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Paper Information

Journal:   INTERNATIONAL JOURNAL OF ENGINEERING   JANUARY 2010 , Volume 23 , Number 1 (TRANSACTIONS A: BASICS); Page(s) 23 To 28.
 
Paper: 

MODELING OF SUBSTRATE NOISE IMPACT ON A SINGLE-ENDED CASCODE LNA IN A LIGHTLY DOPED SUBSTRATE (RESEARCH NOTE)

 
 
Author(s):  AGHNOUT S.*, MASOUMI N.
 
* DEPARTMENT OF ELECTRONICS, SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING UNIVERSITY COLLEGE OF ENGINEERING, UNIVERSITY OF TEHRAN, TEHRAN, IRAN
 
Abstract: 

Substrate noise generated by digital circuits on mixed-signal ICs can disturb the sensitive analog/RF circuits, such as Low Noise Amplifier (LNA), sharing the same substrate. This paper investigates the adverse impact of the substrate noise on a high frequency cascade LNA laid out on alightly doped substrate. By studying the major noise coupling mechanisms, a new and efficient modeling method is proposed to predict, prior to processing, the LNA performance degradation due to the substrate noise. Our simulations prove that the model can estimate the magnitude of the spurious signals appearing at the output spectrum of the 5 GHz LNA, within an acceptable error of 13%.

 
Keyword(s): CMOS INTEGRATED CIRCUITS, MIXED SIGNAL IC, SUBSTRATE NOISE, LNA
 
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