Not all current sensors are the same
Ashi Microdevices used PCIM to explain its high-speed coreless current sensors. They use III-V compounds (typically InAs or InSn) rather than silicon because of the higher mobility available, about 50x that of silicon, which provides for a much higher signal-to-noise in the output. Compared to silicon-based current sensors, the resulting devices need less amplification of their output, respond more quickly, and can work with lower magnetic fields. Because they also don’t use a core of magnetic material, there is no hysteresis to worry about and they can be physically smaller. At the booth, Ashi also demonstrated its AK09970 3D magnetic sensor which is applicable to applications such as smart locks, tablets, and augmented reality. The demo can be viewed below.
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