TY - JOUR AU - Jitender, Jitender AU - MOHAN, Jitendra AU - CHATURVEDI, Bhartendu PY - 2021/07/14 Y2 - 2024/03/29 TI - CMOS Realizable and Highly Cascadable Structures of First-Order All-Pass Filters JF - Walailak Journal of Science and Technology (WJST) JA - Walailak J Sci & Tech VL - 18 IS - 14 SE - Research Article DO - 10.48048/wjst.2021.21451 UR - https://wjst.wu.ac.th/index.php/wjst/article/view/21451 SP - Article 21451 (19 pages) AB - <p>Two novel resistorless structures of a first-order voltage-mode all-pass filter are presented in the paper. Both the structures employ a fully differential second-generation current conveyor (FDCCII) as the primary active element, in addition to an active resistor. A grounded capacitor is the only passive component used in both the structures. In both the structures, CMOS realization of FDCCII is utilized; hence, these structures are CMOS compatible. Some of the other highly demanded features possessed by the presented all-pass structures are: a simple circuit topology, electronic tunability, high input impedance, constraint-free operation in terms of passive component matching, and low sensitivity figures. The theoretical performances under ideal and non-ideal scenarios are presented in detail. Furthermore, the proposed idea is extended to an N<sup>th</sup>-order voltage-mode all-pass filter and a quadrature oscillator to explore some of the possible applications. PSPICE simulation results verify the theoretical claims of the presented all-pass filters.</p><p><strong>HIGHLIGHTS</strong></p><ul><li>Two novel resistorless structures of first-order all-pass filters based on fully differential second-generation current conveyor are presented</li><li>Performance of the proposed structures are thoroughly described in ideal and non-ideal scenarios</li><li>Theoretically described details of the proposed structures are verified by carrying simulations on PSPICE using 180 nm CMOS technology</li><li>An N<sup>th</sup>-order all-pass filter and a quadrature oscillator are also presented as applications</li></ul><p><strong>GRAPHICAL ABSTRACT<img src="https://wjst.wu.ac.th/public/site/images/admin/graphical-abstract.png" alt="" width="1349" height="694"><br></strong></p> ER -