Power? It’s The Apps, Stupid!


Shabtay Matalon When I bought my first iPhone, I envisioned using it mostly to make phone calls and occasionally to view e-mails and browse the Web. For navigation, I used a separate GPS. But all this changed when I realized that I can use the Waze App on my iPhone for real-time navigation or to play games while listening to music on a boring coast-to-coast domestic flight. These new “apps�... » read more

The Power Of Logic


By Barry Pangrle CMOS logic has been dominant since nMOS gave way back in the 1980s. Dynamic logic, like domino, has seen its application in high-speed and often hand-crafted datapath circuits. The potential energy efficiency of operating at near-threshold voltage is very enticing but having to deal with variability issues has made engineers reluctant to try to do more at lower voltages. The q... » read more

Improved Efficiency


By Bhanu Kapoor We constantly hear about process technology advances and their impact on power consumption of ICs, but the power management techniques have remained the same over last few process technology generations. Power gating, dynamic voltage and frequency scaling, and threshold voltage scaling have been the key power management techniques since the 90nm process technology. Clock gating... » read more

A Low-Power Riddle


By Cary Chin I’m thinking of a mobile electronic device, introduced in 2012, at the high end of its market segment, eventually to be named “Product of the Year” for 2012. But it wasn’t introduced without the usual flurry of energy-efficiency related problems, with initial complaints such as, “the product worked well, but the battery drained way too fast, even when it was turned off!�... » read more

Challenges In IC And Electronic Systems Verification


By Aveek Sarkar Designing successful electronic systems that can meet the needs of a challenging and quickly evolving mobile market requires design teams to solve critical problems such as power efficiency, unrealistic schedules, and cost-down considerations. In this first of a three-part series, we will look at these challenges. Part 1: The Growing Challenges Designing electronic systems ... » read more

Start Early, Cover All The Bases


Design for low power always has challenged designers and design tools. You need to have accuracy, because you are estimating implementation-centered parameters, but you need to start early, before implementation, if you are to have any hope of meaningfully reducing power. Sure, you can always play with body-bias, but that is a crude control. Real reductions after architecture always come throug... » read more

The Next Limiting Factor


It’s an interesting time in the semiconductor industry. Nodes continue to shrink, we’re on the verge of adopting a new type of transistor (finFET), and there’s also a shift away from planar CMOS – to name a few things on the horizon. What’s also extremely interesting is how design automation and semiconductor manufacturing technology continues to keep the pace with it all. However,... » read more

Best Practices


By Tom Fitzpatrick Active power control management for low-power designs has become a hot topic, especially with the latest update to the Unified Power Format standard. Version 2.1 was approved by IEEE on March 6, 2013. UPF gives the ability to specify power control for different parts of a design, separate from the RTL itself. The advent of low-power design has greatly increased the comple... » read more

EDA Power Moves


By Barry Pangrle There have been some recent moves at the top of a couple of smaller but notable EDA companies. At Calypto, Doug Aitelli, who was named the CEO in January 2011 (he succeeded Tom Sandoval who then joined the Board of Directors) was replaced by industry veteran Sanjiv Kaul, the company announced last month. When Doug took over the reins at Calypto, the company described itself... » read more

Guesswork, And Other Design Paradigms


PPA for soft IP seems like an oxymoron. How do you determine the implementation characteristics (PPA — Power, Performance and Area) for something that has not yet been implemented? Flying blind until implementation would be a rookie move. More likely you are going to estimate based on a prior implementation. Not a bad approach if the IP hasn’t changed significantly and the target library is... » read more

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