High Performance Digital-input Class-D Amplifier

Class-D amplifiers have gained popularity for their high-power efficiency, exceeding 90%. Among them, digital-input Class-D amplifiers stand out due to their superior integration and increased immunity to electromagnetic interference (EMI). This project introduces a high-performance digital-input Class-D amplifier, aiming for a dynamic range...

A Novel Neural Recording IC with Adaptive Gain Control for Wide-Dynamic Range Closed-Loop Neural Interfaces

Bidirectional neural recording ICs faces the challenge of simultaneous stimulation and recording. The recording IC should endure large stimulation artifacts while capturing weak neural signals excited by the stimuli. The stimulation artifacts can be as large as hundreds of millivolts, which can saturate the recording front end. Conventional...

An Ultrasound Receiver ASIC with Slow-time Feedback for Transcranial Doppler Imaging

Transcranial Doppler ultrasound imaging is a crucial tool for both clinical and research applications. Despite its significance, its utility is constrained by the dynamic range limitations of the receiver system. Traditional methods, relying on high-dynamic-range front-end amplifiers and high-resolution ADCs, are often inefficient. These methods...

Adding Bloom to High-Dynamic-Range Tone Mapping

We present a technique for enhancing high-dynamic-range tone mapping algorithms by adding the bloom effect to bright areas. Bloom is based on the fact that real-life lenses convolve light and make bright areas emit a glow. The algorithm takes a set of images with different exposures as input, and performs a tone mapping algorithm on these. It...

A 1-Mega Pixels HDR and UV Sensitive Image Sensor With Interleaved 14-bit 64Ms/s SAR ADC

This thesis presents a 1-Mega pixels high-dynamic range and UV sensitive image sensor in 0.18 µm technology with 14-bit interleaved 64Ms/s SAR ADC. It can achieve 64 fps and 101 dB dynamic range. The pixel array contains three kinds of pixel: UV pixel, visible pixel and low blue pixel. Those three kinds of pixel form a special 4×4 kernel to meet...

The Design of a Stitched, High-dynamic Range CMOS Particle Sensor

This thesis presents the design of a stitched, high-dynamic range particle sensor in 0.18 µm technology, which has three different configurations of 4096*4096 (4K), 8192*8192 (8K) and 12288*12288 (12K) pixels. It can be operated at 65 MHz with a target of 5 e- RMS noise and 92 dB dynamic range. The architecture of the whole sensor is explained...

Design of Front-End Receiver Electronics for 3D Trans-Esophageal Echocardiography

The motivation behind this thesis is that cardio-vascular diseases claim the highest number of lives each year globally. In order to enhance the accuracy in diagnosis, construction of 3D images of the heart is required. From these images, precise information can be obtained regarding the 3D anatomy of the heart and its functioning. Trans...

Design of high-resolution photodiode readout circuitry for a bio-implantable continuous glucose sensing chip

Glucose sensors are useful for monitoring and control of blood-sugar concentration for diabetic patients. There are many challenges in their wide-spread use and effectiveness in control of the disease. This work is a step towards achieving in vivo continuous long-term glucose monitoring using the optical near-infrared based glucose sensing...

The Desigh of a High Dynamic Range CMOS Image Sensor in 110nm Technology

This thesis presents the design of a dual-transfer-gate high dynamic range CMOS image sensor. Several methods that can be applied to extend the dynamic range have been developed. However, all of these solutions have undesired problems, such as nonlinearity response, higher dark current shot noise and discontinues signal-to-noise ratio. In this...

Pixel ADC Design for Hybrid CMOS Image Sensors

This thesis presents the design of a pixel level analog-to-digital converter (ADC) circuit for hybrid CMOS image sensors. There are several methods to increase the dynamic range of the sensor through the readout algorithm. The multiple sampling method can increase the dynamic range (DR) without a loss of signal-to-noise ratio (SNR). The idea is...