Ferroelectric memory array with hierarchical plate-line architecture
A plate line segment selector circuit, coupled to a plate line segment, a plate line and a word line, may include (a) a P-channel transistor having a gate terminal connected to the plate line, a source terminal connected to the word line, and a drain terminal connected to the plate line segment; and (b) a N-channel transistor having a gate terminal connected to the plate line, a drain terminal connected to the plate line, and a source terminal connected to a ground reference voltage source. Alternatively, the plate line segment selector circuit may include: (a) a P-channel transistor having a gate terminal connected to the plate line, a source terminal connected to a predetermined voltage source, and a drain terminal; (b) a N-channel transistor having a gate terminal connected to the plate line, a source terminal connected to a ground reference voltage source, and a drain terminal; and (c) a field effect transistor having a gate terminal connected to the word line, a first drain or source terminal connected to the drain terminals of the P-channel and N-channel transistors and a second drain or source terminal connected to the plate line segment.
1. A ferroelectric memory circuit, comprising:
one or more arrays of memory cells, each array being organized into a plurality of rows and a plurality of columns;
a plurality of groups of bit lines, wherein each group encompasses bit lines associated with multiple adjacent columns, and each bit line in each group is coupled to memory cells of a different one of the group's associated adjacent columns;
a plurality of word lines, each providing a control signal to an associated rows of memory cells in one or more of the memory arrays;
a plurality of plate lines, each plate line serving memory cells of a different one of the groups of bit lines;
a plurality of plate line segments each providing a voltage to an associated row of memory cells in an associated array; and
a plurality of plate line segment selector circuits each coupled to an associated plate line segment, an associated plate line and an associated word line, each plate line segment selector circuit comprising:
a P-channel transistor having a gate terminal connected to the associated plate line, a source terminal connected to the associated word line, and a drain terminal connected to the associated plate line segment; and
a N-channel transistor having a gate terminal connected to the associated plate line, a drain terminal connected to the associated plate line segment, and a source terminal connected to a ground reference voltage source.
2. A ferroelectric memory circuit as in claim 1 , further comprising a plurality of groups of sense amplifier circuits, each group of sense amplifier serving memory cells associated with a different one of the groups of bit lines.