参数资料
型号: AG920-07
厂商: NVE Corp/Sensor Products
文件页数: 92/145页
文件大小: 0K
描述: KIT EVALUATION GT SENSOR
标准包装: 1
传感器类型: 磁性 GMR(大型磁阻传感)
接口: 模拟
嵌入式:
已供物品: 9 个板,CD,磁体,样品,焊膏
已用 IC / 零件: ABL 和 AKL 系列 GT 传感器
相关产品: 391-1058-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1057-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1056-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
391-1055-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
391-1036-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1035-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP
391-1034-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
391-1033-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP
其它名称: 391-1022
Application Notes
This confusing result is often seen when trying to detect very small magnetic fields such as the earth’s
field in magnetic compass applications or currency detection applications. The solution to this problem
is to bias the sensor element with an external magnetic field, so that the operating point of the sensor is
on the linear portion of the characteristic curve. This can be done either with an external permanent
magnet, or a current running near the sensor. Biasing the sensor with a positive external field from a
magnet or current will shift the sensor’s output characteristic as shown below:
Voltage
Output
- Applied Field
+ Applied Field
With this approach, a small applied field to the sensor will result in a bipolar output signal.
Furthermore, the slope of the signal characteristic will be the same no matter which curve the sensor is
operating on. So, the magnetic sensitivity of the device is the same, no matter how much hysteresis the
sensor has.
- 92 -
www.nve.com phone: 952-829-9217 fax: 952-829-9189
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