A High Speed DAC Architecture for Continuous Time Pipeline ADC

This thesis provides an investigation of the architecture and the design of the coarse DACs in continuous time pipeline (CTP) ADC to achieve high SFDR performance within a large bandwidth at sampling frequency of 4.8 GHz in TSMC 28nm technology.<br style="box-sizing: border-box"/> Mismatch errors of the coarse DACs in CTP ADC are very...

A Second-Order Element-Matched Sigma-Delta ADC for Ultrasound Imaging

Next-generation ultrasound probes will require in-probe digitization. In previous work, the transducer was used as the loop filter of a sigma-delta modulator to obtain a compact element-matched ADC. However, the performance of the previous design can be improved potentially. The aim of this project is to upgrade the element-matched first-order...

A power-efficient Delta-Sigma ADC with a passive input stage for audio applications

Several techniques have been proposed to reduce the swing at the input stage of a CTDSM. One of these is using a simple passive RC input stage. In prior works, this increased in-band quantization noise. In this paper, we use positive feedback to realize complex-conjugate poles with a passive input stage, obtaining the same noise-shaping as an...

Electronic markers for geological research: Tag Design

In this thesis, the implementation of a passive, chipless, frequency coded Radio-Frequency Identification (RFID) tag for bedload transport studies is proposed. The proposed tag will be deployed in the semi-arid Río Colorado river, Bolivia with the aim to develop quantitative sediment transport models that relate transport to grain size. The...

A Multi-Path Sigma Delta ADC: For use in battery management systems

This thesis presents the design and testing of a multi-path analog-to-digital converter for current sensing in battery management systems. The specifications of this converter are (1) continuously integrate and convert a signal at 125 Hz with a resolution of 20 bit and (2) perform on demand fast conversions of 20 μs at a resolution of 14 bit....

A Capacitive Pressure Sensor Interface

A transceiver ASIC for a single-cable 64-element intra-vascular ultrasound probe

This work presents an ASIC designed to be integrated on the tip of an intra-vascular ultrasound catheter, capable of interfacing 64 ultrasonic transducer elements to an imaging system using only one micro-coaxial cable.<br/>A prototype chip has been taped out that can be used to transmit acoustic waves using a small-area transmit switch. The...