参数资料
型号: 12217
厂商: NVE Corp/Sensor Products
文件页数: 110/145页
文件大小: 0K
描述: MAGNET 3.5MM DIA X 4MM THICK
标准包装: 10
系列: *
其它名称: Q7078272A
Application Notes
The following series of drawings shows a biased GT Sensor. The drawings show how the magnetic
field generated by the bias magnet is influenced by the moving gear tooth, and how the output signal
appears at four equally spaced positions between adjacent gear teeth:
Direction of Sensitivity
GMR Sensor
Resistors R3, R4
Magnet
GMR Sensor
Resistors R1, R2
Voltage Output of
GMR Bridge
Rotation
GMR Sensor
Resistors R3, R4
Magnet
GMR Sensor
Resistors R1, R2
Voltage Output of
GMR Bridge
Rotation
GMR Sensor
Resistors R3, R4
Magnet
GMR Sensor
Resistors R1, R2
Voltage Output of
GMR Bridge
Rotation
GMR Sensor
Resistors R3,
Magnet
GMR Sensor
Resistors R1, R2
Voltage Output of
GMR Bridge
R4
Rotation
Despite the simplicity of the preceding drawings, magnetically biasing a gear tooth for a production
product can be complex. Typically, the position of the sensor relative to the magnet is fixed, but there
is a variation in the airgap between the sensor and the target gear tooth. This can lead to magnetic
conditions that can cause an unstable output.
- 110 -
www.nve.com phone: 952-829-9217 fax: 952-829-9189
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