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Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

2019

Electrical and Electronics

Theses/Dissertations

Low-cost

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Full-Text Articles in Engineering

Time-Difference Circuits: Methodology, Design, And Digital Realization, Shuo Li Oct 2019

Time-Difference Circuits: Methodology, Design, And Digital Realization, Shuo Li

Doctoral Dissertations

This thesis presents innovations for a special class of circuits called Time Difference (TD) circuits. We introduce a signal processing methodology with TD signals that alters the target signal from a magnitude perspective to time interval between two time events and systematically organizes the primary TD functions abstracted from existing TD circuits and systems. The TD circuits draw attention from a broad range of application fields. In addition, highly evolved complementary metal-oxide-semiconductor (CMOS) technology suffers from various problems related to voltage and current amplitude signal processing methods. Compared to traditional analog and digital circuits, TD circuits bring several compelling features ...


Ac/Dc Differential Bridge Based Solution-Electrode Interfacial Capacitance Biosensor, For Field-Deployable Real-Time And Low-Cost Detection Of Mclr In Drinking Water., Sara Neshani Jan 2019

Ac/Dc Differential Bridge Based Solution-Electrode Interfacial Capacitance Biosensor, For Field-Deployable Real-Time And Low-Cost Detection Of Mclr In Drinking Water., Sara Neshani

Graduate Theses and Dissertations

Microcystin-LR (MCLR, one of the most toxic and commonly found products of cyanobacteria in freshwater resources, threatens human health and the livestock. WHO has set a standard limit of 1 μg⁄l for the concentration of MCLR in drinking water. The lab-based, specialized water quality monitoring tests for this purpose are not only expensive but also slow and require sample preparation and transportation from distant sites. Therefore, there is a need for a handheld, field-deployable and low-cost biosensor to make frequent water quality monitoring easier.

Many field-deployable biosensors with applications in environmental monitoring and healthcare where concentrations of interest are ...