Crossbar control circuit

A control circuit including a crossbar array having input columns and output rows configured to store first stored data in the form of high or low resistance states wherein the input columns are connected to a common electrical input having an input voltage (Vin) and the output rows are connected to a common summing circuit wherein the circuit is configured to produce a total transfer function based on the ratio of an output voltage (Vout) from the common summing circuit to an input voltage (Vin) to the common electrical input which can be approximated by:

• Vout/Vin=Σcjbj/(1+ajs)
• wherein j is a summation index according to the output rows of the crossbar array, the values of bj are determined by the resistance states of the crosspoints for a corresponding row, cj=1 or −1 depend on the configuration of the common summing circuit for a corresponding row, and the values of 1/(1+ajs) are transfer functions in the Laplace domain associated with a corresponding row.

A method including the steps of:

• providing a control circuit including a crossbar array having input columns and output rows configured to store first stored data in the form of high or low resistance states wherein the input columns are connected to a common electrical input having an input voltage signal and the output rows are connected to a common summing circuit configured to sum signals from the rows to produce an output voltage signal, wherein the control circuit is configured to produce a transfer function based on the ratio of the output voltage to the input voltage which is determined by the resistance states of the crossbar array;
• and
• reprogramming resistance states of the crossbar array.