Design Methodology for Common-Mode Stability of OTA-based Gyrators

Ghamari, SaeedTasselli, GabrieleBotteron, CyrilFarine, Pierre-André2015-08-302015-08-302015-08-30201610.1002/cta.2154https://infoscience.epfl.ch/handle/20.500.14299/117471WOS:000376206000013This paper presents a design methodology for common-mode (CM) stability of operational transconductance ampliﬁer (OTA)-based gyrators. The topology of gm−C active inductors is brieﬂy reviewed. Subsequently, a comprehensive mathematical analysis on the CM stability of OTA-based gyrators is presented. Sufﬁcient requirements for the gyrator’s CM stability, that easily can be considered during the design process of common-mode feedback (CMFB) ampliﬁers, are deﬁned. Based on these stability requirements, a design methodology and a design procedure are proposed. Finally, in order to validate the proposed procedure, a resonator with 20 MHz resonance frequency and a quality factor of 20 is fabricated with UMC 180-nm CMOS technology and its CM stability is examined.Common-mode stabilityGm-C ﬁltersGyratoroperational transconductance ampliﬁer (OTA)ResonatorDesign Methodology for Common-Mode Stability of OTA-based Gyratorstext::journal::journal article::research article