Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
goafrit
User Rank
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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.



Radio
LATEST ARCHIVED BROADCAST
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Most Recent Comments
andybe
 
Bruzzer
 
Bruzzer
 
CB_EE
 
uv-linkedin
 
CB_EE
 
CB_EE
 
uv-linkedin
 
CB_EE
Like Us on Facebook
Special Video Section
The LTC®6363 is a low power, low noise, fully differential ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...