Active memristor based spiking neuromorphic circuit for motion detection

A method for determining a direction of motion and a velocity of an object comprising:

• providing a first photo-receptor for sensing the object;
• providing an excitatory active memristor neuron circuit coupled to the first photo-receptor;
• providing a second photo-receptor for sensing the object;
• providing an inhibitory active memristor neuron circuit coupled to the second photo-receptor;
• providing a self-excitatory active memristor output-counter neuron circuit coupled to the excitatory active memristor neuron circuit and coupled to the inhibitory active memristor neuron circuit;
• sending an excitatory pulse from the excitatory active memristor neuron circuit to the self-excitatory active memristor output-counter neuron circuit if the first photo-receptor senses the object, wherein the self-excitatory active memristor output-counter neuron circuit outputs pulses at a periodic rate upon receiving the excitatory pulse;
• and
• sending an inhibitory pulse from the inhibitory active memristor neuron circuit to the self-excitatory active memristor output-counter neuron circuit if the second photo-receptor senses the object, wherein the self-excitatory active memristor output-counter neuron circuit ceases to output pulses upon receiving the inhibitory pulse.

A motion-sensing circuit for determining a two dimensional direction of motion and velocity of an object comprising:

• a first photo-receptor for sensing the object located in a center position;
• a second photo-receptor for sensing the object located above the first photo-receptor;
• a third photo-receptor for sensing the object located below the first photo-receptor;
• a fourth photo-receptor for sensing the object located to a left of the first photo-receptor;
• a fifth photo-receptor for sensing the object to a right of the first photo-receptor;
• a first direction sensitive device located above the second photo-receptor and coupled to the first photo-receptor and the second photo-receptor;
• a second direction sensitive device located below the third photo-receptor and coupled to the first photo-receptor and the third photo-receptor;
• a third direction sensitive device located to the left of the fourth photo-receptor and coupled to the first photo-receptor and the fourth photo-receptor;
• and
• a fourth direction sensitive device located to the right of the fifth photo-receptor and coupled to the first photo-receptor and the fifth photo-receptor;
• wherein the first, second, third and fourth direction sensitive devices each comprise:
• an excitatory active memristor neuron circuit;
• an inhibitory active memristor neuron circuit;
• and
• a self-excitatory active memristor output-counter neuron circuit coupled to the excitatory active memristor neuron circuit and coupled to the inhibitory active memristor neuron circuit.