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

This 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.


Published in:
International Journal of Circuit Theory and Applications
Year:
2015
Publisher:
Hoboken, Wiley
ISSN:
0098-9886
Keywords:
Laboratories:




 Record created 2015-08-30, last modified 2018-09-13

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