Micro-power consumption temperature sensor

Abstract

The invention discloses a micro-power consumption temperature sensor. The micro-power consumption temperature sensor comprises a reference source, a first ring oscillator, a second ring oscillator and a calibration and counter module; the reference source is connected with the calibration and counter module through the first ring oscillator and the second ring oscillator. According to the micro-power consumption temperature sensor, oscillation frequency is changed by changing ring oscillator input voltage, and the novel micro-power consumption temperature sensor is obtained in the mode of combining a calibration circuit with a counter. According to the temperature sensor, by adjusting parameters of all tubes, the temperature sensor has a wider working range and has good linearity within the range; compared with a traditional temperature sensor, the circuit structure is simpler, the area is smaller, consumption is lower, and the micro-power consumption temperature sensor has great advantages in the field of passive wireless application.

Description

technical field [0001] The invention belongs to the technical field of wireless communication electronic circuits, and in particular relates to a micro-power consumption temperature sensor. Background technique [0002] Temperature is one of the most basic environmental parameters. People's lives are closely related to the temperature of the environment. Real-time temperature measurement is required in industrial production, and temperature measurement is also inseparable in agricultural production. Therefore, research on temperature measurement methods and devices is of great significance. The key device for measuring temperature is the temperature sensor. The development of temperature sensor has gone through three development stages: (1) traditional discrete temperature sensor; (2) analog integrated temperature sensor; (3) intelligent integrated temperature sensor. At present, new temperature sensors in the world are developing rapidly from analog to digital, from integr...

AI Technical Summary

Problems solved by technology

For some low-cost, micro-power consumption, wide operating range, and passive wireless fields, existing technologies are difficult to meet their needs

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