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US 2008/0290929 A1Published application
Proximity detection system and method
AssigneeAnalog Devices, Inc.
InventorsJohn O'Dowd, Michal Brychta
Life of this patent
Estimating the term…
Abstract
Proximity detection is accomplished by determining with a moving average calculation a moving average level of input data; setting a threshold level in response to the average level and a sensitivity factor; producing a proximity detection output when the input data meets the threshold level; and changing the weighting used by the average level calculation in response to a proximity detection output.
Claims23
A proximity detection system comprising:
- a moving average calculation circuit responsive to input data to determine a moving average level of that data;
- a threshold circuit responsive to said average level and a sensitivity factor for setting a threshold level;
- a comparator device for producing a proximity detection output when said input data meets said threshold level;
- and a background average level adjustment circuit for changing the weighting used in the average level calculation in response to a proximity detection output.
1 more element
A proximity detection system comprising:
- a moving average calculation circuit responsive to input data to determine a moving average level of that data;
- a threshold circuit responsive to said average level and a sensitivity factor for setting a threshold level;
- a comparator device for producing a proximity detection output when said input data meets said threshold level;
- and a reset timer circuit for resetting said average level when said data level has been above said average level for a first predetermined time and/or when said average level has been above said data level for a second predetermined time.
1 more element
A proximity detection system comprising:
- a moving average calculation circuit responsive to input data to determine a moving average level of that data;
- a threshold circuit responsive to said average level and a sensitivity factor for setting a threshold level;
- a comparator device for producing a proximity detection output when said input data meets said threshold level;
- and a background average level adjustment circuit for changing the weighting used by the average level calculation in response to a proximity detection output;
- and a reset timer circuit for resetting said average level when said data level has been above said average level for a first predetermined time and/or when said average level has been above said data level for a second predetermined time.
2 more elements
A proximity detection method comprising:
- determining with a moving average calculation a moving average level of input data;
- setting a threshold level in response to said average level and a sensitivity factor;
- producing a proximity detection output when said input data meets said threshold level;
- and changing the weighting used by the average level calculation in response to a proximity detection output.
1 more element
A proximity detection method comprising:
- determining with a moving average calculation a moving average level of input data;
- setting a threshold level responsive to said average level and a sensitivity factor;
- producing a proximity detection output when said input data meets said threshold level;
- and resetting said average level when said data level has been above said average level for a first predetermined time and/or when said average level has been above said data level for a second predetermined time.
1 more element
Dependencies are inferred from the claim text.