Fully Tunable GaAs MESFET OTA-C Integrator Suitable for High-precisio-n Continuous-time Filtering. - Pasqualino Visocchi; John T. Taylor; Andrew Betts; David Haigh (ISCAS, 1993)

A High-Precision, Fully Tunable OTA-C Second-Order Banpass Filter Implemented in GaAs MESFET Technology. - Pasqualino Visocchi; John T. Taylor; Richard Mason; Andrew Betts; David Haigh (ISCAS, 1994)

Design and evaluation of a high-precision, fully tunable OTA-C bandpass filter implemented in GaAs MESFET technology. - Pasqualino Visocchi; John T. Taylor; Richard Mason; Andrew Betts; David Haigh (IEEE J. Solid State Circuits, 1994)

A 3MPixel Low-Noise Flexible Architecture CMOS Image Sensor. - Jungwook Yang; Keith Fife; Lane Brooks; Charles G. Sodini; Andrew Betts; Pavan Mudunuru; Hae-Seung Lee (ISSCC, 2006)