Analysis of design specification for digital polar RF transmitter at system and architectural level. - Junqing Guan; Ahmed Farouk Aref; Renato Negra (RWS, 2012)

2.6 Class-0: A highly linear class of power amplifiers in 0.13μm CMOS for WCDMA/LTE applications. - Ahmed Farouk Aref; Renato Negra; Muhammad Abdullah Khan (ISSCC, 2015)

Highly linear and reliable low band class-O RF power amplifier in 130 nm CMOS technology for 4G LTE applications. - Muhammad Abdullah Khan; Ahmed Farouk Aref; Muh-Dey Wei; Renato Negra (NORCAS, 2015)

A Study of the Impact of Delay Mismatch on Linearity of Outphasing Transmitters. - Ahmed Farouk Aref; Thomas M. Hone; Renato Negra (IEEE Trans. Circuits Syst. I Regul. Pap., 2015)

1.5-3.3 GHz, 0.0077 mm2, 7 mW All-Digital Delay-Locked Loop With Dead-Zone Free Phase Detector in 0.13 µm CMOS. - Erkan Bayram; Ahmed Farouk Aref; Mohamed Saeed Elsayed; Renato Negra (IEEE Trans. Circuits Syst. I Regul. Pap., 2018)