An improvement of a piecewise curvature-corrected CMOS bandgap reference. - Ruhaifi Abdullah Zawawi; Othman Sidek; Wan Mohd Hafizi Wan Hassin; Mohamad Izat Amir Zulkipli; Nuha Rhaffor (IEICE Electron. Express, 2011)

A new curvature-corrected CMOS bandgap voltage reference. - Ruhaifi Abdullah Zawawi; Othman Sidek (IEICE Electron. Express, 2012)

A 1.6 ppm/°C bandgap voltage reference for an extended operating temperature range. - Ruhaifi Abdullah Zawawi; Tun Zainal Azni Zulkifli (IEICE Electron. Express, 2014)

A CMOS bandgap voltage reference with current-control circuits for the extended operating temperature range. - Ruhaifi Abdullah Zawawi; Nuha A. Rhaffor; Shukri Korakkottil Kunhi Mohd; Sofiyah Sal Hamid; Asrulnizam Bin Abd Manaf; Kazuaki Sawada (ISOCC, 2017)

A 3.3 V, 8.89 μA and 5.5 ppm/°C CMOS bandgap voltage reference for power telemetry in retinal prosthesis systems. - Ruhaifi Abdullah Zawawi; Jae-Kun Kim; Jong-Bum Park; Seong-Woo Kim (EMBC, 2018)

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)

A Nanopower EEG Low-Pass Filter Using Current-Sharing Vertical Differential Pairs. - Prajuab Pawarangkoon; Rafidah Ahmad; Ruhaifi Abdullah Zawawi; Asrulnizam Abd Manaf; Wanlop Surakampontorn; Surachoke Thanapitak (IEEE Trans. Very Large Scale Integr. Syst., 2025)