Integrated synchronous electric charge extraction system for piezoelectric energy harvesters. - Adrian Enriquez Aguayo; Oliver Paul; Tzeno Galchev (ISCAS, 2015)

Self-powered CMOS active rectifier suitable for low-voltage mechanical energy harvesters. - Abdalrahman Sayed Herbawi; Fabio Velarde; Oliver Paul; Tzeno Galchev (IEEE SENSORS, 2016)