Patent ID: 11915786
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A memory system, comprising:
a memory device configured to store data, the memory device comprising:
an array of memory cells comprising a plurality of columns of memory cells;
a plurality of bit lines respectively coupled to the plurality of columns of memory cells; and
a bit line discharge circuit coupled to the plurality of bit lines, comprising:
a plurality of first transistors each comprising a first terminal, a second terminal, and a third terminal, and each first terminal of the plurality of first transistors being directly coupled to one of the plurality of bit lines and each second terminal of the plurality of first transistors being coupled to a reference current generator to provide a discharge current to the one of the plurality of bit lines in a discharge operation, wherein the discharge operation discharges a charge on the plurality of bit lines; and
a plurality of second transistors, each second transistor being directly coupled to the third terminal of one of the plurality of first transistors at one end of the second transistor and a ground voltage source at another end of the second transistor to enable the discharge operation,
wherein:
the reference current generator collaborates with each of the plurality of first transistors to establish a current mirror, respectively, and the discharge current matches, through the current mirror, a reference current provided by the reference current generator; and
gate terminals of each of the plurality of second transistors are connected with and controlled by a discharge enable signal.