Sense amplifier with time dependent sensitivity
First Claim
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1. An integrated circuit memory comprising:
- a plurality of memory cells; and
a sense amplifier having first and second inputs, at least one of which is connectable through a bit line to at least one of said plurality of memory cells, for producing an output dependent on an input voltage difference between a cell voltage on that one of said first and second inputs connected to a selected memory cell and a reference trip-point voltage on the other of said first and second inputs;
characterized in that;
said reference trip-point voltage is controlled by time-dependent voltage control means to change over a predetermined time period from a first reference trip-point voltage after equilibration of said first and second inputs to a second reference trip-point voltage.
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Abstract
A dynamic RAM integrated circuit has improved resistance to soft errors caused by alpha particles by changing the trip-point voltage of the sense amplifier from a first value that provides resistance to bit line errors to a second, lower value that provides resistance to cell errors.
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Citations
4 Claims
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1. An integrated circuit memory comprising:
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a plurality of memory cells; and a sense amplifier having first and second inputs, at least one of which is connectable through a bit line to at least one of said plurality of memory cells, for producing an output dependent on an input voltage difference between a cell voltage on that one of said first and second inputs connected to a selected memory cell and a reference trip-point voltage on the other of said first and second inputs;
characterized in that;said reference trip-point voltage is controlled by time-dependent voltage control means to change over a predetermined time period from a first reference trip-point voltage after equilibration of said first and second inputs to a second reference trip-point voltage. - View Dependent Claims (2, 3, 4)
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Specification