Low-power-consumption improved band-gap reference temperature reading circuit

Abstract

The invention relates to the technical field of sensor design and application, and provides a low-power-consumption improved band-gap reference temperature reading circuit which comprises an analog-to-digital conversion circuit and a band-gap reference circuit which are electrically connected with each other, and the band-gap reference circuit comprises a target voltage generation circuit and an operational amplifier. The target voltage generation circuit comprises a first triode, a second triode, a third triode, a fourth triode, a first resistor, a second resistor, a third resistor and a fourth resistor. The negative input end of the operational amplifier is connected with a first node, the positive input end is connected with a second node, and the output end is connected with a fourth node; and the upper ends of the third resistor and the fourth resistor are connected with power supply voltage, and the lower ends are respectively connected with the first node and the second node. The temperature reading efficiency can be improved, and the power consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of sensor design and application, in particular to a low-power consumption improved bandgap reference temperature readout circuit. Background technique [0002] Modern mobile devices are increasingly developed, and the requirements for the power consumption of various sensors are becoming more and more stringent. As temperature is the most important physical parameter on mobile devices, temperature sensors with low power consumption are becoming more and more popular. For example, the high temperature early warning detection of the circuit board, the battery overtemperature protection, and the spacecraft’s high-precision temperature detection all require the cooperation of relatively low-power and high-precision temperature sensors. At this stage, most temperature sensors only generate analog signals related to temperature. On the basis of improving the accuracy, it is the future development direction to fur...

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the technical problems of large power consumption and low efficiency of the temperature sensor in the prior art, and proposes a low power consumption improved bandgap reference temperature readout circuit to achieve the purpose of improving the efficiency of temperature reading and reducing power consumption

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