List of Articles Ahmad Omrani Article 1 - Design and Implementation a Single-Phase UPS Based on Microcontroller with AVR at Input and Full-Bridge Inverter at Output for Improving Sinusoidal Output Voltage 20.1001.1.25887327.2021.5.4.4.9 Ahmad Omrani Majid Dehghani Mohamad Reza Yousefi Signal Processing and Renewable Energy , Issue 5 , Year , Autumn 2021