Synaptic element for performing polynomial operation and electronic circuit including the same

An electronic circuit comprising:

• a synaptic element;
• and
• a variable resistor, and
• wherein the synaptic element includes:
• a gate electrode connected to an input terminal;
• a first electrode;
• a second electrode connected to one end of the variable resistor and an output terminal;
• and
• a multilayer tunnel insulating film in contact with each of the gate electrode, the first electrode, and the second electrode, and disposed such that the gate electrode is spaced apart from the first electrode and the second electrode, and
• wherein the synaptic element generates a tunneling current flowing from the first electrode to the gate electrode through the multilayer tunnel insulating film based on a gate voltage pulse applied to the gate electrode through the input terminal,
• wherein the synaptic element operates in one of a turn-on mode, a turn-off mode, and an intermediate mode different from the turn-on mode and the turn-off mode based on the tunneling current,
• wherein the synaptic element is trained to generate a drain current in each of the turn-on mode, the turn-off mode, and the intermediate mode, and
• wherein the synaptic element controls an output voltage output to the output terminal through the second electrode based on the drain current and a resistance value of the variable resistor.