Ultra-low power temperature sensor design
AssigneeNortheastern University
InventorAatmesh Shrivastava
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Abstract
Methods, systems, and computer products are presented herein for determining temperature using ultra-low power temperature sensing systems. An ultra-low power (ULP) temperature sensing system comprises a proportional to absolute temperature (PTAT) current source, a switched-capacitor converter electrically coupled to the PTAT current source, and a ULP analog-to-digital converter (ADC) electrically coupled to the PTAT current source and the switched-capacitor converter. The PTAT current source is configured to generate a PTAT current that varies with an operating temperature. The switched-capacitor converter is configured to generate an analog voltage signal based on the PTAT current. The ULP ADC is configured to output a digital voltage value corresponding to the analog voltage signal.
Claims22
An ultra-low power (ULP) temperature sensing system, the system comprising:
- a proportional to absolute temperature (PTAT) current source, wherein the PTAT current source is configured to generate a PTAT current that varies with an operating temperature;
- a switched-capacitor converter electrically coupled to the PTAT current source, wherein the switched-capacitor converter is configured to generate an analog voltage signal based on the PTAT current;
- and
- a ULP analog-to-digital converter (ADC) electrically coupled to the PTAT current source and the switched-capacitor converter, wherein the ULP ADC is configured to output a digital voltage value corresponding to the analog voltage signal.
A method for temperature sensing, the method comprising:
- generating, by a proportional to absolute temperature (PTAT) current source, a PTAT current that varies with an operating temperature;
- generating, by a switched-capacitor converter electrically coupled to the PTAT current source, an analog voltage signal based on the PTAT current;
- and
- providing, by a ULP analog-to-digital converter (ADC) electrically coupled to the PTAT current source, a digital voltage value corresponding to the analog voltage signal.
Dependencies are inferred from the claim text.