Open AccessDesign of odd n th‐order elliptic high‐pass filters employing OTRAs
Author(s) -
Chang ChunMing,
Tu ShuHui,
Swamy M.N.S.,
Soliman Ahmed M.
Publication year - 2019
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
ISSN - 1751-8598
DOI - 10.1049/iet-cds.2018.5070
Subject(s) - resistor , realisation , filter (signal processing) , spice , order (exchange) , mathematics , low pass filter , amplifier , amplitude , mathematical analysis , computer science , physics , electronic engineering , electrical engineering , telecommunications , engineering , bandwidth (computing) , quantum mechanics , voltage , economics , finance
Two new analytical synthesis methods are proposed for synthesising an n th odd‐order elliptic high‐pass (HP) filter using operational trans‐resistance amplifiers (OTRAs). The analytical synthesis scheme is based on the assumption of infinite trans‐resistance R m for the OTRA. The H‐spice simulations of the realised elliptic third‐order HP filters show that the realisation using less number of OTRAs has a performance better than that which uses more number of OTRAs, as is to be expected in view of the assumption that R m is infinite, when in fact it is finite in practice. However, it is shown that by slightly adjusting a single resistor, the amplitude–frequency response can be made close to the theoretical response.