Knowledge about hall sensor |
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Hall
sensor is a kind of magnetic sensor,we can use it to detect the magnetic field
and it's changes.And it can be used in many occasions which are related to
magnetic field.
1.
Hall effect
As
shown in figure 1,connect both ends of Semiconductor wafer with control
current, impose with uniform magnetic field which magnetic strength is Bin the vertical direction of
Semiconductor wafer,so in the vertical direction of the current and magnetic
field,it will generate Hall voltage which the electric potential difference is UH.
d=thickness of Semiconductor wafer ,k=hall
coefficient ,which is affected by the material of wafer.
2. Hall Component
According
to Hall effect, people make the component with semiconductor materials is named
as hall component.It has advantages of sensitive to magnetic field,simple
structure,small in size,wide frequency response,big output voltage change,long
service life and so on.So it has wide application in.
For the measurement,automation,computer,information
technology and other fields.
3.Hall sensor
Due to the electric potential difference generated
by the Hall component is small,generally the Hall component is integrated on a
chip with electronic amplifier,temperature-compensation circuit, stabilized
voltage power circuit and so on.So it is called Hall sensor.
Hall sensor is also called as Hall integrated
circuit,and its size is small.
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