Howard Tang, Zhuochao Sun, Kin Wai Roy Chew, Liter Siek: A 1.33 µW 8.02-ENOB 100 kS/s Successive Approximation ADC With Supply Reduction Technique for Implantable Retinal Prosthesis. IEEE Trans. Biomed. Circuits Syst. 8(6): 844-856 (2014)