Digital Input Circuit for Receiving Digital Input Signals of a Signal Generator

A digital input circuit for receiving digital input signals of a signal generator, the digital input circuit comprising:

• an input to receive an input signal, wherein the digital input circuit adopts a first state in response to the input signal reaching or dropping below a lower threshold value and adopts a second state in response to the input signal reaching or exceeding an upper threshold value;
• a first subcircuit comprising at least one current stabilizing element with a driving circuit and at least one voltage stabilizing element, wherein the first subcircuit exhibits a non-ideal current output behavior at least in the second state;
• and
• a second subcircuit comprising at least one current stabilizing element with a driving circuit and at least one voltage stabilizing element, wherein the second subcircuit exhibits a non-ideal current output behavior at least in the second state,
• wherein the first and second subcircuits are configured such that at least in the second state or at least in a portion of the second state, an electric current that flows through the voltage stabilizing element of the first subcircuit consists substantially of a stabilized current of the second subcircuit, and an electric current that flows through the voltage stabilizing element of the second subcircuit consists substantially of a stabilized current of the first subcircuit, such that the non-ideal current output behavior of the first subcircuit and the non-ideal current output behavior of the second subcircuit substantially compensate for each other at least in the second state.