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 33 for “"Analog front end"”.
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Linear Analog Front -End Circuits for Fiber -Optic Communication Systems
… and supply voltage requirements. Also, an analog multiplexer provides a wide gain tunability and enhanced linearity. The VGA achieves tunable gain from 2.43 dB to 44.37 dB while being process insensitive; a worst case spurious free dynamic range of 26.46 dB with an output swing of 1.4 Vpp, …
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A Power Efficient Analog Front End for Continuous Ultrasound Imaging of the Bladder
… image. We combine these concepts into a single Analog Front End (AFE) chip that can capture images in a power efficient manner.
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Novel Sensing Approaches towards Ultimate MEMS Sensors
… consumption of MEMS sensors is attributed to the analog front end needed for reading, processing, and analog to digital conversion of the sensor output, which is typically responsible for most to all the power consumption of the whole sensor. The proposed effort in this dissertation aims at …
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MULTI-CHANNEL CDMA-LIKE CAPACITIVE SENSOR INTERFACE CIRCUITS
… 16 capacitive sensors separately at the receiver end. This potentially leads to 16 times smaller data throughput for efficient wireless data transmission compared to 16-channel time-interleave counterpart. The sharing of analog front-end and quantization block also helps achieving good power and …
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Ultra-wideband Narrowband Interference Cancellation and Channel Modeling for Communications
… for large scale modeling channel frequency dependence is investigated in order to justify the application of traditional narrowband path loss models to UWB signals. Average delay statistics and their distributions are also presented for small scale channel modeling. The thesis also investigates …
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A High-Speed and Low-Noise Nanopore Amplifier and Event Detector
… and semiconductor signal processing. The key analog front-end components of such an ASIC are described herein. In particular, the design of a 3-MHz 130-nm CMOS front-end with reduced area, 2× reduction in power, and 25% noise improvement compare with state of-the-art designs.
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Interface circuits for readout and control of a micro-hemispherical resonating gyroscope
… on custom printed circuit boards for both the analog front-end and analog back-end, along with a custom on-board vacuum chamber and chassis to house the μHSR and interface electronics. Finally the performance of the rate mode gyroscope interface was characterized, showing a linear scale factor …
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Design of High-Resolution SAR ADC for Detection of Sub-Cortical Neuron Action Potentials for BMI Applications
… successive approximation register (SAR) analog-to-digital converter (ADC) tailored for sub-cortical neural signal detection. To optimize dynamic range and reduce power consumption, a novel adaptive zoom-and-tracking architecture is introduced, enabling the ADC to dynamically adjust its …
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Capacitive displacement sensing for the Nanogate
… for the Nanogate involved the design of an analog front-end to convert capacitance to voltage and a custom high precision data acquisition system to digitize the output. The measured capacitance is converted back to absolute displacement by calibration with a Michelson interferometer-based …
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A non-coherent ultra-wideband receiver : algorithms and digital implementation
… In the final system, a radio frequency and an analog front-end interface with the FPGA, resulting in a complete radio receiver.
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0.3V biopotential sensor interface for stress monitoring
… lifetime. Exploiting low-voltage techniques in analog design can enable further power savings, which has not been explored much. However, for conventional analog-front-end (AFE) topologies, voltage scaling could potentially bring several limitations to the important performance metrics such as …
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General Interference Suppression Technique For Diversity Wireless Rece
… wireless receivers. The technique simplifies the analog front-end by eliminating the anti-aliasing filters and relaxing the requirements for IF bandpass filters and A/D converters. Like MIMO systems, multiple antenna elements are used for increased frequency reuse. The suppression of both image …
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Integrated Analog Readout Array and Digital Backend for Mobile DNA Sequencing
… for implementing low-cost, integrated analog front-end arrays and application-specific accelerated digital back-end systems. This thesis presents three iterative versions of a digital readout integrated circuit (DROIC), each enhancing throughput density through architectural and …
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Hand Pattern Recognition Using Smart Band
… hand motions. The EMG signal is passed through analog front-end module for noise filtering and signal amplification. An ARM Cortex processor converts the analog EMG and accelerometer signal into digital and transmits to a PC via Bluetooth protocol. On the receiver section, the raw EMG and …
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Energy scalable systems for 2D and 3D low-power ultrasound beamforming
… presented. Power-performance tradeoffs for the analog front-end, analog-to-digital converter, and digital beamformer are analyzed individually and then combined to account for the performance dependency between the functional components. These considerations inform a recommendation on design …
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Analysis of antenna beamforming architectures for wireless communications
… Thesis presents a comparative analysis of analog, digital and hybrid beamforming architectures for Multiple-Input Multiple-Output (MIMO) systems in Fifth-generation (5G) and future Sixth-generation (6G) networks. The demand for high data rates and massive connectivity, positions spatial …
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An AFE based embedded system for physiological computing
… of such systems entails discrete sensors and analog sub-systems known as the analog front end (AFE) for biosignal acquisition, conditioning, and vital bridging function. Being discrete and analog, signal processing is limited. Besides, with large form factor, component counts and power …
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A low-cost, handheld potentiostat device capable of high-resolution measurements and IOT connectivity
… main Microcontroller (MCU) and an AD5941 as the Analog Front End (AFE) device, enabling precise control and measurement in a small form factor. Wireless communication is facilitated via Bluetooth Low Energy (BLE), allowing the device to be controlled using a mobile application that supports …
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Amplifier and data converter techniques for low power sensor interfaces
… applications. This thesis explores both analog and algorithmic energy-saving techniques in the sensor interface signal chain. First, a data-dependent successive-approximation algorithm is developed and is demonstrated in a low-power analog-to-digital converter (ADC) implementation. When …
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Wireless tools for neuromodulation
… device operation consumes less than 4 mW. The analog front end has a bandwidth of 0.7 Hz - 1 kHz and a gain of 60 dB, and the constant current driver provides biphasic electrical stimulation. For use with optogenetics, the deep brain optical stimulation module provides 27 mW/mm2 of blue light …
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