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 117 for “"SWITCHED CAPACITOR"”.
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Multi Resonant Switched-Capacitor Converter
This thesis presents a novel Resonant Switched-Capacitor Converter with Multiple Resonant Frequencies, abbreviated as MRSCC for both high density and efficiency non-isolated large step-down Intermediate Bus Converter (IBC). Conventional Resonant Switched-Capacitor Converter (RSCC) proposed by …
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Stacked switched capacitor energy buffer architecture
Electrolytic capacitors are often used for energy buffering applications, including buffering between single-phase ac and dc. While these capacitors have high energy density compared to film and ceramic capacitors, their life is limited and their reliability is a major concern. This thesis presents …
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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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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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A zero-crossing switched-capacitor filter design
Design of switched capacitor circuits in scaled CMOS technologies is becoming difficult because of low device intrinsic gain and reduced power supply voltage. To solve these problems, comparator-based switched-capacitor (CBSC) circuits and zero-crossing based circuits (ZCBC) were suggested as a …
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Analysis of soft charging switched capacitor power converters
Switch capacitor converters are a microcosm in the world of power converters and as such have received little attention in both research and application. There is a perception that they possess many undesirable operating characteristics, such as inefficiency, poor output regulation and tracking, …
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Novel Topology for Capacitively Isolated Switched Capacitor Converter
… a novel topology for capacitive isolation in switched-capacitor DCDC converters, taking inspiration from previous work1. The research endeavors to develop a unique switched-capacitor topology that enables isolation between input and output voltages. By integrating elements of the …
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A Comparator-Based Switched-Capacitor delta sigma modulator
Comparator-Based Switched-Capacitor (CBSC) is a relatively new topology that replaces op-amps in sampled-data systems with a comparator and a set of current mirrors. CBSC is expected to lower power consumption, and to avoid several delicate tradeoffs of op-amp circuits. In this paper, the original …
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Digital signal processing analysis of switched capacitor filters
… and stochastic signal analysis is presented on switched capacitor filters. This relatively new discrete-time circuit design technology provides a wide field of applications in the areas of filters, circuitry, and communications. It also raises numerous problems and challenges in both …
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A switched-capacitor pipelined BiCMOS analog-to-digital converter
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Virtual ground reference buffer technique in switched-capacitor circuits
The performance of switched-capacitor circuits depends highly on the op-amp specifications. In conventional designs, trade-offs in speed, noise, and settling accuracy make it difficult to implement power-efficient switched-capacitor circuits. The problem originates from the inverse relationship …
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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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A comparator-based switched-capacitor pipelined analog-to-digital converter
A new comparator-based switched-capacitor(CBSC) technique is proposed that eliminates the need for high gain op-amps in switched-capacitor circuits. The CBSC technique replaces the op-amp in switched-capacitor circuits with a comparator and a current source. Compared to op-amps, comparators suffer …
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Modeling, Analysis, and Design of Switched-Capacitor Battery Cell Balancers
Battery systems have become crucial components in many modern technological solutions. Battery balancers are among the most important parts of these systems because they play a significant role in the battery’s lifespan and performance. A novel capacitive-based balancer was designed and tested for …
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A hybrid switched-capacitor/inductor converter for small conversion ratios
… are made possible by adding a flying capacitor that reduces the voltage stresses on the switches and decreases the inductor size by reducing the volt-second across the inductor. The converter is implemented as an integrated circuit built in a 0.25[mu]m 5V CMOS process. Experimental …
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Comparator design and analysis for comparator-based switched-capacitor circuits
… of high gain, wide dynamic range op-amps for switched-capacitor circuits has become increasingly challenging with the migration of designs to scaled CMOS technologies. The reduced power supply voltages and the low intrinsic device gain in scaled technologies offset some of the benefits of the …
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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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Computer Analysis of Switched Capacitor Filters Including Sensitivity and Distortion Effects
In this dissertation both the underlying theory and the computational aspects of a general SC filter analysis program SCAPN are described. The analysis of a periodically time-varying SC network is reduced to the analysis of several time-invariant networks. Both time-domain and frequency-domain …
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A Two-Stage Piezoelectric Resonator and Switched Capacitor DC-DC Converter
… based on piezoelectric resonators (PRs) and capacitors as the main passive elements. In previous work, we have demonstrated that PRs have high efficiencies and power density capabilities operating as dc-dc voltage regulators, but that these advantages wane for high step down ratios. …
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