Interleaved sensing system for FIFO and burst-mode memories
First Claim
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1. An interleaved sensing system for decreasing the read access time in a sequential memory, comprising in combination:
- a sequential memory array formed of a plurality of memory cells for storing data, said memory cells being arranged in a plurality of odd columns and a plurality of even columns;
odd bit line means coupled to said plurality of odd columns;
even bit line means coupled to said plurality of even columns;
odd selecting means responsive to odd column select signals and coupled to said odd bit line means for accessing and transferring the stored data in selected ones of said memory cells in said odd columns to a pair of odd data lines;
even selecting means responsive to even column select signals and coupled to said even bit line means for accessing and transferring the stored data in selected ones of said memory cells in said even columns to a pair of odd data lines;
odd precharging means responsive to an odd precharging signal for precharging said pair of odd data lines prior to the transferring of the stored data in said odd columns to said pair of odd data lines;
even precharging means responsive to an even precharging signal for precharging said pair of even data lines prior to the transferring of the stored data in said even columns to said pair of even data lines;
odd sensing means coupled to said pair of odd data lines for sensing said stored data in said odd columns and for generating an odd output signal in response to an odd read signal;
even sensing means coupled to said pair of even data lines for sensing said stored data in said even columns and for generating an even output signal in response to an even read signal;
multiplexing means coupled to said odd and even sensing means for alternately supplying said odd output signal and said even output signal in a predetermined timing relationship; and
output means coupled to said multiplexing means for generating output data representing alternately said stored data in said odd and even columns in response to a read transfer signal.
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Abstract
An interleaved sensing system for decreasing the read access time in a sequential memory includes a sequential memory array formed of a plurality of memory cells for storing data. The memory cells are arranged in a plurality of odd columns and a plurality of even columns. Sensing means are provided for interleaving the stored data in the memory cells in the odd columns with the stored data in the memory cells in the even columns. An output buffer is coupled to the sensing means for generating data output representing alternately the stored data in the odd and even columns during alternate read cycles.
72 Citations
20 Claims
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1. An interleaved sensing system for decreasing the read access time in a sequential memory, comprising in combination:
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a sequential memory array formed of a plurality of memory cells for storing data, said memory cells being arranged in a plurality of odd columns and a plurality of even columns; odd bit line means coupled to said plurality of odd columns; even bit line means coupled to said plurality of even columns; odd selecting means responsive to odd column select signals and coupled to said odd bit line means for accessing and transferring the stored data in selected ones of said memory cells in said odd columns to a pair of odd data lines; even selecting means responsive to even column select signals and coupled to said even bit line means for accessing and transferring the stored data in selected ones of said memory cells in said even columns to a pair of odd data lines; odd precharging means responsive to an odd precharging signal for precharging said pair of odd data lines prior to the transferring of the stored data in said odd columns to said pair of odd data lines; even precharging means responsive to an even precharging signal for precharging said pair of even data lines prior to the transferring of the stored data in said even columns to said pair of even data lines; odd sensing means coupled to said pair of odd data lines for sensing said stored data in said odd columns and for generating an odd output signal in response to an odd read signal; even sensing means coupled to said pair of even data lines for sensing said stored data in said even columns and for generating an even output signal in response to an even read signal; multiplexing means coupled to said odd and even sensing means for alternately supplying said odd output signal and said even output signal in a predetermined timing relationship; and output means coupled to said multiplexing means for generating output data representing alternately said stored data in said odd and even columns in response to a read transfer signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An interleaved sensing system for decreasing the read access time in a sequential memory, comprising in combination:
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a sequential memory array formed of a plurality of memory cells for storing data, said plurality of memory cells being arranged in a plurality of blocks of memory cells, said memory cells in each of said plurality of blocks being arranged in a plurality of odd columns and a plurality of even columns; odd bit line means coupled to said plurality of odd columns in each of said plurality of blocks; even bit line means coupled to said plurality of even columns in each of said plurality of blocks; odd selecting means responsive to odd column select signals and coupled to said odd bit line means for accessing and transferring the stored data in selected ones of said memory cells in said odd columns to a pair of odd data lines; even selecting means responsive to even column select signals and coupled to said even bit line means for accessing and transferring the stored data in selected ones of said memory cells in said even columns to a pair of odd data lines; odd precharging means responsive to an odd precharging signal for precharging said pair of odd data lines prior to the transferring of the stored data in said odd columns to said pair of odd data lines; even precharging means responsive to an even precharging signal for precharging said pair of even data lines prior to the transferring of the stored data in said even columns to said pair of even data lines; odd sensing means coupled to said pair of odd data lines for sensing said stored data in said odd columns and for generating an odd output signal in response to an odd read signal; even sensing means coupled to said pair of even data lines for sensing said stored data in said even columns and for generating an even output signal in response to an even read signal; multiplexing means coupled to said odd and even sensing means for alternately supplying said odd output signal and said even output signal in a predetermined timing relationship; and output means coupled to said multiplexing means for generating output data representing alternately said stored data in said odd and even columns in response to a read transfer signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An interleaved sensing system for decreasing the read access time in a sequential memory, comprising in combination:
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a sequential memory array formed of a plurality of memory cells for storing data, said memory cells being arranged in a plurality of odd columns and a plurality of even columns; sensing means for interleaving said stored data in said memory cells in said odd columns with said stored data in said memory cells in said even columns; and output means coupled to said sensing means for generating output data representing alternately said stored data in said odd and even columns during alternate read cycles. - View Dependent Claims (20)
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Specification