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Temperature to Digital Converter

A temperature sensor and capacitor technology, applied in thermometers, instruments, scientific instruments, etc., can solve the problem of temperature sensor accuracy reduction

Active Publication Date: 2021-03-30
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bipolar Transistor-Based Temperature Sensors Decrease in Accuracy with Increased Technology Scaling to Reduce Circuit Component Size

Method used

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  • Temperature to Digital Converter
  • Temperature to Digital Converter
  • Temperature to Digital Converter

Examples

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Embodiment Construction

[0026] It should be understood that the drawings are only schematic and not drawn to scale. It should also be understood that the same reference numbers are used throughout the drawings to refer to the same or similar parts.

[0027] The description and drawings illustrate the principles of various example embodiments. It will thus be appreciated that those skilled in the art will be able to devise various arrangements which, although not explicitly described or shown herein, embody the principles of the invention and are included within its scope. In addition, all examples described herein are mainly intended to be used explicitly for teaching purposes to assist readers in understanding the principles of the present invention and the concepts provided by the inventors to deepen the field, and all examples should not be construed as being limited to such specific Examples and conditions described. Additionally, as used herein, the term "or" means a non-exclusive or (ie, and / ...

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PUM

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Abstract

The invention discloses an integrated circuit temperature sensor. The integrated circuit temperature sensor comprises: a first capacitor having a first capacitance related to temperature; a second capacitor having a temperature related to the temperature. an associated second capacitance; and a controller configured to determine a ratio of the first capacitance to the second capacitance in order to determine a temperature of a region of the integrated circuit.

Description

technical field [0001] Embodiments described herein include an integrated circuit capacitor temperature sensor. Background technique [0002] Most temperature sensors used in integrated circuits are bipolar based. To read from a bipolar device, use a bias circuit to run a continuous current through the bipolar device for proper setting and read out V be voltage, the V be The voltage is temperature dependent, which allows the temperature to be determined. For accurate temperature readout, the V between two bipolar transistors with different bias currents can be measured less dependent on process scaling. be Voltage difference. Thus, it is only necessary that the current ratio between the two branches of the bipolar transistor be precise. As technology scaling increases to reduce the size of circuit elements, the accuracy of bipolar transistor-based temperature sensors decreases. [0003] Using a capacitor as the temperature sensing element instead of a bipolar transisto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/34
CPCG01K7/34G01K7/343
Inventor 贝里·A·J·巴特
Owner NXP BV