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 6 of 6 for “"ZCD"”.
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Study on Zero Crossing Detection in CRM Totem-pole PFC Converter
… high efficiency. Zero-crossing detection (ZCD) of inductor current is important for CRM/TCM operation. The ZCD signal helps synchronize the gate signals and turn off the synchronous switch at the appropriate current to achieve ZVS. A sensing resistor is typically used in conjunction with an …
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A Method to Improve Cartilage Integration
… is the presence of a zone of chondrocyte death (ZCD) that is generated upon osteochondral graft harvest, which can extend up to 400 μm into the cartilaginous portion of the graft. In order for cartilage integration to occur, chondrocytes must be present at the graft periphery; however chondrocyte …
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Time domain chromatic dispersion measurements in single mode optical fibers
… dispersion and the zero chromatic dispersion (ZCD) wavelength of the fiber. Time domain dispersion measurements find the group delay directly, eliminating the need for a vector voltmeter and the added phase calibration and group delay calculations needed in most frequency (phase) domain …
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High performance zero-crossing based pipelined analog-to-digtal converters
… ADCs are replaced with zero-crossing detectors(ZCD). Without the closed-loop feedback provided by the op-amp, a new set of design constraints for Zero-Crossing Based Circuits (ZCBC) is explored.
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Active Power Decoupling (APD) Converter for PV Microinverter Applications
… that does not rely on zero-crossing detection (ZCD) is proposed to implement closed-loop CRM modulation. In addition, advanced control technologies, including double sampling-based average current control, current observer-based reduced sensor control, and sensorless predictive control, are …
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Energy Harvesting IC Design for an Electromagnetic Generator Based on the Split Capacitor Approach
The proposed energy harvesting system intends to harvest vibrational energy via an electromagnetic generator (EMG). The proposed circuit intends to extract maximum power from the EMG by utilizing the maximum power transfer theorem which states that maximum power is transferred to the load when the …