Current-mode sensing structure used in high-density multiple-port register in logic processing and method for the same
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United States of America Patent
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Jan 29, 2008
Grant Date -
Dec 6, 2007
app pub date -
May 31, 2006
filing date -
May 31, 2006
priority date (Note) -
Expired
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Abstract
A current-mode sensing structure used in a high-density multiple-port register in logic processing and a method for the same are proposed. First, a reference current is defined by a dummy word line of a dummy cell and output. A multiple-port register file cell is then used to send out a select signal of '0' or '1' and output a cell current according to the select signal and the reference current. Finally, the cell current and the reference current are sent to a current comparator amplifier, which senses and outputs a difference value between the cell current and the reference current to perform session at once (SAO) recording. Because the difference value has only two possibilities: the reference current or its negative, the sensing time of the current comparator amplifier can be shortened.
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