A unified asymmetric memristive diode-bridge emulator and hardware confirmation Fangyuan Li, Tianshi Wang, Mo Chen and Huagan Wu Eur. Phys. J. Spec. Top., 230 7-8 (2021) 1805-1811 Published online: 17 June 2021 DOI: 10.1140/epjs/s11734-021-00180-3