Sapawi, R., D. Mohamad, D. Yusuf, S. Sahari, D. Salleh, N. Hazis, and S. Murad. “CMOS Power Amplifier Design Techniques for UWB Communication: A Review”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 2-10, Sept. 2017, pp. 1-8, https://jtec.utem.edu.my/jtec/article/view/2698.