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This paper presents a combined pulsed I(V) -pulsed RF state-of-the-art measurement system. Isothermal DC and AC measurement data can be achieved allowing a complete characterization and exploration of the save operating area (SOA) of advanced SiGe:C HBTs. System configuration, measurements and accuracy issues are presented.

This paper reports on the electrical and thermal characterization of a state of the art SiGe ring oscillator (RO) with 2.2 ps gate delay fabricated in a Si/SiGe:C technology featuring f T and f max of ~300 GHz and ~400 GHz, respectively. The transistor model is verified through DC and RF characteristics taken from the same die as the circuit measurements. Excellent agreement between measurements and compact model simulation is shown. A simple method is presented that calculates the nonlinear circuit temperature rise in the local circuit area resulting from mutual heating of all active and passive components. Once taken into account the circuit temperature, the accuracy of circuit simulation is significantly improved.