Patent ID: 6784669
Filing Date: 2004-08-31
Classification: G01D,H03F

Abstract:
Electrical circuit arrangement for converting an electrical input variable (voltage or current) into an impressed electrical output voltage, there being a predefined relationship between the input variable and the output voltage, whereina first arithmetic circuit (15) is provided which converts a voltage (ue1) fed therein in a first impressed voltage (ua1), a second arithmetic circuit (20) is provided which converts an input voltage (ue2) fed thereto into a second impressed voltage (ua2), a voltage (ue) present at input terminals (11, 12) of the circuit arrangement (10) is fed to the first arithmetic circuit (15), the voltage (ue2) which drops across a resistor (25) which is connectable to the input terminals (11, 12) of the circuit arrangement (10) is fed to the second arithmetic circuit (20), for conversion of voltage (ue), output voltage (ua1) of the first arithmetic circuit (15) is used as output voltage (ua) of the circuit arrangement (10), and for conversion of a current (ie), the current (ie) is fed to the resistor (25) and output voltage (ua2) of the second arithmetic circuit (20) is used as the output voltage (ua) of the circuit arrangement (10), wherein the resistor (25) is connected to the input terminals (11, 12) of the circuit arrangement (10) via a switch (26), a changeover switch (27) connects output (18 or 23) of arithmetic circuit (15, 20) to output (13) of the circuit arrangement (10), for conversion of a voltage (ue), the switch (26) is opened and the changeover switch (27) feeds the output voltage (ua1) of the first arithmetic circuit (15) to the output (13) of the circuit arrangement (10), and for conversion of a current (ie), the switch (26) is closed and the changeover switch (27) feeds the output voltage (ua2) of the second arithmetic circuit (20) to the output (13) of the circuit arrangement (10).