Latest
22 June 2023Self-Powered Ambient Light Sensor Using Energy Harvesting Pixels and Zero Power Communication - IISW 2023
Benjamin Sarachi, Angus Cook, Jeffrey M. Raynor, Ilina Todorova, Stuart Ball, Filip Kaklin, Joe MacDougall, Sergio M. Aparicio, Robert K. Henderson
As CMOS technology improves, more efficient devices can be created achieving functionality with ever decreasing power budgets. This has moved to the point where some devices are so low power that they are able to harvest what they require from their surroundings. These energy harvesting sensors can be implemented in...
15 November 2022High Voltage Generation Using Reconfigurable Photodiodes in Pixel Array - Patent Granted
Filip Kaklin, Jeffrey M. Raynor
An imaging sensor includes a pixel array containing photodiodes, the photodiodes being isolated from one another by full thickness deep trench isolations. Row control circuitry controls which rows of the pixel array operate in an imaging mode and which rows of the pixel array operate in an energy harvesting mode,...
7 February 2021Energy Harvesting Pixel at the IEEE Sensors Keynote by Albert Theuwissen
Excited to see the work I presented at IISW 2019 making a brief appearance in Albert Theuwissen’s keynote at the 2020 IEEE Sensors conference. Video starts at 50:07.
26 January 2021Time Domain Discrete Transform Computation - Patent Granted
In accordance with embodiments, a first counter of a plurality of counters of an apparatus receives a plurality of pulse width signals in the time domain. The first counter generates a first increment signal in the time domain from the plurality of pulse width signals based on a first row...
12 January 2021Reverse Body Biasing of a Transistor Using a Photovoltaic Source - Patent Granted
A metal oxide semiconductor (MOS) transistor has a source terminal, a drain terminal, a gate terminal and a body terminal. The source terminal is connected to receive a supply voltage and the body terminal is connected to receive a reverse body bias voltage. A photovoltaic circuit has a first terminal...
13 November 2020Simple Boids
A simple implementation of boids using javascript and rendering to an HTML canvas.
2 June 2020Zero Power Sensors - Patent Granted
Jeffrey M. Raynor, Laurence Stark, Filip Kaklin
An integrated circuit includes a substrate and at least one photo-voltaic cell implemented on the substrate. The at least one photo-voltaic cell is configured to generate a supply voltage. Circuitry is implemented on the substrate. The circuitry is powered by the supply voltage. The at least one photo-voltaic cell can...
1 September 2019Energy Harvesting Pixel Array with Deep Trench Isolated Diodes for Self-Powered Imaging - IISW 2019
Filip Kaklin, Jeffrey M. Raynor, Robert K. Henderson
An array of pixels with dual functionality is implemented in a deep trench isolation (DTI), backside illuminated (BSI) process. Full thickness isolation separates the diode from the readout and reconfiguration transistors to make a 4T pixel. Each row of the array can operate independently in imaging mode (IM) or energy...
28 July 2019Shockley-Queisser Limit Calculator
A Jupyter notebook which walks through the calculation of the famous Shockley-Queisser Limit - the maximum theoretical efficiency of a photovoltaic converter.
2 December 2018High Voltage Generation Using Deep Trench Isolated Photodiodes in a Back Side Illuminated Process - IEDM 2018
Filip Kaklin, Jeffrey M. Raynor, Robert K. Henderson
We demonstrate passive high voltage generation using photodiodes biased in the photovoltaic region of operation. The photodiodes are integrated in a 90nm back side illuminated (BSI) deep trench isolation (DTI) capable imaging process technology. Four equal area, DTI separated arrays of photodiodes are implemented on a single die and connected...
19 March 20183D Printed Hand Prosthetic Prototype
Over the last few months I’ve been involved in a student society project with the ambitious goal of designing and fabricating a hand prosthetic. Here’s the first time we got the prototype to grip anything.
11 March 2018Distances Between Ports
An exercise in using regular expressions and making a simple dataset.