Noise source modeling for cyclostationary noise analysis in large-signal device operation

• Published in: IEEE transactions on electron devices Vol. 49; no. 9; pp. 1640 - 1647
• Main Authors: Bonani, F., Guerrieri, S.D., Ghione, G.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-09-2002; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplitude modulation; Current density; Devices; Filtering; Filtration; Fluctuation; Gaussian; Gaussian noise; Modulation; Noise; Random noise; Semiconductor device modeling; Semiconductor device noise; Superconducting microwave devices; White noise
• ISSN: 0018-9383; 1557-9646
• DOI: 10.1109/TED.2002.802638

Starting from the analysis of fundamental noise sources in large-signal (LS) periodic operation, a system theory approach is proposed for the modeling of colored noise sources in devices and circuits driven in LS conditions. According to this interpretation, colored sources are generated by low-pass filtering and amplitude modulation of a white unit Gaussian process. The order of the modulation and filtering steps leads to two different (albeit coincident in small-signal conditions) LS noise sources. Through the analysis of GR noise in physics-based device simulation, it is shown that only one modulation scheme (based on low-pass filtering followed by amplitude modulation) is consistent with the fundamental approach. This result also applies to 1/f noise mechanisms when 1/f fluctuations derive from population fluctuations.