FW: Texas Instruments IC's

[Tim Ressel]

Tony,

I looked up some Hexfets. 25uV leakage. Not so good. Next I'll look up your
parts to compare. Thanks for the info!


Tim Ressel--Compliance Engineer
Hewlett-Packard
Verifone Division
916-630-2541  
tim_r1 at verifone.com                     



-----Original Message-----
From: Tony Clark [mailto:clark at andrews.edu]
Sent: Tuesday, May 30, 2000 9:36 AM
To: Synth-DIY
Subject: Re: FW: Texas Instruments IC's


> Speaking of ECG, these folks (ECG and NTE) can be a nifty resource. I was
> looking for a suitable FET for a VCO. The NTE466 has some decent specs 
> and seems to work okay. And I didnt have to wait for the UPS guy; I got 
> instant gratification, which is soooo important!

   I've used the 466 for some time in my VCO projects and they are pretty 
good.  My biggest problem with them tends to be that they often don't 
reset the VCO all the way to zero (varies from one to the next) unless you 
drive them pretty hard.  That and they tend to be _really_ too expensive 
(okay, so I am a _little_ cheap) for my liking for not working as well as 
other types of FETs.
   My next VCO run will most likely switch to BS170 which has much better 
specs than the 466 but requires opposite gate control and is only $0.45 
each.  Probably an even better type would be an MPF6660 which has lower 
on resistance and faster switching time, but I haven't played with it, yet!
   Of course there's always MOSFETs...maybe someone has a direct drop in 
replacement for a 466?  I'd love to know!

   Tony

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