[SI-LIST] : Undoped or Non-doped Isolation Transistor

About this list Date view Thread view Subject view Author view

From: Farrokh Mottahedin (Farrokh.Mottahedin@quantum.com)
Date: Mon Aug 07 2000 - 09:58:01 PDT


While trying to understand the operation of a complex 3.3 volt I/O cell, I
noticed one transistor that is designated "non-doped" device. This device is
on the output of a bi-di cell, and if I understand correctly, provides
isolation in case of bus "contention" involving another 5 volt-based
interface on the same bus. I have been unable to find any information or
even a mention of non-doped devices in my standard textbooks. My question
is: How does a non-doped device operate, and how does it differ from all the
other P and N-FETs?

Regards,

Farrokh Mottahedin

Quantum Corp.
500 McCarthy Blvd.
Milpitas, CA 95035
(408)324-7934
farrokh.mottahedin@quantum.com

**** To unsubscribe from si-list or si-list-digest: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Wed Nov 22 2000 - 10:50:58 PST