Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"switched capacitor (SC)"”.
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A merged two-stage converter for LED lighting applications
… LED driver for lighting applications, with a switched capacitor (SC) voltage preregulator and a HF resonant-transition inverted buck current regulator. The design, analysis and implementation of the HF stage are developed in detail, and a full merged two-stage system is implimented based on a …
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Synthesis of Multiple-Loop Feedback Switched-Capacitor Structures (Active Filters)
In this dissertation a new switched-capacitor (SC) design technique is presented. The design method is based on a building block approach where the desired transfer function is realized in a multiple-loop feedback (MF) topology by interconnecting parasitic-insensitive SC circuits. The SC structures …
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Switched capacitor networks : a novel prewarping procedure
… filter specifications prior to realization. in Switched Capacitor (SC) form are presented. These allow the design of arbitrary response requirements, exhibiting a low amount of error that normally results from the frequency warping associated with sampled-data networks. Adjustment is applied to …
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Miniaturized, low-voltage power converters with fast dynamic response
… architecture that combines the strengths of switched capacitor (SC) techniques (small size, light-load performance) with the high efficiency and regulation capability of switch-mode power converters. The resulting designs have a superior efficient-power density trade-off over traditional …
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Noise analysis of switched capacitor filters
The self noise output of switched-capacitor (SC) filters was examined. The two main noise sources in SC filters are switch transistors and the operational amplifiers. These noise sources were modeled as switch thermal white noise and op-amp input white noise. The existence of direct and …
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Differential power processing for series-stacked processors
… individual loads vary. This work demonstrates a switched-capacitor (SC) converter to balance a stack of four ARM Cortex-A8 based embedded computers. A model of a series-stack with no DPP is first discussed for the case when loads can be controlled with no power electronics. We investigate …
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Analysis and design of high power density resonant switched-capacitor converters
… very small) and high efficiency (few losses). Switched-capacitor (SC) topologies that utilize the high energy density of capacitors are a candidate for fulfilling these two criteria. However, there are inherent limitations in conventional switched capacitor converters where a designer is …
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An on-chip three-level boost converter for energy harvesting application
… technology. Leveraging the advantages of hybrid switched capacitor converters, the converter manages to provide a maximum output voltage of 4.5 V with the available 2.5 V devices in this technology. The issue of capacitor imbalance, which has always been one of the factors that hinder …
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ΚΥΜΑΤΙΚΑ ΦΙΛΤΡΑ ΔΙΑΚΟΠΤΟΜΕΝΟΥ ΠΥΚΝΩΤΗ
OVER THE PAST FIFTEEN YEARS THE SWITCHED CAPACITOR (SC) FILTERS HAVE BECOME INTERESTING ALTERNATIVES TO OTHER TYPES OF FILTERS, FOR REALIZING HIGH QUALITY, LOW-COST INTEGRATED CIRCUIT FILTERS FOR LOW FREQUENCY APPLICATIONS. IN THIS THESIS A DIRECT Z-DOMAIN SIMULATION OF LC LADDER AND UNIT-ELEMENT …
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An Investigation of Computer-Aided Analysis for Switched Capacitor Sampled-Data Filters
… are presented for computer-aided analysis of switched capacitor (SC) circuits. The first technique is based on partitioning the SC circuits into elementary subnetworks. This new approach is distinctly different from other analysis techniques, because rather than striving for complete …
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EFFICIENT VOLTAGE REGULATION USING SWITCHED CAPACITOR DC/DC CONVERTER FROM BATTERY AND ENERGY HARVESTING POWER SOURCES
… be efficient, small and cost effective. The switched-capacitor (SC) converter provides a trade-off between the efficiency, the size and the cost that is desirable in many of these new portable technologies. This dissertation investigates different circuit techniques and SC converter …
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Online and Built-in self-testing techniques for Field Programmable Analog Array
… (BIST) and online testing techniques for switched capacitor (SC) based Field Programmable Analog Arrays (FPAAs). Particularly, a BIST technique for programmable capacitor arrays (PCAs), which are essential building blocks in the SC based FPAAs, is developed and its efficiency is analyzed. …
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Advanced topologies of high step-up DC-DC converters for renewable energy applications
… including interleaved and quadratic structures, switched-capacitor (SC)-based voltage multiplier (VM) cells, and magnetically coupled inductor (CI) and built-in-transformer (BIT). The proposed converters offer outstanding features, including high voltage gain with low or medium duty cycle, a …
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45nm direct battery DC-DC converter for mobile applications
… and low memory effects. With the aggressive downscaling of CMOS, it is becoming increasingly difficult to efficiently interface the low voltage, low power digital baseband and DSP of the mobile phone with the battery which maybe at voltages as high as 4.2V. This is efficiently done by a DC-DC …
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Wireless Neural Recording and Stimulation SoCs for Monitoring and Treatment of Intractable Epilepsy
… architecture for early seizure detection is described. It the magnitude, phase and phase synchronization of two neural signals - all precursors of a seizure. The processor is utilized in an implantable responsive neural stimulator application. The architecture uses three CORDIC processing cores …
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Hybrid SC-Inductive Based Topologies for Low-volume High-efficiency Switched-mode Power Supplies
Switched-mode power supplies (SMPS) are widely used as the voltage or current regulators for electronic devices. The most commonly used SMPS are inductive converters based on conventional buck and boost converter topologies due to their simplicity and relatively high power density and efficiency. …
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On-chip Voltage Regulator– Circuit Design and Automation
… the low-drop-out (LDO) regulator and (ii) the switched-capacitor (SC)regulator. The first part of our research mainly focused on the LDO regulator. Inspired by the recent surge of interest for cap-less voltage regulators, we presented two fully on-chip external capacitor-less low-dropout …
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Signal Conditioning Circuits for Injectable Pressure Sensors
… confirmed the function of 1.8V LDO, bandgap, oscillator and VCO circuits with a wirelessly powered PCB coil. Then, a second ASIC was designed to improve the accuracy of the first ASIC using a new switched-capacitor (SC) analog front end (AFE) and a SC single-slope ADC with an inductive wireless …
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Interconnect design techniques for multicore and 3D Integrated circuits.
… For CMPs, we observe that voltage and frequency scaling (VFS) for NoC can potentially reduce energy consumption, but the associated increase in latency and degradation in throughput limits its deployment. Therefore, we propose flexible-pipeline routers that reconfigure pipeline stages upon VFS, …
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High-performance power converters leveraging capacitor-based energy transfer
… a hybrid approach is adopted, where both capacitors and inductors are used in the voltage conversion and power transfer process. Conventional capacitor-based converters, called switched-capacitor (SC) converters, suffer from poor efficiency due to the inevitable charge redistribution …