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Open AccessFeature PaperArticle

A New Low-Voltage Low-Power Dual-Mode VCII-Based SIMO Universal Filter

Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
Author to whom correspondence should be addressed.
Electronics 2019, 8(7), 765;
Received: 24 June 2019 / Revised: 3 July 2019 / Accepted: 4 July 2019 / Published: 9 July 2019
(This article belongs to the Special Issue Filter Design Solutions for RF systems)
In this paper, a new low-voltage low-power dual-mode universal filter is presented. The proposed circuit is implemented using inverting current buffer (I-CB) and second-generation voltage conveyors (VCIIs) as active building blocks and five resistors and three capacitors as passive elements. The circuit is in single-input multiple-output (SIMO) structure and can produce second-order high-pass (HP), band-pass (BP), low-pass (LP), all-pass (AP), and band-stop (BS) transfer functions. The outputs are available as voltage signals at low impedance Z ports of the VCII. The HP, BP, AP, and BS outputs are also produced in the form of current signals at high impedance X ports of the VCIIs. In addition, the AP and BS outputs are also available in inverting type. The proposed circuit enjoys a dual-mode operation and, based on the application, the input signal can be either current or voltage. It is worth mentioning that the proposed filter does not require any component matching constraint and all sensitivities are low, moreover it can be easily cascadable. The simulation results using 0.18 μm CMOS technology parameters at a supply voltage of ±0.9 V are provided to support the presented theory. View Full-Text
Keywords: current mode; universal filter; VCII; voltage conveyor; SIMO filter current mode; universal filter; VCII; voltage conveyor; SIMO filter
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Safari, L.; Barile, G.; Ferri, G.; Stornelli, V. A New Low-Voltage Low-Power Dual-Mode VCII-Based SIMO Universal Filter. Electronics 2019, 8, 765.

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