The X-Hall Sensor: Toward Integrated Broadband Current Sensing

This article presents the X-Hall sensor, a viable sensing architecture for implementing silicon-integrated, broadband, current/magnetic sensor. The sensor overcomes bandwidth limit of state-of-the-art Hall sensors by replacing spinning-current technique with dc-biased-based passive offset compensation. In this way, removes methodological due to and allows exploiting probe up its practical limit, which is set parasitic capacitive effects. Moreover, pushing at higher frequencies both removal switches inherent in approach specially designed analog front end. To end, differential-difference current-feedback amplifier (DDCFA) proposed as an end A prototype implemented bipolar-CMOS- DMOS (BCD) 0.16-?m silicon technology experimentally assess performance architecture. compensation into frequency-independent preserves adequate reduction performance, though less efficient than operated low frequency. Experimental dynamic tests on identify presence additive perturbation package that prevents from fully limit. However, implementation postdeemphasis digital filter us mitigate achieve 4 MHz, broadest ever demonstrated purely Hall-effect based