Geomagnetic sensors are used to measure the Earth’s magnetic field to

provide absolute reference and heading. But a large challenge is the

changing magnetic fields that temporarily distort the heading

information, such as metal parts in furniture, a passing car, or nearby

cell phones and computers. Compensating for these and other transient

magnetic anomalies requires the geomagnetic sensor to be able to

precisely distinguish between sensor noise (“blur”) and real changes in

magnetic field. PNI’s geomagnetic sensors lead the field in their

ability to reduce blur to establish the true magnetic field,

outperforming other magnetic sensors by orders of magnitude.

Additionally, PNI’s Geomagnetic Sensors are simple to design in, and

the peak current requirement is dramatically less than Hall Effect

sensors. It isn’t surprising this patented technology has been proven

across a wide spectrum of applications, including motion tracking,

compassing, game control, TV and set-top box controllers, and magnetic

field measurement.

PNI磁传感器的优点

数字输出。PNI磁传感器的ASIC芯片可直接输出与磁场大小相关的数字信号，不像其他模拟信号输出的产品，需要额外的放大器和模数转换器等硬件。

高分辨率，分辨率可达10NT。其他同类的产品很难做到，或要花费相对高昂的代价才能实现。

低功耗。传感器的功耗与采样率有关，如当采样率为8Hz时，传感器的功耗在1.5mW左右，300Hz时，功耗在7.5mW。而一般的MR（磁阻）传感器的功耗普遍在15mW到30mW。

温度性能好，无磁滞效应。传感器的正/反向电压驱动的设计原理，从根本上杜绝了磁滞效应的影响。而传感器由于温度影响而带来的输出误差，也在正负方向上相互抵消。