A Negative R-Assisted Amplifier on the Virtual Ground and Its Applications

Youngcheol Chae, Moon Hyung Jang, Changuk Lee, Sangwoo Lee, Seungwoo Song

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An active network with the property that the impedance on a terminal pair is negative is called as a negative impedance, and many active circuits, such as amplifiers, filters and oscillators, contain the negative impedance. In particular, a negative resistor (negative R) has been used since the days of the vacuum tube oscillators, in which the negative R compensates for resistive leakage of an inductor. In the late 1970s and early 1980s, significant research efforts were made to expand the bandwidth of amplifiers and apply them to integrated filters and oscillators [1-4]. Among these, an amplifier with a negative R on its virtual ground was proposed in [1] and described in [2-5]. The idea of using the negative R-assisted amplifier has been used in recent state-of-the-art works [6-19], as it turns out that the negative R compensates for the finite gain, bandwidth, noise and distortion of the amplifier. Despite many advantages, the negative R-assisted amplifier did not get the attention it deserves. The aim of this paper is, therefore, to reconsider some of these early concepts [1-5], and in particular to evaluate the benefits of negative R-assisted amplifiers in the light of recent advances [6-19]. The rest of the paper is organized as follows. First, the operation principle of fundamental building blocks with negative R such as inverting amplifier and integrator is described. Second, several negative-R assisted amplifiers in the signal chain are discussed. Third, the design benefit of continuoustime delta-sigma modulators (CTDSMs) with negative R-assisted integrators is evaluated. The negative R lmplementation is also discussed. Finally, an interesting option is described to proceed this concept.

Original languageEnglish
Title of host publication2021 IEEE Custom Integrated Circuits Conference, CICC 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728175812
DOIs
Publication statusPublished - 2021 Apr
Event2021 IEEE Custom Integrated Circuits Conference, CICC 2021 - Virtual, Austin, United States
Duration: 2021 Apr 252021 Apr 30

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2021-April
ISSN (Print)0886-5930

Conference

Conference2021 IEEE Custom Integrated Circuits Conference, CICC 2021
Country/TerritoryUnited States
CityVirtual, Austin
Period21/4/2521/4/30

Bibliographical note

Funding Information:
This work was supported in part by the MOTIE (Ministry of Trade, Industry & Energy) (project number 10080488) and KSRC (Korea Semiconductor Research Consortium) support program for the development of the future semiconductor device.

Funding Information:
This work was supported in part by the MOTIE (M inistry of Trade, Industry &Energy) (project number 10080488) and KSRC (Korea Sem iconductor Research Consortium) support program for the development of the future sem iconductor device.

Publisher Copyright:
© 2021 IEEE.

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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