A broadband current sensor, which is fully integrated and galvanically-isolated, is presented in this paper. The current sensor relies only on a Hall-effect probe to realize the magnetic sensing core so as to minimize the cost and the occupied space. Bandwidth limitations of state-of-the-art Hall-effect probes are overcame by combining the novel X-Hall architecture with a wide bandwidth differential-difference current-feedback amplifier. A prototype implemented in 0.16 μm BCD technology demonstrates a bandwidth wider than 20 MHz. Offset, sensitivity and power consumption are comparable to the state of the art. This is the first Hall-only current sensor achieving a bandwidth higher than 3 MHz.
A broadband current sensor based on the X-Hall architecture / Crescentini M.; Biondi M.; Ramilli R.; Traverso P.A.; Gibiino G.P.; Romani A.; Tartagni M.; Marchesi M.; Canegallo R.. - ELETTRONICO. - (2019), pp. 8964955.807-8964955.810. (Intervento presentato al convegno 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 tenutosi a Genova, Italia nel NOV 27-29, 2019) [10.1109/ICECS46596.2019.8964955].
A broadband current sensor based on the X-Hall architecture
Crescentini M.;Biondi M.;Ramilli R.;Traverso P. A.;Gibiino G. P.;Romani A.;Tartagni M.;
2019
Abstract
A broadband current sensor, which is fully integrated and galvanically-isolated, is presented in this paper. The current sensor relies only on a Hall-effect probe to realize the magnetic sensing core so as to minimize the cost and the occupied space. Bandwidth limitations of state-of-the-art Hall-effect probes are overcame by combining the novel X-Hall architecture with a wide bandwidth differential-difference current-feedback amplifier. A prototype implemented in 0.16 μm BCD technology demonstrates a bandwidth wider than 20 MHz. Offset, sensitivity and power consumption are comparable to the state of the art. This is the first Hall-only current sensor achieving a bandwidth higher than 3 MHz.File | Dimensione | Formato | |
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