US 12,288,577 B2
Sensing amplifier, method and controller for sensing memory cell
Hiroki Noguchi, Hsinchu (TW); Ku-Feng Lin, New Taipei (TW); and Yih Wang, Hsinchu (TW)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed on Mar. 2, 2023, as Appl. No. 18/177,749.
Application 17/731,248 is a division of application No. 16/925,295, filed on Jul. 9, 2020, granted, now 11,386,936, issued on Jul. 12, 2022.
Application 18/177,749 is a continuation of application No. 17/731,248, filed on Apr. 27, 2022, granted, now 11,631,440.
Claims priority of provisional application 62/982,071, filed on Feb. 27, 2020.
Prior Publication US 2023/0206963 A1, Jun. 29, 2023
Int. Cl. G11C 7/14 (2006.01); G11C 7/06 (2006.01)
CPC G11C 7/062 (2013.01) 20 Claims
OG exemplary drawing
 
1. A sensing amplifier, comprising:
a sensing amplifier circuit;
a multiplexer circuit, an output terminal thereof is coupled to the sensing amplifier circuit; and
a plurality of reference cells having equal value, each of the reference cell is coupled to each input node of the multiplexer circuit,
wherein the plurality of reference cells are selected sequentially and repeatedly by the multiplexer circuit, and the one of the reference cells is selected as a selected reference cell for coupling to the sensing amplifier circuit in response to each read operation to at least one memory cell is performed,
wherein the sensing amplifier circuit performs a read operation to the at least one first memory cell according to the selected reference cell comprising:
the sensing amplifier circuit compares a data voltage of the at least one first memory cell and a reference voltage of the selected reference cell; and
the sensing amplifier circuit obtains a data of the at least one first memory cell on an output terminal of the sensing amplifier circuit by a comparison result of the data voltage of the at least one first memory cell and the reference voltage of the selected reference cell.