Method and apparatus for calibrating a sensor
AssigneeIntel Corporation
InventorMatthais EBERLEIN
Life of this patent
Estimating the term…
Abstract
Described is a current-mode thermal sensor with calibration apparatus which comprises: a first transistor with a gate terminal coupled to a first node; a second transistor with a gate terminal coupled to a second node; a first resistor coupled to the first and second nodes; a second resistor coupled to the first node and a supply node; a diode coupled to the second node and the supply node; a third resistor coupled to the second node; and a switch coupled to the third resistor and a reference supply.
Claims31
An apparatus comprising:
- a first transistor with a gate terminal coupled to a first node;
- a second transistor with a gate terminal coupled to a second node;
- a first resistor coupled to the first and second nodes;
- a second resistor coupled to the first node and a supply node;
- a diode coupled to the second node and the supply node;
- a third resistor coupled to the second node;
- and
- a switch coupled to the third resistor and a reference supply.
-9. (canceled)
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-18. (canceled)
A method for calibrating an apparatus, the method comprising:
- determining a first digital code representing two unknown parameters by turning off a switch;
- turning on the switch to couple a node to a known voltage reference to add known current to the node;
- determining a second digital code representing the two unknown parameters when the switch is turned on;
- computing to determine a value of at least one of the unknown parameters using the known voltage, and the first and second digital code;
- and
- calibrating the apparatus for the computed parameter.
-30. (canceled)
A method comprising:
- determining a first digital code representing ‘N’ number of unknown parameters;
- coupling “N-1” number of different reference signals to a processing core by performing “N-1” separate measurement operations;
- determining another “N-1” digital codes representing the ‘N’ unknown parameters;
- computing to determine a value of at least one of the ‘N’ unknown parameters using the known “N-1” reference signals, and “N” number of digital codes;
- and
- calibrating an apparatus, having the processing core, for the computed value of the at least one of the ‘N’ unknown parameter, where ‘N’ is an integer.
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Dependencies are inferred from the claim text.