SAR logic circuit applied to temperature sensor

Abstract

The invention provides an SAR (Synthetic Aperture Radar) logic circuit applied to a temperature sensor with a large temperature measurement range, the temperature sensor comprises a temperature sensing circuit and an SAR ADC (Analog to Digital Converter) circuit, and the SAR logic circuit is a constituent part of the SAR ADC circuit; the SAR logic circuit comprises three TSPC register arrays, the register arrays are connected through signal transmission, and each register array is formed by cascading TSPC registers; the TSPC register structure comprises a TSPCR and a level recovery loop, the signal competition problem can be solved, and therefore the working temperature range of the circuit is improved. The working temperature range of the SAR logic circuit is improved, the working temperature range is expanded to-150 DEG C to 200 DEG C, and when the SAR logic circuit is applied to a temperature sensor, the temperature measurement range of the temperature sensor can be expanded.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a SAR logic circuit applied to a temperature sensor with a large temperature measurement range. Background technique [0002] The temperature sensor is a device used for temperature measurement, and its application range is very wide, involving agriculture, medical treatment, electronic devices, etc.; the temperature sensor can be composed of a temperature sensing circuit and a SAR ADC (Successive Approximation Analog-to-Digital Converter) circuit, and the SAR ADC circuit The accuracy of the temperature sensor has an important impact on the accuracy. The SAR logic circuit is one of the modules of the SAR ADC circuit. Its operating temperature range will limit the maximum temperature that the temperature sensor can measure, so its performance requirements have also increased. [0003] At present, for the temperature sensor whose structure is roughly a temperature sens...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, aiming at the problem that the temperature measurement range of the traditional temperature sensor is not large enough, the present invention provides a SAR logic circuit applied to a temperature sensor with a large temperature measurement range, which meets the index requirements of a temperature sensor with a large temperature measurement range, It can work normally at high temperature, and complete the temperature measurement function together with other modules, and expand the temperature measurement range to -150°C—+200°C

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