Current readout circuit and memristor array column current readout circuit

Abstract

The invention provides a current readout circuit and a memristor array current readout circuit, and the current readout circuit comprises a biasing circuit, a depth negative feedback circuit, a current attenuation circuit, and an integral ignition circuit. The current attenuation circuit is connected with the biasing circuit, the deep negative feedback circuit and the integral ignition circuit; the depth negative feedback circuit is also connected with the biasing circuit, and is connected with the column line output end of the memristor array circuit; the bias circuit is used for providing proper bias for the deep negative feedback circuit; the depth negative feedback circuit is used for clamping the column line voltage of the memristor array circuit; and the current attenuation circuit is used for attenuating the column line current of the memristor array circuit in a preset proportion and inputting the attenuated current into the integral ignition circuit, so that the integral ignition circuit outputs a digital pulse signal. According to the invention, the column current of the memristor array circuit can be read efficiently and accurately, and the calculation accuracy of multiply-accumulate operation based on the memristor array is improved.

Description

technical field [0001] The present application relates to the technical field of integrated circuits, in particular to a current readout circuit and a memristor array column current readout circuit. Background technique [0002] Memristors are regarded as the fourth basic device besides resistors, capacitors, and inductors. Their resistance value can be adjusted under external excitation and will not be lost after power-off. The memristors are interconnected in a cross array, adjust the memristors at each cross point in the array to the required resistance, and apply the signal to be processed in the form of a voltage on each row line, then according to the Kirchhoff current According to the law, the current generated by the action of the input signal and the memristor is accumulated on the column line, which can be regarded as completing a multiply-accumulate operation. [0003] Correctly reading the column current is the key to realize the multiplication and accumulation ...

AI Technical Summary

Problems solved by technology

However, during the capacitance integration process of the integral ignition circuit, the voltage change at both ends of the capacitor will cause the voltage change on the column line, which will affect the calculation accuracy, and the multiplication and accumulation operation function cannot be realized.

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