A kind of temperature sensing circuit and temperature sensor

Abstract

A temperature sensing circuit and a temperature sensor. The temperature sensing circuit (21) comprises a first branch and a second branch, wherein the first branch and the second branch are respectively provided with at least one sampling point (1-8), the sampling points (1-8) are used for outputting a voltage signal, and the difference value between two voltage signals is used to characterize the temperature of an environment in which the temperature sensing circuit (21) is located. The temperature sensor (2) comprises the temperature sensing circuit (21), which is used for generating and outputting a voltage signal according to the temperature of an environment in which the temperature sensor (2) is located, an ADC conversion module (22), which is used for converting the voltage signal into a digital signal, and a processing module (23), which is used for processing the digital signal output by the ADC conversion module (22) and outputting a temperature value. By improving an output signal of a temperature sensing circuit, the intensity of an analogue signal output thereby is increased, thereby omitting an amplifier of a digital circuit part, and solving the problem in the prior art that an amplifier needs to be arranged in a digital circuit part of a temperature sensor.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a temperature sensing circuit and a temperature sensor for converting ambient temperature into a temperature value. Background technique [0002] Temperature sensors are widely used in measurement, control and other instruments and equipment, and the working principle of the integrated temperature sensor as the main member of the temperature sensor is to use the temperature characteristics of the triode. When the currents of the two sets of triodes are different, their bases - There is a difference in the emitter voltage, which has an approximately linear relationship with the temperature, so the current temperature value can be measured by accurately monitoring the magnitude of the difference voltage. [0003] figure 1 It is a schematic diagram of a temperature sensor in the prior art (patent number is the accompanying drawing in US20010009495A1), by figure 1 It can be seen ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a temperature-sensing circuit and a temperature sensor, which solves the problem of complex signal output of the temperature-sensing circuit in the temperature sensor in the prior art

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