METHOD FOR DESIGNING HIGH FREQUENCY CIRCUIT AND INSTRUMENT FOR MEASURING SEMICONDUCTOR HIGH FREQUENCY

摘要

PROBLEM TO BE SOLVED: To accurately design a high frequency circuit at a high designing speed. SOLUTION: The input-output impedance matching of a semiconductor device 1 for high frequency is realized by setting impedance produced by the high frequency circuit simulation of a computer 9 in electronic control impedance matching circuits 7A and 7B. A modulation signal MS1 is generated from a modulation signal source 6 including a digital-analog converter on the basis of a control signal generated by the high frequency simulation by the computer 9 and inputted to the semiconductor device 1 for high frequency through the matching circuit 7A. An output signal from the semiconductor device 1 for high frequency is extracted through the matching circuit 7B and measured by a spectrum analyzer 8 including analog-digital converter. High frequency measured data are fetched to the computer 9 and reflected on the high frequency circuit simulation by the computer 9.