A Nonlinear S-parameters Behavioral Model for RF LNAs
White Paper
ABSTRACT
A nonlinear behavioral model for radio frequency low noise amplifiers (LNA’s) is presented. The model captures effects of nonlinearity, output power saturation, noise figure and port impedance mismatch. A high-level S-parameters approach is adopted during the model derivation. Consequently, the model inherits the S-parameters dual ability to characterize the transfer function between ports while including their impedances. The model derivation is thoroughly discussed showing how the effects of intermodulation as well as output power saturation can be included within the S-parameters representation for the block. Furthermore, in order to minimize the calibration effort, the model generics are made such that they map directly to typical LNA specifications. It follows that the model as implemented is not topology specific and can be easily calibrated to serve within top-down or bottom-up verification flows. Finally, the model accuracy is validated against reference transistor level simulations. Results comparison shows good agreement is attained. Keywords Behavioral model, intermodulation, LNA, non-linearity, radio-frequency, S parameters.
Related Resources
Characterizing PLL Jitter from Power Supply Fluctuation...
White PaperCharacterizing PLL Jitter from Power Supply Fluctuation Using Mixed-Signal
Characterizing PLL Jitter is important yet challenging. Usually done through transistor-level transient analysis, slow simulation speed has been the major bottleneck preventing jitter from being characterized...
High Speed, Accurate AMS Simulations Reduces Transient...
White PaperHigh Speed, Accurate AMS Simulations Reduces Transient Noise in Complex CMOS Circuits
As implementable analog circuit size has increased significantly due to advancements in manufacturing process, analog designers of system large scale integration (LSI) face increasingly difficult problems....
IC Design Flow With Pyxis
Training course Jun 24–27 : Tempe, ArizonaIC Design Flow With Pyxis
IC Design Flow With Pyxis will provide all the knowledge needed to apply the power of Pyxis, Mentor’s integrated IC design environment, to your most challenging VLSI designs. The course covers the...