Breaking News
Comments
Newest First | Oldest First | Threaded View
goafrit
User Rank
Manager
Re: Hot topics
goafrit   12/3/2013 10:17:15 AM
NO RATINGS
We are saying the same thing. Analysis of weak inversion operation of MOSFET is largely established. You do not expect to make high speed systems with that. 

krisi
User Rank
CEO
Re: Hot topics
krisi   11/11/2013 11:19:27 AM
NO RATINGS
It is not as simple @goafrit...smaller Vgs produces smaller Id current and the power goes down...but the device speed goes down too so now you need more time to complete the same task...it is not obvious at what Vgs or Vdd the energy will be minimized...fairly complex analysis is required...Kris

goafrit
User Rank
Manager
Re: Hot topics
goafrit   11/9/2013 3:19:56 PM
NO RATINGS
>> There is a large number of papers published at ISSCC and IEEE Journal of Solid St Ckts that explain why the energy is minimized in sub-threshold

Simply reason - you operate with the least amount of current, range of picoAmp

krisi
User Rank
CEO
Re: Hot topics
krisi   11/2/2013 10:39:40 AM
NO RATINGS
There is a large number of papers published at ISSCC and IEEE Journal of Solid St Ckts that explain why the energy is minimized in sub-threshold

goafrit
User Rank
Manager
Re: Hot topics
goafrit   11/1/2013 8:10:20 PM
NO RATINGS
>> It is well proven in the literature that operating in sub-threshold minmizes power dissipation in digitla VLSI ckts

I am not aware you can bias digital circuits in sub-threhold. I know when they do sub-t, it is always in analog portion of circuits. Digital always needs to exceed Vmid and that is way ahead of the Vt (threshold voltage) which you must stay below in sub-threshold design

krisi
User Rank
CEO
Re: Hot topics
krisi   10/3/2013 12:08:44 PM
NO RATINGS
It is well proven in the literature that operating in sub-threshold minmizes power dissipation in digitla VLSI ckts...the optimum VDD is about 0.3V-0.6V...it is very interesting to see whether these academic studies extent to a real world of high complexity processor...hence my interests...Kris

goafrit
User Rank
Manager
Re: Hot topics
goafrit   10/2/2013 8:35:58 PM
NO RATINGS
What is the unique thing about sub-thresold work in the IoT? When you work in the weak inversion, you do not get great signals. In the analog domain, there are few opportunities as you can have exponential gain but your signal degrades. What is the magic here at sub-threshold that we need to know for ARM which is a digital/uP company?

krisi
User Rank
CEO
sub-threshold
krisi   10/2/2013 4:27:47 PM
NO RATINGS
Agree Rick...sub-threshold work for IoT is the most interesting in my view

rick merritt
User Rank
Blogger
Hot topics
rick merritt   10/2/2013 10:20:37 AM
NO RATINGS
I'm hoping to hear about

--a shipping 64-bit ARM server SoC

--any shipping 64-bit ARM cores

--next steps and proof points for big.little

--sub-threshold work for IoT

It will also mark the first time I've heard from Bill Veghte since he was the up-and-coming, hard-charging head of M'soft's embedded group years ago.



Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

MSGEQ7-Based DIY Audio Spectrum Analyzer: Testing
Max Maxfield
12 comments
In my previous column on this topic, we discussed the step-by-step construction of the first pass at a MSGEQ7-based DIY audio spectrum analyzer for use in my BADASS Display project. Of ...

Karen Field

June 2014 Cartoon Caption Winner
Karen Field
13 comments
Congratulations to "Wnderer" for submitting the winning caption for our June cartoon, after much heated conversation by our judges, given the plethora of great entries.

Jeremy Cook

Inspection Rejection: Why More Is Less in a Vision System
Jeremy Cook
3 comments
Albert Einstein has been quoted as saying, "Everything should be as simple as possible, but not simpler." I would never claim to have his level of insight -- or such an awesome head of ...

Jeremy Cook

Machine Fixes That Made Me Go 'DUH!'
Jeremy Cook
21 comments
As you can see in my bio at the end of this article, I work as a manufacturing engineer. One of my favorite things that happens on a Friday late in the afternoon is to hear my phone ring ...

Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)