US 12,456,512 B2
Systems, apparatuses, and methods of using local input/output (LIO) lines for precharging and equalizing digit lines of sense amplifiers
John Schreck, Boise, ID (US)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by MICRON TECHNOLOGY, INC., Boise, ID (US)
Filed on Jan. 27, 2022, as Appl. No. 17/649,173.
Prior Publication US 2023/0238051 A1, Jul. 27, 2023
Int. Cl. G11C 11/4091 (2006.01); G11C 5/06 (2006.01); G11C 11/4074 (2006.01); G11C 11/4093 (2006.01)
CPC G11C 11/4091 (2013.01) [G11C 5/06 (2013.01); G11C 11/4074 (2013.01); G11C 11/4093 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first digit line pair;
a first sense amplifier coupled to the first digit line pair,
a second digit line pair;
a second sense amplifier coupled to the second digit line pair;
a local data line pair configured to be selectively connected to the first sense amplifier and the second sense amplifier;
an equalization device consisting of a single transistor coupled between a first line and a second line of the local data line pair, wherein the equalization device is configured to selectively connect the first line and the second line together and the equalization device is shared by the first and the second sense amplifiers; and
a digit precharge voltage circuit consisting of a single transistor configured to selectively connect the first line, the second line, or both to a midpoint potential, the digit precharge voltage circuit coupled to the first line of the local data line pair through the equalization device and the digit precharge voltage circuit coupled to the second line of the local data line pair,
wherein during a digit precharge operation;
the first line and the second line of the local data line pair are connected together by the equalization device;
the first line, the second line or both of the local data line pair are connected to the midpoint potential by the digit precharge voltage circuit; and
the first line and the second line are connected to the first digit line pair or the second digit line pair or both and provide the midpoint potential to the first digit line pair or the second digit line pair or both.