US Patent 11302392 Analog-to-digital converter and neuromorphic computing device including the same

An analog-to-digital converter is connected to a crossbar array including a plurality of resistive memory cells. Each of the plurality of resistive memory cells includes a resistive element. The analog-to-digital converter includes a voltage generator and processing circuitry. The voltage generator includes at least one resistive memory element including a same resistive material as the resistive element included in the crossbar array, and is configured to generate a first voltage based on a reference voltage and the at least one resistive memory element and to divide the first voltage to generate at least one divided voltage. The processing circuitry is configured to compare a signal voltage generated from the crossbar array with the at least one divided voltage to generate at least one comparison signal and generate at least one digital signal corresponding to the signal voltage based on the at least one comparison signal.