An analysis of the read margin and power consumption of crossbar ReRAM arrays

The read margin and power consumption for various selector characteristics and bias schemes are analyzed during read operation. The 1/2 and 1/3 bias schemes exhibit different read operation properties. There is a trade-off between the read margin and power consumption that depends on the bias scheme and characteristics of the selector. The read margin of the 1/2 bias scheme is decreased at low on/off ratios because of the output voltage drop across the LRS cell. This drop is due to a rapid increase in the leakage current when a selector with low on/off ratio is used in the 1/2 bias scheme. Therefore, the bias scheme and selector should be selected appropriately according to the purpose of the application.