Wireless Internet-of-Things chip integrated with Hall effect detector, and method of integrating Hall effect detector

Abstract

The invention relates to a wireless Internet-of-Things chip integrated with a Hall effect detector, and a method of integrating a Hall effect detector. Inside the same Internet-of-Things chip, a Hall element, a voltage amplifier, an analog-to-digital converter and a control logic module are in circuit connection in sequence. The Hall element outputs a voltage corresponding to a magnetic field where the Hall element is positioned. After the voltage output by the Hall element is amplified by the voltage amplifier, the voltage is converted by the analog-to-digital converter into a digital signal of the voltage through sampling quantification. The control logic module outputs, according to a result of acquisition of the digital signal of the voltage, an instruction of a relationship between the magnetic field corresponding to the Hall element and a detected physical quantity. The output voltage of the counter-rotating Hall element is utilized to eliminate the influence of a mismatch voltage, and the thermal noise inside the chip is eliminated by increasing the sampling capacitance of the analog-to-digital converter and also by obtaining an average value through many times of sampling.

Description

technical field [0001] The invention relates to the field of the Internet of Things (IOT), in particular to a technology integrating a Hall Effect Sensor in a wireless Internet of Things chip device. Background technique [0002] The Hall Effect refers to a current carrier placed in a magnetic field, in which the carriers are affected by the Lorentz Force (Lorentz Force), which will generate a voltage perpendicular to the direction of the current and the magnetic field. The magnitude is proportional to the product of the magnitude of the current and the strength of the magnetic field. Hall Effect Sensor refers to the use of the principle of the Hall Effect to detect the magnitude and direction of the magnetic field. Although the Hall effect detector is a magnetic field detector, it can detect temperature, pressure, position, flow, etc. with it as the core component, and has a wide range of applications. [0003] Hall effect detector is mainly composed of two parts: Hall el...

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Problems solved by technology

[0005] The disadvantages of these two methods are obvious: the Hall effect detector is included in the system cost, which cannot be minimized; the Hall effect detector needs to occupy additional PCB board space, and the volume of the IoT device will not be too small; the IoT chip needs The extra pins are connected to the Hall effect detector, which affects the expansion of other functions of the IoT chip; the Hall effect detector is separated from the IoT control chip, which is not convenient for the latter to control it, and the power consumption of the system cannot be reduced. to optimal

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