Patent ID: 11927493
Assignee: NXP B.V.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 19:
20. The temperature sensing method of claim 19,
wherein the first plurality of currents comprises a first current and a second current that is different from the first current,
wherein when the switching circuit operates in a first state of the plurality of states, (i) the first current passes through the sensing element, and the sensing elements outputs a first CTAT voltage and a third current based on the first current, and (ii) the third current passes through the load, and a first load voltage is generated across the load,
wherein when the switching circuit operates in a second state of the plurality of states, the first current passes through the load, and a second load voltage is generated across the load,
wherein when the switching circuit operates in a third state of the plurality of states, (i) the second current passes through the sensing element, and the sensing elements outputs a second CTAT voltage and a fourth current based on the second current, and (ii) the fourth current passes through the load, and a third load voltage is generated across the load,
wherein when the switching circuit operates in a fourth state of the plurality of states, the second current passes through the load, and a fourth load voltage is generated across the load,
wherein the plurality of CTAT voltages comprises the first CTAT voltage and the second CTAT voltage, the second plurality of currents comprises the third current and the fourth current, and the plurality of load voltages comprises the first load voltage, the second load voltage, the third load voltage, and the fourth load voltage, and
wherein the temperature value is generated based on (i) the current density ratio and (ii) a difference between the second CTAT voltage and the first CTAT voltage.