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This paper presents a dynamic voltage scaling (DVS) compatible single-inductor multiple-output (SIMO) voltage regulation module that enables smaller passives for a given output power, while maintaining power quality (low output ripple), suppressing cross regulation, and improving efficiency at high switching frequency. First, continuous-conduction mode (CCM) operation is utilized to deliver higher...
This paper analyzes the effect of variations in the parameters of an Integrated Voltage Regulator (IVR) and its impact on the power/performance of a system of IVR driven digital logic circuit. The coupled analysis of IVR and digital logic considering variations in the integrated passives, power train FETs and controller transistors shows, compared to an off-chip VR, variations in IVR induce much larger...
This paper studies the potential and challenges of integrating an inductor based DC-DC converter based voltage regulator module (VRM) as a separate die with processor for high-performance power delivery network (PDN). The frequency domain analysis of PDN considering the converter shows 3D integration of VRM improves PDN impedance but the effectiveness depends on the converter design and whether the...
This work studies the potentials and challenges of designing ultra-low-power analog circuits exploiting unique characteristics of Tunnel-FET (TFET). TFET can achieve ultra-low quiescent current (∼pA). In the subthreshold operation, TFET exhibit subthreshold swing lower than 60mV/decade, and hence higher transconductance per bias current than the MOSFET. TFET also exhibit very weak temperature dependence,...
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