Analog Integrated Circuits and Signal Processing

, Volume 66, Issue 1, pp 139–141

On the Barkhausen and Nyquist stability criteria

Mixed Signal Letter

DOI: 10.1007/s10470-010-9506-4

Cite this article as:
von Wangenheim, L. Analog Integr Circ Sig Process (2011) 66: 139. doi:10.1007/s10470-010-9506-4


A recently published paper (Singh, Analog Integr Circuit Signal Process, 62:327–332, 2010) dealing with the relationship between the Barkhausen condition for oscillation and the well known Nyquist stability criterion for systems with feedback is highly appreciated. However, it seems to be necessary to place some comments on it. The circuit examples presented in the cited paper as well as the conclusions will be critically reviewed. Apparently, there is still no sufficient oscillation condition. Therefore, the necessity to complete the existing oscillation criterion with a sufficient condition is emphasized.


Barkhausen criterionCondition of oscillationFeedbackNyquist stability criterionOscillatorsStability

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.University of Applied Sciences BremenBremenGermany