Circuit arrangement for a current-controlled resistor having an enlarged linear range

摘要

The invention relates to a circuit arrangement for a current-controlled resistor having an enlarged linear range, using an arrangement of non-linear bipolar load elements wherein the resistance is generated between a first terminal (E) and a second terminal (F), having at least one control terminal (X) that is fed by a supply current source (I1), wherein the arrangement of the non-linear bipolar load elements comprises at least a third chain (C) comprising one or more of the load elements (D_Cl . . . D_Ci), the load elements being connected in series where there is more than one of them, and comprises a first chain (A) and a second chain (B) each comprising one or more load elements (D_Al . . . D_Aj and D_Bl . . . D_Bk respectively), the load elements again being connected in series where there is more than one of them in either of the chains (A, B), the second and the third chain (A, B) have a common point of connection (Y) to the first chain (C) and a further common point of connection (Z) to one another, which further common point of connection (Z) is connected to a fourth chain (D) of non-linear bipolar load elements (D_D1 . . . D_D1), the first resistor terminal (E) is connected directly or indirectly to the first chain (A) and the second chain (B) is connected directly or indirectly to the second resistor terminal (F) and directly or indirectly to the third and the fourth chain (C, D) as well.