Sigma delta feedback DAC architectures for high accuracy and extremely low charge transfer. - Ketan J. Pol; Hans Hegt; Sotir Ouzounov (ISCAS, 2013)

Limit cycle counting based smart background calibration of continuous time sigma delta ADCs. - Ketan J. Pol; Hans Hegt; Arthur H. M. van Roermund; Sotir Ouzounov (ISCAS, 2014)

A femto-ampere sensitive direct-interface current-input sigma delta ADC for amperometric bio-sensor signal acquisition. - Ketan J. Pol; Hans Hegt; Arthur H. M. van Roermund; Sotir Ouzounov (BioCAS, 2015)

A Background Calibration Technique Based on Limit Cycles for Reconfigurable Sigma Delta Modulators. - Ketan J. Pol; Sotir Ouzounov; Hans Hegt; Arthur H. M. van Roermund (IEEE J. Emerg. Sel. Topics Circuits Syst., 2015)