Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!cs.utexas.edu!uunet!microsoft!alexm
From: alexm@microsoft.UUCP (Alexander Mulder)
Newsgroups: comp.unix.cray
Subject: Re: GaAs CMOS in Cray-3 ?
Keywords: Cray-3, GaAs, LSI, CMOS, hole mobility
Message-ID: <7079@microsoft.UUCP>
Date: 25 Jul 89 16:26:02 GMT
References: <7048@microsoft.UUCP> <3892@portia.Stanford.EDU> <4939@alvin.mcnc.org>
Reply-To: alexm@microsoft.UUCP (Alexander Mulder)
Distribution: usa
Organization: Microsoft Corp., Redmond WA
Lines: 13

In article <4939@alvin.mcnc.org> schacham@mcnc.org.UUCP (Samuel E. Schacham) writes:
>A combination of enhancement-depletion DOES NOT function as a CMOS!
>There are basic differences.

I agree : you need some kind of P-device to create a CMOS circuit.
The difference between enhancement or depletion devices is of little
use in this, I think. One could think of tricky alternatives for CMOS
using only N transistors, with a steered N as pull-up, but that would
really complicate the design. So, the question remains what Cray uses !
If Cray Computer already has some unix sites installed, they might
tell us... :-)

--- Alexander Mulder -------------------------------- uunet!microsoft!alexm ---