Time-domain Large-signal Measurements Research Articles

Table-based nonlinear HEMT model extracted from time-domain large-signal measurements

This paper presents an empirical table-based nonlinear HEMT model fully extracted from time-domain large-signal measurements. A simple and direct extraction procedure, based on a vector nonlinear network analyzer measurement system with load-pull facilities, demonstrates by experimental results on microwave transistors how a very reduced number of measurements is enough to obtain the current and charge generators to fill a lookup model. Table-based model extraction, implementation, and validation are described in this paper.

Construction of behavioral models for microwave devices from time domain large-signal measurements to speed up high-level design simulations

Behavioral models for microwave devices from time domain large-signal measurements are developed. For the presented examples, the model is defined by representing the terminal currents as a function of the terminal voltages and their derivatives. When using these models as building blocks of higher level designs, the simulation speed is significantly improved. © 2003 Wiley Periodicals, Inc. Int J RF and Microwave CAE 13: 54–61, 2003.

Direct extraction of nonlinear FET Q-V functions from time domain large signal measurements

The authors present a simple and accurate procedure for the direct extraction of the quasi-static FET model nonlinear charge functions from large signal measurements. The method is based on the proper use of a vector nonlinear network analyzer (VNNA) with load-pull facilities. To our knowledge, these results show for the first time a direct procedure to extract the nonlinear charges of a FET using a very reduced number of large signal measurements.

Direct extraction of nonlinear FET C-V functions from time domain large signal measurements

A simple technique for extracting the nonlinear intrinsic capacitances in a quasi-static HEMT model from large signal time domain microwave measurements is presented. This method is based on the use of a suitable load-pull configuration around a vector nonlinear network analyser.

Direct extraction of nonlinear FET I-V functions from time domain large signal measurements

A simplified method for extracting two port nonlinear field effect transistor current sources from time domain microwave voltage and current waveform measurements is presented. This method is based on the use of an appropriate reflective load-pull termination to ensure that the output voltage is 180° out of phase with the input voltage.