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Among potential candidates to replace the CMOS transistor channel, several materials such as CNTs, GNRs, and SiNW show an interesting behavior known as “Ambipolarity.” Ambipolarity, means that n- and p-type behavior can be observed in the same device. By adding a fourth terminal to control the ambipolarity, a new category of devices has seen the light under the name of Ambipolar Independent Double...
An on-chip buck converter with 3D chip stacking is proposed and the operation is experimentally verified. The manufactured converter achieves a maximum power efficiency of 62% for an output current of 70mA with a switching frequency of 200MHz and a 2x2mm on-chip LC output filter in 0.35mum CMOS. The use of glass epoxy interposer to increase the maximum power efficiency up to 71.3%, and the power efficiency...
This paper presents an innovative structure based on 3 dimensional integration technology, where ultra thin inter layer dielectric enables a dynamic threshold voltage (VTH) control. A sequential process flow is proposed to fabricate 3D devices with dynamically tunable VTH. This ability can be exploited to design SRAMs cells with increased stability and surface density compared to planar technology...
Continuous scaling, necessary for enhanced performance and cost reduction, has pushed existing CMOS materials much closer to their intrinsic reliability limits, forcing reliability engineers to get a better understanding of circuit failure. This requires that designers will have to be very careful with phenomena such as high current densities or voltage overshoots. In addition to the reliability issues,...
Novel 3D stacked gate-all-around multichannel CMOS architectures were developed to propose low leakage solutions and new design opportunities for sub-32 nm nodes. Those architectures offer specific advantages compared to other planar or non planar CMOS devices. In particular, ultra-low IOFF (< 20 pA/mum) and high ION (> 2.2 mA/mum) were demonstrated. Moreover, those transistors do not suffer...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
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