Better Power Planning


By Preeti Gupta Making the right architectural decisions for controlling power consumption and ensuring power integrity requires early identification and quantification of varying current demands in a semiconductor design. Furthermore, low-power designs pose complexities for power verification, such as significant current surges caused by clock gating or power gating transitions. In last mo... » read more

Power Delivery Networks


By Preeti Gupta That power is now at the forefront of semiconductor design is no secret. It is also true that lowering power consumption drives product competitiveness and green technology—even more so in today’s mobile-driven market. But the same drive for lower power also increases the complexity of ensuring the power integrity of a system-on-chip (SoC). The power delivery network (PD... » read more

The Bigger Picture


By Aveek Sarkar IC power consumption is dependent on its supply voltage. To reduce power consumption, and heat dissipation, IC designers strive to design for lower supply voltages. But the threshold voltage that controls switching in digital CMOS devices hasn't scaled accordingly from reliability and other considerations. As the supply voltage reduces down close to the threshold voltage of ... » read more

Noise Coupling Analysis


By Arvind Shanmugaval Integrating digital and mixed-signal IP blocks in SoCs poses a considerable challenge to verification of power/ground and substrate noise. Traditional methods of power supply noise analysis are unable to meet the demands of today’s highly integrated designs with multiple low- power design techniques. Existing methods also do not provide sufficient capacity or the capabi... » read more

Picking The Right Models


By Ji Zheng As the focus on “efficient computing” increases and ICs are fabricated using process technologies that are more sensitive to voltage fluctuations, accurate modeling and prediction of chip-level, package-level and system-level behavior becomes a necessary design step. The use of chip macro models enables 3D-IC and IC-package-PCB co-analysis for power integrity, signal integrity,... » read more

New Stacking Issues


Reduced form factors, higher performance, and the demand for lower power necessitate the need for 3D-IC/silicon interposer designs with through-silicon vias (TSVs). That also creates major design challenges in three areas. The verification of power, signal, and reliability integrity—particularly with multi-stacked die on silicon interposer with TSVs—presents issues that can only be overcome... » read more

Top 5 Reasons For Power Consumption Waste


By William Ruby Low-power seems to be on everyone’s mind these days, and it’s not just the chip design teams. One common consumer complaint is that the “battery life is way too short”! And of course, we all know this one, “OMG – that laptop is sure hot“! Even data center facilities managers lament, “We can’t supply enough power to the equipment—and when we do, we can’t co... » read more

Top 5 Reasons For Power Delivery Failure


By Matt Elmore Technology scaling has brought with it a myriad of causes for power delivery network (PDN) failure. Even a few years ago, it was simply enough to run static and dynamic power analysis to expose any voltage drops caused by weak power routing. No one cared about modeling the package and PCB. To account for clock jitter, you could simply throw in a whole nanosecond of clock uncerta... » read more

Power Budgeting 101


By Aveek Sarkar With all the processing power that is being designed into smart and superphones now, I wonder what would happen if all four multi-GHz processors were to execute simultaneously? How long would that small battery last—and would anyone be able to hold it in their bare hands?   [caption id="attachment_6305" align="alignnone" width="342"] Phone surface temperature as a ... » read more

Quicker Turnaround


By Aveek Sarkar Statistics indicate the increase in sales for mobile handsets in the emerging economies will be from the sale of smart phones. According to a Nielsen report, Brazilian sales of smart phones were up 128% in 2010, compared to 2009. These emerging economies have traditionally been served by standard cell phones that provided voice and texting needs (Fig. 1), but the consumers i... » read more

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