A 32×32 50ps resolution 10 bit time to digital converter array in 130nm CMOS for time correlated imaging. - Justin A. Richardson; Richard Walker 004; Lindsay Grant; David Stoppa; Fausto Borghetti; Edoardo Charbon; Marek Gersbach; Robert K. Henderson (CICC, 2009)

A parallel 32×32 time-to-digital converter array fabricated in a 130 nm imaging CMOS technology. - Marek Gersbach; Yuki Maruyama; E. Labonne; J. Richardson; Richard Walker 004; Lindsay Grant; Robert K. Henderson; Fausto Borghetti; David Stoppa; Edoardo Charbon (ESSCIRC, 2009)

A 32x32-pixel array with in-pixel photon counting and arrival time measurement in the analog domain. - David Stoppa; Fausto Borghetti; Justin A. Richardson; Richard Walker 004; Lindsay Grant; Robert K. Henderson; Marek Gersbach; Edoardo Charbon (ESSCIRC, 2009)

FPGA Implementation of a Video-rate Fluorescence Lifetime Imaging System with a 32×32 CMOS Single-photon Avalanche Diode Array. - Day-Uei Li; Richard Walker 004; Justin A. Richardson; Bruce Rae; Alex Buts; David Renshaw 001; Robert K. Henderson (ISCAS, 2009)

A 160×128 single-photon image sensor with on-pixel 55ps 10b time-to-digital converter. - Chockalingam Veerappan; Justin A. Richardson; Richard Walker 004; Day-Uei Li; Matthew W. Fishburn; Yuki Maruyama; David Stoppa; Fausto Borghetti; Marek Gersbach; Robert K. Henderson; Edoardo Charbon (ISSCC, 2011)

A 128×96 pixel event-driven phase-domain ΔΣ-based fully digital 3D camera in 0.13μm CMOS imaging technology. - Richard J. Walker; Justin A. Richardson; Robert K. Henderson (ISSCC, 2011)

A gate Modulated avalanche bipolar transistor in 130nm CMOS technology. - Robert K. Henderson; Eric A. G. Webster; Richard Walker 004 (ESSDERC, 2012)

A silicon photomultiplier with >30% detection efficiency from 450-750nm and 11.6μm pitch NMOS-only pixel with 21.6% fill factor in 130nm CMOS. - Eric A. G. Webster; Richard J. Walker; Robert K. Henderson; Lindsay Grant (ESSDERC, 2012)

A Time-Resolved, Low-Noise Single-Photon Image Sensor Fabricated in Deep-Submicron CMOS Technology. - Marek Gersbach; Yuki Maruyama; Rahmadi Trimananda; Matthew W. Fishburn; David Stoppa; Justin A. Richardson; Richard Walker 004; Robert K. Henderson; Edoardo Charbon (IEEE J. Solid State Circuits, 2012)

Time-Domain Fluorescence Lifetime Imaging Techniques Suitable for Solid-State Imaging Sensor Arrays. - David Day-Uei Li; Simon Ameer-Beg; Jochen Arlt; David Tyndall; Richard Walker 004; Daniel R. Matthews; Viput Visitkul; Justin A. Richardson; Robert K. Henderson (Sensors, 2012)

An 8×16-pixel 92kSPAD time-resolved sensor with on-pixel 64ps 12b TDC and 100MS/s real-time energy histogramming in 0.13µm CIS technology for PET/MRI applications. - Leo Huf Campos Braga; Leonardo Gasparini; Lindsay Grant; Robert K. Henderson; Nicola Massari; Matteo Perenzoni; David Stoppa; Richard Walker 004 (ISSCC, 2013)

A 256 × 8 SPAD line sensor for time resolved fluorescence and raman sensing. - Nikola Krstajic; Richard Walker 004; James Levitt; Simon P. Poland; David Day-Uei Li; Simon Ameer-Beg; Robert K. Henderson (ESSCIRC, 2014)

A Fully Digital 8 × 16 SiPM Array for PET Applications With Per-Pixel TDCs and Real-Time Energy Output. - Leo Huf Campos Braga; Leonardo Gasparini; Lindsay Grant; Robert K. Henderson; Nicola Massari; Matteo Perenzoni; David Stoppa; Richard Walker 004 (IEEE J. Solid State Circuits, 2014)

A 500Mb/s -46.1dBm CMOS SPAD Receiver for Laser Diode Visible-Light Communications. - John Kosman; Oscar Almer; Tarek Al Abbas; Neale A. W. Dutton; Richard J. Walker; Stefan Videv; Kevin Moore; Harald Haas; Robert K. Henderson (ISSCC, 2019)

A CMOS SPAD Line Sensor With Per-Pixel Histogramming TDC for Time-Resolved Multispectral Imaging. - Ahmet T. Erdogan; Richard Walker 004; Neil Finlayson; Nikola Krstajic; Gareth O. S. Williams; John M. Girkin; Robert K. Henderson (IEEE J. Solid State Circuits, 2019)