Analysis of 'Switched Biased' random telegraph signals in MOSFETs


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Kolhatkar, J.S. and Salm, C. and Wallinga, H. (2002) Analysis of 'Switched Biased' random telegraph signals in MOSFETs. In: Proceedings of the 5th annual workshop on Semiconductors Advances for Future Electronics SAFE 2002, 27-28 November 2002, Veldhoven, The Netherlands.

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Abstract:With decreasing device dimensions of MOSFETs, the nature of the low-frequency noise spectrum is a Lorentzian. This type of spectrum is due to Random Telegraph Signals (RTS), whose origin can be attributed to the random trapping and de-trapping of mobile charge carriers in the channel in traps located at the Si- SiO2 interface or in the oxide. The low-frequency noise
decreases, if the transistors are switched "off" periodically (switched biased conditions). In this work, we have studied both p-MOS and n-MOS devices. The small devices (W/L=10:0.3) have a few trapping states, which is proven by the Lorentzian nature of the power spectrum. The RTS were measured under both; constant biased and switched biased conditions. A clear change in the RTS parameters;the mean capture time (?c) and the mean emission time (?e), under switched biased conditions, has been observed, as compared to the values in the constant bias case.
Item Type:Conference or Workshop Item
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/67761
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