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Open AccessFeature PaperArticle

A New Rail-to-Rail Second Generation Voltage Conveyor

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(11), 1292;
Received: 2 October 2019 / Revised: 27 October 2019 / Accepted: 4 November 2019 / Published: 5 November 2019
(This article belongs to the Section Microelectronics and Optoelectronics)
In this paper, a novel low voltage low power CMOS second generation voltage conveyor (VCII) with an improved voltage range at both the X and Z terminals is presented. The proposed VCII is formed by a current buffer based on a class AB regulated common-gate stage and a modified rail-to-rail voltage buffer. Spice simulation results using LFoundry 0.15 μm low-Vth CMOS technology with a ±0.9 V supply voltage are provided to demonstrate the validity of the designed circuit. Thanks to the class AB behavior, from a bias current of 10 µA, the proposed VCII is capable of driving 0.5 mA on the X terminal, with a total power consumption of 120 µW. The allowed voltage swing on the Z terminal is at least equal to ±0.83 V, while on the X terminals it is ±0.72 V. Both DC and AC voltage and current gains are provided, and time domain simulations, where the voltage conveyor is used as a transimpedance amplifier (TIA), are also presented. A final table that summarizes the main features of the circuit, comparing them with the literature, is also given.
Keywords: low voltage; low power; voltage conveyor; VCII; rail to rail low voltage; low power; voltage conveyor; VCII; rail to rail
MDPI and ACS Style

Barile, G.; Stornelli, V.; Ferri, G.; Safari, L.; D’Amico, E. A New Rail-to-Rail Second Generation Voltage Conveyor. Electronics 2019, 8, 1292.

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