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Open AccessArticle

A Novel General Purpose Combined DFVF/VCII Based Biomedical Amplifier

Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
Author to whom correspondence should be addressed.
Electronics 2020, 9(2), 331;
Received: 2 January 2020 / Revised: 7 February 2020 / Accepted: 11 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Low-Voltage Integrated Circuits Design and Application)
We here present a 0.15 µm CMOS high input impedance and low noise AC coupled flipped voltage follower-based amplifier for high integration level in integrated circuits in a wide range of sensing applications. With such a circuit, it is possible to achieve a high level of integration, thanks to the absence of passive resistors, and also to implement a very high input impedance without capacitive feedback thanks to bootstrap operation, thus offering a very low high-pass cutoff frequency. Simulated results with a proven and well modeled standard technology show a whole circuit input-referred noise of 5.4 µVrms. The bias voltage is ±0.6 V with a total power consumption of the single amplifier of 20 µW. The very low circuit complexity allows a very low estimated reduced area occupation giving, as a general example, the possibility of integrating an array of up to thousands of channels for biomedical applications. Detailed simulation results, PVT analysis and comparison tables are also presented in the paper.
Keywords: CMOS technology; High input Impedance; DFVF; VCII. CMOS technology; High input Impedance; DFVF; VCII.
MDPI and ACS Style

Stornelli, V.; Barile, G.; Leoni, A. A Novel General Purpose Combined DFVF/VCII Based Biomedical Amplifier. Electronics 2020, 9, 331.

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