Patent ID: 7423481

Claim:
An amplifier arrangement comprising a first and a second resistor network comprising: an amplifier comprising a first input, a second input and an output, the first resistor network, comprising a first parallel circuit formed by a first number N of resistors, and the second resistor network, comprising a first resistor or a second parallel circuit formed by a second number M of resistors, wherein the resistors of the first and second resistor networks each comprise approximately the same nominal value, an approximately identical width W and an approximately identical length L of a resistive layer, and wherein the first and second resistor networks are coupled to the amplifier, wherein the second resistor network comprises at least one fourth parallel circuit which comprise a fourth number P of resistors that is connected in series with the first resistor or the second parallel circuit, wherein the first resistor or the second parallel circuit is connected at its first terminal to a first terminal of the second resistor network by means of a third switch, and wherein the at least one fourth parallel circuit is connected at its first terminal to the first terminal of the second resistor network by means of at least one fourth switch and is coupled at its second terminal to a second terminal of the second resistor network.