US 11,682,452 B2
Local bit select with improved fast read before write suppression
Antonio Pelella, Highland Falls, NY (US); Dongho Lee, Poughkeepsie, NY (US); Genadi Tverskoy, Poughkeepsie, NY (US); Zhiying Chen, Poughkeepsie, NY (US); and Brian James Yavoich, Highland, NY (US)
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Sep. 21, 2021, as Appl. No. 17/480,191.
Prior Publication US 2023/0086799 A1, Mar. 23, 2023
Int. Cl. G11C 7/12 (2006.01); G11C 11/412 (2006.01); H03K 19/017 (2006.01); G11C 11/419 (2006.01); G11C 11/413 (2006.01); G11C 7/10 (2006.01)
CPC G11C 11/412 (2013.01) [G11C 11/413 (2013.01); G11C 11/419 (2013.01); H03K 19/01742 (2013.01); G11C 7/1078 (2013.01); G11C 2207/002 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A local bit-select circuit comprising:
a first set of pull-down devices comprising a first pull-down device and a second pull-down device, wherein a first source terminal of the first pull-down device is connected to a voltage supply, wherein a first drain terminal of the first pull-down device is directly connected to a second source terminal of the second pull-down device via a connection line, and wherein the connection line is distinct from a compliment read local bit line, wherein a first gate terminal of the first pull-down device is connected to a true read local bitline, and wherein the first drain terminal of the first pull-down device is disconnected from the compliment read local bit line while the second pull-down device is in an open state;
wherein a second drain terminal of the second pull-down device is connected to the compliment read local bit line, and wherein a second gate terminal of the second pull-down device is connected to a true write global bitline;
a second set of pull-down devices comprising a third pull-down device and a fourth pull-down device, wherein a third source terminal of the third pull-down device is connected to the voltage supply, wherein a third drain terminal of the third pull-down device is directly connected to a fourth source terminal of the fourth pull-down device via a connection line distinct from the true read local bit line, wherein a third gate terminal of the third pull-down device is connected to the compliment read local bitline, and wherein the third drain terminal of the third pull-down device is disconnected from the compliment read local bit line while the fourth pull-down device is in an open state; and
wherein a fourth drain terminal of the fourth pull-down device is connected to the true read local bitline, and wherein a fourth gate terminal of the fourth pull-down device is connected to a compliment write global bit line.