Sense circuit for memory storage system
AssigneeInternational Business Machines Corporation
InventorsKlaus Heuber, Wilfried Klein, Knut Najmann, Rolf Remshardt, Siegfried K. Wiedmann
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Abstract
This teaches a sense circuit for an integrated memory storage system in which the storage cell output is detected by a differential amplifier, controlling a flip-flop, serving as a latch, having load elements which also function as the load elements of the latch to ensure an optimum power and speed product. The latch can be coupled to an output driver circuit through a current switch which shares common elements with the latch to assure that the latch remains symmetrical even when used with an output driver having asymmetrical control.
Claims12
A sensing circuit comprising,
- a differential amplifier having means for receiving differential input signals and a pair of means for producing differential output signals,
- means for producing a latched operation coupled to said output signal producing means, said latched operation producing means including a first and second load element means, said first load element means coupled to one of said output signal producing means and said second load element means coupled to the other of said output signal producing means,
- first and second variable impedance feedback circuit means, each having a control element, said first variable impedance feedback circuit means being connected in parallel with said first load element means said second impedance feedback circuit means being connected in parallel with said second load element means and each of said control elements being coupled to and controlled by said latched operating producing means, and
- means for driving an output from said latched operation producing means.
A sensing circuit comprising
- a differential amplifier having a pair of means for receiving differential signals and having a pair of differential signal outputs,
- a latch, having a pair of inputs coupled to respective ones of said pair of differential signal outputs,
- a reference voltage,
- a pair of load elements connected between respective ones of said inputs and said reference voltage,
- a pair of feedback elements coupled to said latch, and each of said feedback elements is connected between a respective one of said differential amplifier outputs and said reference voltage, and
- output means coupled to said latch.
Dependencies are inferred from the claim text.