Analytical synthesis of elliptic voltage-mode even/odd-nth-order filter structures using DDCCs, FDCCIIs, and grounded capacitors and resistors

• Published in: IET circuits, devices & systems devices & systems, 2019-05, Vol.13 (3), p.279-291
• Main Authors: Chang, Chun-Ming, Tu, Shu-Hui, Srikanta Swamy, M.N, Soliman, Ahmed M
• Format: Article
• Language: English
• Subjects: all-pass filters; analytical synthesis; band-pass filters; band-stop filters; Butterworth filters; Capacitors; Chebyshev approximation; Chebyshev filters; Circuits; Current conveyors; Electric potential; elliptic voltage-mode even/odd- nth-order filter structures; FDCCII; finite order; fourth-order low-pass; high-pass filters; low-pass filters; Research Article; Resistors; Synthesis; third-order low-pass; Voltage
• ISSN: 1751-858X; 1751-8598; 1751-8598
• DOI: 10.1049/iet-cds.2018.5172

Despite the recent publication of the analytical synthesis of voltage-mode even/odd-nth-order differential difference current conveyor (DDCC) and fully differential current conveyor II (FDCCII)-grounded resistor and capacitor universal Butterworth/Chebyshev filter structures, an elliptic voltage-mode even/odd-nth-order DDCC and FDCCII-based filter structure is yet to be presented in the literature. Under the restriction of a finite order, the elliptic filter is better at meeting the stringent cut-off rate of a very narrow transition band as compared to other kinds of filters, thus making the synthesis of such an elliptic filter to be extremely useful. In this study, one even-nth-order and two odd-nth-order elliptic filter structures are analytically synthesised using DDCCs and FDCCIIs. The feasibility of such structures is validated through H-spice simulations on the proposed elliptic third-order low-pass and elliptic fourth-order low-pass, high-pass, band-pass, and band-reject filters.