Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

threshold voltage vs leakage current

Status
Not open for further replies.

cooldude040

Member level 2
Joined
Oct 26, 2007
Messages
49
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,622
As the technology is shrinking down the threshold voltage is decreasing but our leakage is increasing right? so wt we can do to ocntrol the leakage current ?
One thing is by increasing the threshold voltage but threshold voltage is not in our hand to increase right? it comes from the foundy....so wt we can do?

Plz explain the clear concept not by the equations...
Thanks
 

A.Anand Srinivasan

Advanced Member level 5
Joined
Oct 15, 2005
Messages
1,792
Helped
257
Reputation
514
Reaction score
39
Trophy points
1,328
Location
India
Activity points
10,680
technology scaling can be done without varying the threshold voltage too.... same technology can be made with different threshold voltages... it depends on doping and material too.....
 

research235

Full Member level 6
Joined
Mar 15, 2006
Messages
331
Helped
24
Reputation
48
Reaction score
6
Trophy points
1,298
Activity points
3,100
read any low power design material. will find more details and information

suresh
 

shankarmit

Full Member level 3
Joined
Jun 22, 2005
Messages
186
Helped
31
Reputation
62
Reaction score
22
Trophy points
1,298
Location
India
Activity points
2,858
Thats why u get standard cells as HVT RVT and LVT, (Higher,regular and lower thershold voltages).

U can use this to reduce leakage..But less leakage cell will have more delay..i.e., HVT cells have more delay than LVT.

so u can use LVT for timing critical paths and other places use HVT to reduce overall leakage..

Thanks
 

jimaaa0

Newbie level 6
Joined
Nov 15, 2007
Messages
14
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,335
deal with leakage current shouldn't be take account by technology engineer? what could do a digital designer ?
 

rajesh9999

Member level 2
Joined
Oct 19, 2005
Messages
44
Helped
14
Reputation
28
Reaction score
12
Trophy points
1,288
Activity points
1,616
Threshold voltage can be changed dynamically. Remember a transistor is a four terminal device. In digital design a transistor is represented by three terminals only (gate, drain and source respectively) because the fourth terminal which is '"substrate"
is by default connected to vdd(in case of pnp) or gnd(in case npn). By biasing the substrate voltage to other than vdd or gnd one can change "vt" of that particular transistor.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top