Column decoder circuit for page reading of a semiconductor memory
First Claim
1. A column decoder circuit for page reading of a semiconductor memory, comprising:
- a first level decoder stage having an input connected to an address bus and an output connected to a first level bus;
a second level decoder stage having at input connected to said address bus and connected an output connected to a second level bus; and
a plurality of bit selection stages, each including a plurality of selection branches and a multiplexer, said selection branches being connected to respective inputs of said multiplexer and having a plurality of first level selector stages and a second level selector stage, each of said first level selector stages being connected to said first level bus, to respective bit lines, and to a respective second level selector stage, each second level selector stage having a first addressing circuit for addressing a first group of bit lines;
a second addressing circuit for addressing a second group of bit lines, and a selection circuit for selecting one of said first and second groups of bit lines.
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Accused Products
Abstract
A column decoder circuit for page reading of a semiconductor memory includes a first level decoder stage, a second level decoder stage, and a plurality of bit selection stages, each comprising a plurality of selection branches; wherein each selection branch is connected to a respective input of a multiplexer and has a plurality of first level selector stages and a second level selector stage. Each second level selector stage comprises a first addressing selector for addressing a first group of bit lines. Each bit selection stage further comprises a second addressing selector for addressing a second group of bit lines, current and next page selectors for selecting one of the first and second groups of bit lines.
29 Citations
24 Claims
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1. A column decoder circuit for page reading of a semiconductor memory, comprising:
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a first level decoder stage having an input connected to an address bus and an output connected to a first level bus;
a second level decoder stage having at input connected to said address bus and connected an output connected to a second level bus; and
a plurality of bit selection stages, each including a plurality of selection branches and a multiplexer, said selection branches being connected to respective inputs of said multiplexer and having a plurality of first level selector stages and a second level selector stage, each of said first level selector stages being connected to said first level bus, to respective bit lines, and to a respective second level selector stage, each second level selector stage having a first addressing circuit for addressing a first group of bit lines;
a second addressing circuit for addressing a second group of bit lines, and a selection circuit for selecting one of said first and second groups of bit lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for page reading of a semiconductor memory having a first level decoder stage having an input to an address bus and an output connected to a first level bus, a second level decoder stage having an input connected to said address bus and an output connected to a second level bus;
- and a plurality of bit selection stages, each bit selection stage comprising a plurality of selection branches and a multiplexer, said selection branches being connected to respective inputs of said multiplexer and having a plurality of first level selector stages and a second level selector stage;
each of said first level selector stages being connected to said first level bus, to respective bit lines, and to a respective second level selector stage;the method comprising;
addressing a first group of bit lines;
addressing a second group of bit lines, and selecting one of said first and second groups of bit lines.
- and a plurality of bit selection stages, each bit selection stage comprising a plurality of selection branches and a multiplexer, said selection branches being connected to respective inputs of said multiplexer and having a plurality of first level selector stages and a second level selector stage;
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12. A memory circuit comprising:
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a first level decoder stage having an input connected to an address bus and an output connected to a first level bus;
a second level decoder stage having an input connected to said address bus and an output connected to a second level bus;
a third level decoder stage having an input connect to said address bus and an output connect to a third level bus; and
a plurality of bit selection stages, each including a plurality of selection branches and a multiplexer, said selection branches being connected to respective inputs of said multiplexer and having a plurality of first level selector stages, a plurality of second level selector stages and a plurality of third selector stages, each of said first level selector stages being connected to said first level bus, to respective bit lines, each second level selector stage, being connected to a plurality of outputs of the respective first level selector stage and to the second level bus, and each third level selector stage being connected a plurality of outputs of said respective second level selector stage and to the third level bus, and through an output to said multiplexer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A circuit comprising:
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a plurality of first decoder circuits each decoder circuit having an input coupled to an address bus and an output coupled to a first bus;
a plurality of first selection circuits, each first selection circuit having a plurality of inputs each input coupled to a bit line, a control input coupled to the first bus and an output;
a second decoder circuit having an input coupled to the address bus and an output coupled to a second bus; and
a plurality of second selection circuit, each second selection circuit having a plurality of inputs such that each input of the second selection circuit is coupled to the output of a first selection circuit of the plurality of first selection circuits, a control input coupled to the second bus and a plurality of outputs each output being a selected bit line coupled to an output data bus. - View Dependent Claims (22, 23)
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24. A column decoder circuit for page reading of a semiconductor memory, comprising:
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a first level decoder stage having an input connected to an address bus and an output connected to a first level bus;
a second level decoder stage having an input connected to said address bus and an output connected to a second level bus;
a third level decoder stage having an input connected to said address bus and an output connected to said third level selector stage through a third level bus;
a plurality of bit selection stages, each including a plurality of selection branches and a multiplexer, said selection branches being connected to respective inputs of said multiplexer and having a plurality of first level selector stages and a plurality of second level selector stages each of said first level selector stages being connected to said first level bus, to respective bit lines, and to a respective second level selector stage, each second level selector stage having a first addressing circuit for addressing a first group of bit lines;
a second addressing circuit for addressing a second group of bit lines, and a selection circuit for selecting one of said first and second groups of bit lines.
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Specification