Recalibration Systems and Techniques for Electronic Memory Applications
AssigneeQUALCOMM Incorporated
InventorsAshwin Raghunathan, Marzio Pedrali-Noy
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Abstract
A memory circuit includes a delay module receiving a strobe signal and producing a delayed strobe signal therefrom. The memory circuit also includes a calibration module that initiates recalibration of the delay module when the calibration module discerns that the delayed strobe signal is within a predetermined proximity of an edge of a reference signal. The memory circuit can be included in a memory interface. Furthermore, in some embodiments, a strobe signal can be used as the reference signal.
Claims23
A memory interface circuit comprising:
- a delay module receiving a strobe signal and producing a delayed strobe signal therefrom;
- and
- a calibration module that initiates recalibration of the delay module when the calibration module discerns that the delayed strobe signal is within a predetermined proximity of an edge of a reference signal.
The memory interface circuit of 7 in which the calibration module includes a second plurality of latching elements that are replicas of the first plurality of latching elements.
A method for use in a memory interface circuit that includes a strobe delay component, the method comprising:
- discerning a position of a delayed strobe signal relative to a reference signal;
- and
- in response to discerning that the delayed strobe signal is within a predetermined proximity of the reference signal, initiating a recalibration of the strobe delay component.
A memory interface module comprising:
- means for receiving a strobe signal and producing a delayed strobe signal therefrom;
- and
- means for initiating recalibration of the delay producing means when it is discerned that the delayed strobe signal is within a predetermined proximity of an edge of a reference signal.
A method for use in a memory interface circuit that includes a strobe delay component, the method comprising the steps of:
- discerning a position of a delayed strobe signal relative to a reference signal;
- and
- in response to discerning that the delayed strobe signal is within a predetermined proximity of the reference signal, initiating a recalibration of the strobe delay component.
Dependencies are inferred from the claim text.