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 45 for “"control circuit"”.
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Design and analysis of a modified power-split continuously variable transmission
… can be improved. For the CVPST, the branch control circuit that contains the CVT can be disengaged at the ring gear for a 1:1 overall transmission ratio, which will interrupt the power flow through the CVT. This could increase overall efficiency because the branch control circuit is no …
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CMOS digital pixel sensor array with time domain analogue to digital conversion
… and also prevents blooming. An on-chip control circuit generates the digital data that is distributed globally to the array. The control circuit compensates for the inverse relationship between the integration time and the photocurrent by adjusting the data clock timing. The period of …
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Control system design for a C-130 Ro-Ro sensor deployment platform
… engineers were asked to design the control circuit for the Sensor Pallet, providing the user with a user interface to control deployment of the mechanical arm and Sensor Pod. The mechanical arm should also be deployable in an automated process, controlled by a computerized system. …
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Automated corn kernel quality inspection using machine vision
… object position sensors, a strobe light, a control circuit, a video camera and a PC computer with image processing hardware and software.
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A high-level approach to test generation for VLSI circuits
… made use of the gate level representation of the circuit. This test generation problem is known to be NP-Complete for combinational circuits. A high level test generation approach has been designed on the basis of the branch and bound search procedure. This approach contains a data path test …
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The electrical characteristics of the direct current welding arc and the design and testing of a D.C. welding generator
… for welding and a basic excitation control circuit is employed to give the desired control of the output from the generator. The initial welds made are very unsatisfactory and attempts to improve the weldability by modifying the characteristics of the control circuit are …
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Power factor correction using a boost quasi-resonant converter
… to a single-phase power factor correction circuit. The known closed-form expressions are used to design the boost converter and the multiloop control circuit. The operating characteristics are simulated by using PSPICE and are experimentally verified. Considerations for a practical design …
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Design of DC-DC converters using Tunable Piezoelectric Transformers
… transformers (TPT) which provide an extra control terminal, used in this case, to regulate the output voltage. A detailed mathematical analysis is done on the electrical equivalent circuit of the TPT to understand the effect of control terminal loading on the circuit performance. Based on …
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Some design consideration of switching regulator using current-injected control
… constraints and the effects of various critical control circuit parameters are pinpointed and the analysis-based design guidelines are established in order to optimize the switching regulator performances. In addition, an external ramp slope is proposed to obtain the optimal performance and …
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Optimization of tunable silicon compatible microring filters
… demultiplexing in electronic-photonic integrated circuits for applications such as analog-to-digital converters (ADCs). For high quality signal transmission, the resonant frequency of the filter has to be held at certain value to allow minimum timing errors in the sampling of the signal. Thermal …
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Power management circuits for ultra-low power systems
Power management circuits perform a wide range of vital tasks for electronic systems including DC-DC conversion, energy harvesting, battery charging and protection as well as dynamic voltage scaling. The impact of the efficiency of the power management circuits is highly profound for ultra-low …
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Novel Method for Mach-Zehnder Interferometer Phase Stabilization
… simulated, and a low cost and simple prototype control circuit was constructed which successfully proved the feasibility of this stabilization method. Finally, the initial mathematical model was refined according to experimental observations. This novel stabilization method could be impactful to …
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Low-power Power Management Circuit Design for Small Scale Energy Harvesting Using Piezoelectric Cantilevers
… operation of a power conditioning and management circuit is a key design issue. In this research, we investigate the characteristics of piezoelectric cantilevers and requirements of power conditioning and management circuits. A two-stage conditioning circuit with a rectifier and a DC-DC converter …
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Design of high-density dc/dc converters
… experimental results are shown. A high-density control circuit for a 50 W forward ZVS-MRC is designed using an integrated controller. This circuit is implemented into the high-density power stage previously designed by Tabisz and Lee to attain an overall converter power density of above 80 …
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Design of a System to Investigate the Relationship Between Feedback and Delivery Medium for a Novel Motor Task
… data, with a program that also interfaces with a control circuit. The control circuit may transmit data through Bluetooth to a custom-built app on the tablet, which then provides augmented feedback with audio dialogue. Otherwise, the human coach is provided designed feedback from the laptop. An …
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Small-signal analysis of parallel power converters
… and design. Different forms of current-mode control and their applications to single and multiple modules are discussed. Detailed procedures are then developed for the design of a current-mode control circuit for single or multiple power converter modules. The applications of the design …
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A highly efficient low output voltage DC to DC converter
… efficiencies in excess of 87% (including control circuit consumption) were measured.
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Fast incremental unit propagation by unifying watched-literals and local repair
… of fields including diagnosis, autonomous control, circuit testing, and software verification. In these applications, satisfiability problem solvers are often used to solve a large number of problems that are essentially the same and only differ from each other by incremental alterations. …
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A built-in self-test PLA generator
… for nMOS PLAs) for CMOS PLAs and added the control circuit. Implementation of BPG was based on MPLA, a PLA generator. Tiles necessary for BIST PLAs were created and added to the existing PLA tiles. The source code of MPLA was modified in order to place proper tiles and generate layouts of …
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High frequency switching parallel processing topology for AC uninterruptible power supply
… switching topology. The main power circuit configuration is shown to describe the steady state behaviour of the system in both ac line supply and battery backup modes of operation. A stability analysis is developed to describe the system behaviour against the load variation and the …
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