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Nonlinearity Analysis of Analog/RF Circuits Using Combined Multisine and Volterra Analysis Host Publication: Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet Authors: J. Borremans, L. De Locht, P. Wambacq and Y. Rolain Publication Date: Apr. 2007
Abstract: Modern integrated radio systems require highly linear
analog/RF circuits. Two-tone simulations are commonly used
to study a circuit's nonlinear behavior. Very often, however, this
approach suffers limited insight. To gain insight into nonlinear
behavior, we use a multisine analysis methodology to locate the
main nonlinear components (e.g. transistors) both for weakly and
strongly nonlinear behavior. Under weakly nonlinear conditions,
selective Volterra analysis is used to further determine the most
important nonlinearities of the main nonlinear components. As
shown with an example of a 90 nm CMOS wideband low-noise
amplifier, the insights obtained with this approach can be used to
reduce nonlinear circuit behavior, in this case with 10 dB. The
approach is valid for wideband and thus practical excitation
signals, and is easily applicable both to simple and complex
circuits.
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