A 400nW single-inductor dual-input-tri-output DC-DC buck-boost converter with maximum power point tracking for indoor photovoltaic energy harvesting. - Kin Wai Roy Chew; Zhuochao Sun; Howard Tang; Liter Siek (ISSCC, 2013)

A 1.33 µW 8.02-ENOB 100 kS/s Successive Approximation ADC With Supply Reduction Technique for Implantable Retinal Prosthesis. - Howard Tang; Zhuochao Sun; Kin Wai Roy Chew; Liter Siek (IEEE Trans. Biomed. Circuits Syst., 2014)

A 0.42-V Input Boost dc-dc Converter With Pseudo-Digital Pulsewidth Modulation. - Zhuochao Sun; Kin Wai Roy Chew; Howard Tang; Guolei Yu; Liter Siek (IEEE Trans. Circuits Syst. II Express Briefs, 2014)

A 5.8 nW 9.1-ENOB 1-kS/s Local Asynchronous Successive Approximation Register ADC for Implantable Medical Device. - Howard Tang; Zhuochao Sun; Kin Wai Roy Chew; Liter Siek (IEEE Trans. Very Large Scale Integr. Syst., 2014)

A 400 nW Single-Inductor Dual-Input-Tri-Output DC-DC Buck-Boost Converter With Maximum Power Point Tracking for Indoor Photovoltaic Energy Harvesting. - Guolei Yu; Kin Wai Roy Chew; Zhuochao Sun; Howard Tang; Liter Siek (IEEE J. Solid State Circuits, 2015)