Experts At The Table: Process Technology Challenges

By Mark LaPedus Semiconductor Manufacturing & Design sat down to discuss future transistor, process and manufacturing challenges with Subramani Kengeri, vice president of advanced technology architecture at GlobalFoundries; Carlos Mazure, chief technical officer at Soitec; Raj Jammy, senior vice president and general manager of the Semiconductor Group at Intermolecular; and Girish Dixit, v... » read more

Lessons Learned In 4G LTE

By Ann Steffora Mutschler While 4G LTE has moved into the mainstream, there are lessons to be learned about these very complex modems, especially from the perspective of balancing power and performance. The road to mainstream wasn’t exactly smooth sailing. “4G LTE initially got a bad rap for battery life, for power consumption,” said Pete Hardee, low-power design solution marketin... » 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

iPhone 5 – Verizon has a hit!

By Cary Chin My iPhone 5 was delivered to my door as promised on Sept. 21. The UPS guy had a truck full of them, and seemed quite happy to be getting so much attention as he was making his rounds. As with every other iPhone, I carefully unboxed it with some anticipation, but somehow I felt like there was less excitement this time around. After 5 years of iPhone mania, was the luster starti... » read more

4G LTE Vs. 3G, Part II

By Cary Chin Last month we saw some interesting data in our investigation of energy efficiency of 4G LTE transmission versus 3G transmission on the new iPad. The data above suggests that in 4G LTE mode, the new iPad used roughly the same amount of energy (3.8Wh) for viewing our test movie (Star Trek, 2:06:46, 138MB) locally vs. streaming it from the Internet. In contrast, using the 3G r... » read more

Unexpected Results

By Cary Chin In my ongoing quest to understand power efficiency at the product level of our amazing gadgets, I’ve been trying to set up experiments to compare 4G LTE and 3G data transmission. It seems to make intuitive sense that transferring data faster (my Speed Test runs show Verizon 4G LTE speed up to 20Mbps, vs. a maximum of around 700Kbps in 3G in and around Palo Alto) should consume m... » read more