for the input stage. You can cascode them to reduce their capacitance to improve that even further.