SAR logic circuit applied to temperature sensor

A temperature sensor and logic circuit technology, which is applied to the parts of thermometers, thermometers, applications of thermometers, etc., can solve the problem that the temperature measurement range of the temperature sensor is not large enough

Active Publication Date: 2022-03-01
NANJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 me...

Method used

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  • SAR logic circuit applied to temperature sensor
  • SAR logic circuit applied to temperature sensor
  • SAR logic circuit applied to temperature sensor

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Embodiment Construction

[0023] Such as figure 1 As shown, a SAR logic circuit applied to a temperature sensor is composed of three TSPC register arrays. The first TSPC register array outputs signals CTRL11-CTRL0 and CTRLOUT under the set clock signal, and outputs signals CTRL11-CTRL0 as the sampling clock The signal is input into the second TSPC register array, the output signal CTRLOUT is input into the third TSPC register array as the sampling clock signal, the input signal of the second TSPC register array is the output signal IN of the comparator, and the signal IN is sequentially output according to the sampling clock signal to obtain the output Signals D11-D0, under the same clock signal CTRLOUT, the third TSPC register array outputs signals D11-D0 in parallel to obtain output signals OUT11-OUT0.

[0024] Such as figure 2As shown, the register works internally as follows. The TSPC register arrays are all composed of cascaded TSPC registers. In the first TSPC register array, there are 13 reg...

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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...

Claims

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Application Information

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IPC IPC(8): G01K1/00G01K13/00H03M1/46
CPCG01K1/00G01K13/00H03M1/462Y02D10/00
Inventor 刘依桦张翼高昊刘雅琴庄宇航姚佳飞张瑛蔡志匡肖建郭宇锋
Owner NANJING UNIV OF POSTS & TELECOMM
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