Maybe Clockless Chip Design’s Time has Come

Maybe Clockless Chip Design’s Time has Come
by Tom Simon on 11-16-2015 at 4:00 pm

There have always been novel technologies vying to compete with conventional design practices. It is hit or miss on the success of these ideas. In the 90’s I recall speaking to someone who was convinced that they could effectively build computers based on multilevel logic. This, as we know did not pan out. But there have been many … Read More


How Good Are Your Clocks?

How Good Are Your Clocks?
by Paul McLellan on 04-29-2015 at 7:00 am

One of the trickiest tasks in designing a modern SoC is getting the clock tree(s) right. The two big reasons for this:

  • the clocks can consume 30% or more of the power of the whole chip, so minimizing the number of buffers inserted is critical to keeping power under control
  • the clock insertion delay and clock skew have a major impact on
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Cadence’s New Implementation System Promises Better TAT and PPA

Cadence’s New Implementation System Promises Better TAT and PPA
by Tom Simon on 03-12-2015 at 1:00 am

On Tuesday Cadence made a big announcement about their new physical implementation offering, Innovus, during the keynote address at the CDNLive event in Silicon Valley. Cadence CEO Lip-Bu Tan alluded to it during his kick off talk, and next up Anirudh Devgan, Senior Vice President, Digital & Signoff Group, filled in more … Read More


Living with DO-254? You need Aldec!

Living with DO-254? You need Aldec!
by Luke Miller on 04-30-2014 at 4:00 pm

I will say that as popular as DO-254 and the like is, I am not the fella for that. It can take the simplest of designs into a realm of test and verification like you have never seen before. Yes, when I am flying I happen to be a big fan of this rigorous testing but you will not find me doing that job anytime soon. While the topic is very dry, it … Read More


A Tool Conceived With Designers’ Input and Developed from Scratch

A Tool Conceived With Designers’ Input and Developed from Scratch
by Pawan Fangaria on 03-12-2014 at 10:15 am

If we look at the past, most of the EDA tools in the semiconductor design space have originated from a designers’ need to do things faster. Regardless of whether it is design exploration, manual design, simulation, verification, optimization (Power Performance Area – PPA) and many other steps in the overall design flow.… Read More


20nm IC production needs more than a ready Foundry

20nm IC production needs more than a ready Foundry
by Pawan Fangaria on 08-23-2013 at 11:00 am

I think by now all of us know, or have heard about 20nm process node, its PPA (Power, Performance, Area) advantages and challenges (complexity of high design size and density, heterogeneity, variability, stress, lithography complexities, LDEs and so on). I’m not going to get into the details of these challenges, but will ponder… Read More


Properly Handing Of Clock Tree Synthesis Specifications

Properly Handing Of Clock Tree Synthesis Specifications
by Randy Smith on 04-28-2013 at 1:00 pm

Given today’s design requirements with respect to low power, there is increasing focus on the contribution to total power made by a design’s clock trees. The design decisions made by the front-end team to achieve high performance without wasting power must be conveyed to back-end team. This hand-off must be accurate… Read More


Schematic, IC Layout, Clock and Timing Closure from ICScape

Schematic, IC Layout, Clock and Timing Closure from ICScape
by Daniel Payne on 06-08-2012 at 11:10 am

Before this DAC I had never even heard of ICScape, so on Monday and Wednesday I visited their booth to find out their story.

Steve Yang, Ph.D. (Co-founder and President), Ravi Ravikumar (Marketing)

ICScape was founded in 2005 in Santa Clara by Steve Yang (Circuit Design engineer for microprocessor, Synopsys) and Jason Xing (Sun… Read More


Cadence aquires Azuro

Cadence aquires Azuro
by Paul McLellan on 07-12-2011 at 12:20 pm

Cadence this morning announced that it has acquired Azuro. Azuro has become a leader in building the clock trees for high performance SoCs. A good rule of thumb is that the clock consumes 30% of the power in an SoC so optimizing it is really important. Terms were not disclosed.

The clock trees involve clock gating which can reduce clock… Read More


Clocks Will Be Clocks

Clocks Will Be Clocks
by glforte on 10-14-2010 at 4:14 pm

Clock designers are an enigma. Clock designers in general are die hard Star Wars fans, own vintage Porsches that leak oil by the gallon, usually have lava lamps in their offices/cubicles, wear fancy leather jackets in the peak of summer, and have like-minded clock designers as best lunch buddies. … Read More