Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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.

Register Log in

The Asynchronous Logic - link collection

Status
Not open for further replies.

jimjim2k

Advanced Member level 3
Joined
May 17, 2001
Messages
996
Helped
23
Reputation
46
Reaction score
13
Trophy points
1,298
Activity points
7,270
Hi

The complexity of today's VLSI systems requires new design methods based on asynchronous techniques, concurrency, high-level synthesis, and verification. The research of the Asynchronous VLSI group at Caltech focuses on methods and tools for the design of high-performance and low-energy asynchronous digital circuits. Digital circuits are called "asynchronous" when they don't use clocks.

Check The following URls for starting point on "The Asynchronous Logic"

1. h**p://www.cs.man.ac.uk/async/
2. h**p://www.cs.man.ac.uk/async/tools/index.html (Tools)
3. h**p://www.cs.man.ac.uk/async/background/index.html
4. h**p://www.async.caltech.edu/

* -> t

tnx
 

roli

Full Member level 5
Joined
Apr 29, 2001
Messages
246
Helped
9
Reputation
20
Reaction score
9
Trophy points
1,298
Location
'SiliconWafer' Island
Activity points
1,824
Designing Asynchrounous Digital circuits is the forefront challenge in Digital VLSI Design - and is the future for low-power, very high-speed organic based technologies.
Nice links !
 

matteo128

Junior Member level 2
Joined
Oct 19, 2001
Messages
22
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
152
Thanks for the pointers.

Asynchronous logic is an interesting but definitely not new topic.

There was lot of research done on this topic in sixties, even a textbook or two were written at the begining of the seventies and then the subject went out of fashion only to reappear again 5 or 6 years again.

There are several fundamental unsolved problems there that limit the applicability to very specific problems. This reminds me of neural logic or fuzzy systems. They originaly appeared forties and sixties respectively. After a period of research they dissapered only to come back as a fashionable topic 5 0r 10 years ago. And again they didn't become a panacea as it was expected but only solution to very specific problems.

Matteo
 

Froed

Junior Member level 2
Joined
Feb 21, 2002
Messages
20
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
96
Does anyone have links to High-Speed-Digital Design ( With Verilog or VHDL ) ???
 

rfsystem

Advanced Member level 3
Joined
Feb 25, 2002
Messages
914
Helped
148
Reputation
292
Reaction score
38
Trophy points
1,308
Location
Germany
Activity points
9,550
I have studied at 95 the realisation of a 16bit ALU with asynchron logic. Found for example the medium carry time for the ADD operation is only log2(n). The result is that it is not complicated to built up asynchron functional blocks but to link them together in a system architecture is not supported by the today tools. So on the circuit level there are solutions but the system architects need rethinking and also the test methologies.
 

poorking

Newbie level 6
Joined
Jan 17, 2002
Messages
12
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
14
the idea is really grate. But there is still a long way to go.
 

LatDrIvE

Member level 4
Joined
Nov 28, 2002
Messages
68
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Location
athens
Activity points
415
Re: The Asynchronous Logic

hello all,
i have seen the post and because i am involving with the asynchronous logic i would like to say that it is very promising but since now still be far away from the production of a full product. the only company that produce a totally asynchronous micro is Philips ( spin off " handshake solutions"), by using the tangram language.

Intel, Atmel, Caltech have shown their interest about asynchronous desing but eventhow the industry's downfall does not left any big thoughts for seriously asynchronous research yes. The industry is looking for GALS (globaly asynchronous localy synhronous) mostly than pure asynchronous design.

The major advantage about asynchronous is the low EMI and today's researh is mostly in smartcards security. The Dual-rail encoding ( one bit represented as "bit bit' "ie. logic 1 is "01") is providing efficient security but the switching frequency is high so that the power. These was some thought anf facts about asynchronous logic design.

thank you...
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top