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US 2022/0068369 A1Published application
Decoding for pseudo-triple-port sram
AssigneeQUALCOMM Incorporated
InventorsArun Babu PALLERLA, Changho JUNG
Life of this patent
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Abstract
A word line decoder for pseudo-triple-port memory is provided that includes a first logic gate for decoding a word line address to a first word line in a word line pair and a first word line clock signal. The decoder further includes a second logic gate for decoding a word line address to a second word line in the word line pair and a second word line clock signal.
Claims26
A word line decoder for a memory, comprising:
- a word line pair for a bitcell, the word line pair including a first word line and a second word line;
- a first logic gate configured to assert the first word line responsive to a pre-decoded first word line address and a first word line clock signal;
- and
- a second logic gate configured to assert the second word line responsive to a second word line address and a second word line clock signal;
- a first transistor having a first drain/source terminal coupled to the first word line and having a second drain/source terminal coupled to the second word line;
- and
- a third logic gate configured to process an output signal from the first logic gate and an output signal from the second logic gate, the third logic gate having an output node connected to a gate of the first transistor.
4 more elements
(canceled)
A method of word line decoding for a memory, comprising:
- in a first logic gate, processing a first pre-decoded first word line address and a first word line clock signal;
- asserting a first word line in a first word line pair for a first bitcell during a first word line assertion period in a cycle of a memory clock signal responsive to the processing of the first pre-decoded first word line address and the first word line clock signal;
- in the first logic gate, processing a second pre-decoded first word line address and the first word line clock signal;
- asserting the first word line in the first word pair during a second word line assertion period in the cycle of the memory clock signal responsive to the processing of the second pre-decoded first word line address and the first word line clock signal;
- in a second logic gate, processing a pre-decoded second word line address and a second word line clock signal;
- and
- asserting a second word line in the first word pair during the second word line assertion period in the cycle of the memory clock signal responsive to the processing of the pre-decoded second word line address and the second word line clock signal.
4 more elements
A memory, comprising:
- a column including a plurality of bitcells;
- a first bit line;
- a second bit line;
- a plurality of word line pairs corresponding to the plurality of bitcells, each bitcell having a first read port coupled to the first bit line through a first access transistor configured to be controlled by a first word line in the corresponding word line pair, each bitcell having a second read port coupled to the second bit line through a second access transistor configured to be controlled by a second word line in the corresponding word line pair;
- and
- a word line decoder including a plurality of logic gate pairs corresponding to the plurality of word line pairs, each logic gate pair comprising a first logic gate configured to assert the first word line in the corresponding word line pair and a second logic gate configured to assert the second word line in the corresponding word line pair, the word line decoder further including a plurality of third logic gates corresponding to the plurality of word line pairs, each third logic gate in the plurality of logic gates having an output node connected to a gate of the first access transistor in a respective bitcell from the plurality of bitcells.
3 more elements
Dependencies are inferred from the claim text.