15-nW Biopotential LPFs in 0.35-µm CMOS Using Subthreshold-Source-Follower Biquads With and Without Gain Compensation.
Tan-Tan ZhangPui-In MakMang I VaiPeng Un MakMan-Kay LawSio-Hang PunFeng WanRui Paulo MartinsPublished in: IEEE Trans. Biomed. Circuits Syst. (2013)