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(a) ECM-based CRS device with series resistor. In the ON-window a relevant voltage drop is taken over by the series resistor. (b) ECM-based CRS device without series resistor. Due to SET/RESET asymmetry of ECM cells (e.g., VSET = 0.2 V and VRESET < −0.05 V), a RESET of the second CRS part cell B occurs directly after SET of the first part cell A.
