A Fully-Printed Self-Biased Polymeric Audio Amplifier for Driving Fully-Printed Piezoelectric Loudspeakers. - Bahman Kheradmand Boroujeni; Georg Cornelius Schmidt; Daniel Höft; Maxi Bellmann; Katherina Haase; Koichi Ishida; Reza Shabanpour; Tilo Meister; Corrado Carta; Pol Ghesquière; Arved C. Hübler; Frank Ellinger (IEEE Trans. Circuits Syst. I Regul. Pap., 2016)