| 摘要 |
The invention relates to a circuit arrangement provided with a voltage-current converter comprising: a differential amplifier (VV) provided with a first input terminal (K1) for connection to a reference voltage source (RSB) for generating a reference voltage Vref, a second input terminal (K2) for connection of a reference resistor Rref, and an output, means (I) for generating a first current through the reference resistor Rref, and a current amplifier (SV) for generating a second current and provided with an input coupled to the output of the differential amplifier. According to the invention, the circuit arrangement is characterized in that the differential amplifier is provided with a low-pass filter, in that the current amplifier on the one hand and the means (I) and the reference resistor on the other hand exclusively comprise mutually separate components, and in that the circuit arrangement is in addition provided with means (II) coupled to the current amplifier and to the means (I) for influencing the first current in dependence on the second current. It is achieved thereby that an interference signal present at the second input terminal hardly causes any appreciable interference in the second current. |
