On the Validity of Single-Ended Mixed-Mode S-Parameter Measurements for Differential Active Devices

Oliver Schmitz, Sven Karsten Hampel, Hanno Rabe, J. Simon, Ilona Rolfes

39th European Microwave Conference (EuMC 2009), pp. 691-694 , Rome, Italy, Sep 29 - Oct 1, 2009


This paper examines the differences occurring between virtual and true differential probing of active balanced devices in large signal region. The analysis is carried out by means of gain compression of single stage pseudo and true differential amplifiers. Based on analytical derivations, a simulation model for these amplifiers is developed and verified by measurement results. Finally, the reason for the deviation between virtual and true differential measurements is highlighted.

[IEEE Library]

Tags: and, differential, Measurements, true, Virtual