A 38.4 nW, 1.2 V, 250-Hz, 2nd-Order gm - C LPF With Degenerative SCP Transconductors Achieving 800-mVPP Input Range and 82.1- μVrms IRN for ECG Acquisition. - Surachoke Thanapitak; Prajuab Pawarangkoon; Wanlop Surakampontorn; Rafidah Ahmad; Ruhaifi Abdullah Zawawi; Asrulnizam Bin Abd Manaf; Suriya Adirek; Chaiyan Chanapromma (IEEE Trans. Circuits Syst. II Express Briefs, 2025)