Circuit Implementation, Operation, and Simulation of Multivalued Nonvolatile Static Random Access Memory Using a Resistivity Change Device

Table 1

Relationship of 𝑅_𝑚, nodes potential (S2 and PL), and applied pulse for the store operation.

		S2	PL
First store	𝑅𝑚 > 𝑅refb	L	H	Set pulse
	𝑅𝑚 < 𝑅refb	H	H	—
Second store	𝑅refa //𝑅refb < 𝑅𝑚	L	L	—
	𝑅refa//𝑅refb > 𝑅𝑚	H	L	Reset pulse