A 0.4-μm 3.3-V 1T1C 4-Mb nonvolatile ferroelectric RAM with fixed bitline reference voltage scheme and data protection circuit. - Byung-Gil Jeon; Mun-Kyu Choi; Yoonjong Song; Seung-Kyu Oh; Yeonbae Chung; Kang-Deog Suh; Kinam Kim (IEEE J. Solid State Circuits, 2000)