the invention relates to a resistance reactance adjustment of a quadrupole type r1c.in series or in parallel, to compensate for the drop in frequency when the amplifier gain is independent of frequency.;it consists of a quadrupole, between the input terminal (1) and an output terminal (3) two series circuits, impedance z and z2, and in parallel with these, a third impedance circuit z3.it also includes a fourth impedance circuit connected between the common point 3, (5) to the first two circuits (z1z2) and the common point (6) for the other two terminals (2,4) of the quadrupole.the reactor is to adapt if it is to r1c z3 model in parallel. it is: if it is of type a1 c in series.the values of the other three impedances z3 and z4, and z1z2 are related, so that the input impedance is equal to the output impedance zo.;application of high frequency and wide band amplifier.
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