Linear broadband amplifier e.g. measuring amplifier, for measuring techniques, has amplifier stages connected in parallel between hybrid couplers, where stages are based on transistors made of semiconductor materials with large band gaps

摘要

The circuit has an input (HF-IN) and an output (HF-OUT), where a 90 degrees hybrid coupler (1a) is connected with the input, and a 90 degrees hybrid coupler (1b) is connected with the output. Two amplifier stages (2a, 2b) are connected in parallel between the two hybrid couplers. The hybrid couplers are hybrid couplers with a work area of 1/ n octave between the lower frequency value and an upper frequency value. The two amplifier stages are based on transistors, which are manufactured from semiconductor materials with large electronic band gaps.