Arrangement for forming the reciprocal value of an input current

Abstract

The invention relates to an arrangement for forming a reciprocal value of an input current (Iin), comprising: a power supply source (22); a current source (21) for generating a current (I0) for adjusting at least one operating point; a diode circuit with two devices operating as diodes (30, 31 and Q1, Q2), which are coupled in series; a transistor (Q3), in which a base of the transistor (Q3) is coupled between the diode circuit and the current source and in which a collector of the transistor (Q3) is coupled between the current source and the power supply source; and a further transistor (Q4), in which a base of the further transistor (Q4) is coupled to an emitter of the transistor (Q3) and an input current terminal and in which an emitter of the further transistor (Q4) is connected to the input current terminal of the diode circuit and the power supply source in such a way that an output current (Iout) flowing through the collector of the further transistor (Q4) is proportional to the reciprocal value of the amount of an input current (Iin) supplied via the input current terminal.

Dependencies are inferred from the claim text.