Temperature and voltage sensor, chip and electronic equipment

Abstract

The invention provides a temperature and voltage sensor, a chip and an electronic device, the temperature and voltage sensor comprises an analog-to-digital conversion module and a reference voltage generation module which are integrated in the same chip, and the reference voltage generation module can provide a plurality of reference voltages. And the analog-to-digital conversion module can receive a mode control signal for selecting a voltage sensor mode or a temperature sensor mode, and performs corresponding operation processing on the voltage input signal and the plurality of reference voltages to obtain required temperature information or voltage information. According to the invention, a band-gap reference circuit and an off-chip reference voltage source are not needed, the reference voltage generation module in the chip can be directly utilized to provide a plurality of reference voltages for the analog-to-digital conversion module in the chip, and mode configuration is carried out on the analog-to-digital conversion module through the mode control signal. Finally, the same sensor can realize two modes of a temperature sensor and a voltage sensor, the chip area can be saved, the power consumption and the cost are reduced, and the measurement precision is improved.

Description

technical field [0001] The invention relates to the technical field of sensor design, in particular to a temperature and voltage sensor, a chip and electronic equipment. Background technique [0002] With the progress of the chip manufacturing process, the chip is developing in the direction of smaller size and lower power supply voltage. The thermal effect of the chip has gradually been put on the research agenda. In order to prevent the chip from overheating and negatively affect the performance of the chip, it is necessary to integrate a temperature sensor inside the chip to monitor the chip temperature in real time. [0003] At present, there are mainly the following ways to integrate the temperature sensor inside the chip: [0004] One is to use a thermistor to realize it. Although this method is more general, its accuracy is limited. [0005] The second is to generate a voltage reference through a bandgap reference circuit, and quantify a voltage representing temper...

AI Technical Summary

Problems solved by technology

This method has the following defects: (1) it will increase the cost due to the setting of the bandgap reference circuit, etc., and consume more chip area, and bring larger power consumption; (2) because the bandgap reference circuit Manufacturing random deviations will cause large errors in the temperature sensor and low precision. Therefore, for some high-precision applications, the chip needs to be equipped with an additional reference voltage source outside the chip, which will increase the cost.

This method is similar to the above-mentioned second method of integrating the temperature sensor in the chip, but it also has the disadvantages of low precision, high cost, and high power consumption.

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