[sdiy] 4-terminal MOSFETs

[David G Dixon]

> > Is anyone here aware of any 4-terminal MOSFETs like 2N4351, 
> where the 
> > body is not tied to the source?  Preferably in SMD?  Preferably 
> > available in large quantities for less than a dollar each?  I can't 
> > find anything on the interwebz.
> 
> Try Advanced Linear Devices - http://www.aldinc.com - they 
> are the only MOS arrays I'm aware of that give separate 
> access to the bulk terminal (not all of them, but a few like 
> the ALD1101).

Thanks for that Achim.  This would do the job, but they're still quite
pricey (around $5) and seemingly not available in production quantities
through normal sources (no supplier has more than 100 according to
Octapart).

It's too damn bad, because this is the only way I can think of to make a
resettable bipolar integrator (short of using a large-voltage analog switch
-- I guess that's just what I'll have to do).