To provide a converter which can obtain a voltage-current converting output having the largest voltage amplitude within the operating voltage supplied from a controlling and arithmetic processing device in a control system composed of a detecting element which detects the state of an object to be controlled and the arithmetic processing device to arithmetically processing signals from the detecting element to control the object to be controlled.

The signal voltage-current converting circuit uses an attraction type signal voltage-current converter which is composed of an operational amplifier 2 to which the voltage Vin detected by means of a detecting element is inputted and a current control means which is controlled by means of the output of the amplifier 2 and outputs a detected voltage value after converting the voltage value into a current value and is constituted in a delivery type voltage- current converting circuit by providing a current mirror circuit 4 between a power source Vcc and the current control means 3 and connecting a load resistor RL composed of a low-resistance resistor having grounded one end to the output of the circuit 4.