Matched feedback integrate-and-fire neuron circuit

The present invention relates to an integrate-and-fire neuron circuit for signed processing which is characterized by a feedback subcircuit connected to the positive and negative outputs of the circuit. This feedback subcircuit is configured to generate and output positive charge packets to a common line of the neuron circuit on each negative spike output signal and stored weights and to generate and output negative charge packets to the common line based on each positive spike output signal and stored weights. Due to this feedback circuit that is build in the same way as the input weighting circuit, structural matching and therefore higher accuracy and less variation of the behavior over PVT variations is achieved.