Analog multiplier using a memristive device and method for implemening Hebbian learning rules using memrisor arrays

A device, comprising:

• an array of cells, wherein the cells are arranged in columns and rows;
• wherein each cell comprises a single memristor;
• an interfacing circuit that is coupled to each cell of the array of cells;
• wherein the interfacing circuit is arranged to:
• receive or generate first variables and second variables;
• generate memristive device input signals that once provided to memristors of the array will cause a change in a state variable of each of the memristors of the array, wherein the change in the state variable of each of the memristors of the array reflects a product of one of the first variables and one of the second variables;
• provide the memristive device input signals to memristors of the array;
• and
• receive output signals that are a function of at least products of the first variables and the second variables.

A method for analog multiplication of a first variable and a second variable, the method comprises:

• generating or receiving the first variable and the second variable;
• generating at least one memristive device input signal that once provided to a memristor will cause a change in a state variable of the memristor, wherein the change in the state variable of the memristor reflects a product of the first and second variables;
• providing to the memristor the at least one memristive device input signal;
• evaluating the state variable of the memristor;
• and
• generating information about the product.

A method, comprising:

• receiving or generating first variables and second variables;
• generating memristive device input signals that once provided to memristors of an array of cells will cause a change in a state variable of each of the memristors of the cells of the array, wherein the change in the state variable of each of the memristors of the cells of the array reflects a product of one of the first variables and one of the second variables;
• providing the memristive device input signals to the memristors of the array;
• and
• receiving output signals that are a function of at least products of the first variables and the second variables.