US 11,894,049 B1
CFET SRAM cell utilizing 8 transistors
Plamen Asenov, Glasgow (GB); and Victor Moroz, Saratoga, CA (US)
Assigned to Synopsys, Inc., Mountain View, CA (US)
Filed by Synopsys, Inc., Mountain View, CA (US)
Filed on Dec. 2, 2021, as Appl. No. 17/540,903.
Claims priority of provisional application 63/121,712, filed on Dec. 4, 2020.
Int. Cl. G11C 11/412 (2006.01); G11C 11/419 (2006.01); H10B 10/00 (2023.01)
CPC G11C 11/412 (2013.01) [G11C 11/419 (2013.01); H10B 10/125 (2023.02)] 9 Claims
OG exemplary drawing
 
1. A memory cell, comprising:
a pair of cross-coupled inverters as a storage element, a first inverter in the pair of cross-coupled inverters having a first output at a first node, a second inverter in the pair of cross-coupled inverters having a second output at a second node;
a first complementary transmission gate including a first nMOS pass gate and a first pMOS pass gate, connected between the first node and a first bit line;
a second complementary transmission gate including a second nMOS pass gate and a second pMOS pass gate, connected between the second node and a second bit line;
a first word line connected to gate conductors of the first and second nMOS pass gates in the first and second complementary transmission gates; and
a second word line connected to gate conductors of the first and second pMOS pass gates in the first and second complementary transmission gates,
wherein a signal drop is triggered on the second word line to generate a first voltage drop on the first bit line,
wherein, after the signal drop is triggered on the second word line, a bump voltage is generated at the first node and then the bump voltage drops, and
wherein a signal rise is triggered on the first word line, after the bump voltage drops, to generate a second voltage drop on the first bit line.