Wadhwa, Nishtha, Pydi Ganga Bahubalindruni, Kamal Chapagai, Joao Goes, Sujay Deb, and Pedro Barquinha. "Sixth?order differential Sallen?and?Key switched capacitor LPF using a?IGZO TFTs." Journal: International Jounal of Circuit Theory and Applications, Wiley.10 (2018): 1-11.