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US 10,256,817 B2Granted
Methods and systems for averaging impedance calibration
AssigneeMicron Technology, Inc.
InventorDean D. Gans
Life of this patent
Estimating the term…
Abstract
A semiconductor device also includes programmable termination components and a calibration circuit. The calibration circuit generates impedance calibration codes. The calibration circuit also calibrates impedance of the programmable termination components based on an average impedance calibration code of the impedance calibration codes. The semiconductor device further includes an averaging circuit that determines the average impedance calibration code of the impedance calibration codes.
Claims22
A semiconductor device comprising:
- one or more programmable termination components;
- a calibration circuit configured to:
- generate a plurality of impedance calibration codes based on a periodic supply voltage signal;
- and
- calibrate impedance of the one or more programmable termination components based on an average impedance calibration code of the plurality of impedance calibration codes;
- and
- an averaging circuit configured to determine the average impedance calibration code of the plurality of impedance calibration codes.
4 more elements
A system comprising:
- a controller;
- a semiconductor device communicatively coupled to the controller, wherein the semiconductor device comprises:
- one or more programmable termination components;
- a calibration circuit configured to:
- generate a plurality of impedance calibration codes based on a periodic supply voltage signal in response to receiving a command signal from the controller;
- and
- calibrate impedance of the one or more programmable termination components based on an average impedance calibration code of the plurality of impedance calibration codes;
- and
- an averaging circuit configured to determine the average impedance calibration code of the plurality of impedance calibration codes.
6 more elements
A method, comprising:
- receiving a number of multiple impedance calibrations to perform and a period of the multiple impedance calibrations;
- generating an impedance calibration code;
- determining a sum of impedance calibration codes by summing the impedance calibration code with any previous impedance calibration codes based on a periodic supply voltage signal;
- determining an average impedance calibration code based on the sum of impedance calibration codes and the number of multiple impedance calibrations to perform;
- and
- calibrating one or more programmable termination components based on the average impedance calibration code.
3 more elements
Dependencies are inferred from the claim text.