A Broadband, On-Chip Sensor Based on Hall Effect for Current Measurements in Smart Power Circuits

Crescentini, Marco; Marchesi, M.; Romani, Annalisa; Tartagni, Marco; Traverso, Pier Andrea

doi:10.1109/tim.2018.2795248

Cited by 62 publications

(64 citation statements)

References 44 publications

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“…Figure 5(d) shows the input-referred noise spectrum which is flat up to 1 MHz with a root mean square value of 70 mA rms , leading to an effective resolution of 6.4 bit. The main parameters characterizing the AFE are summarized in Table I for comparison with state-of-the-art current sensors, while a more detailed characterization of the AFE can be found in [38].…”

Section: Implementation Resultsmentioning

confidence: 99%

“…To achieve the target Nyquist bandwidth B W = 1 MHz, a main clock speed of 32 MHz was selected. This relationship between clock frequency and Nyquist bandwidth can be exploited to trade-off bandwidth for resolution [38] but does not affect the power consumption of the sensing cores.…”

Section: A Current Sensing Coresmentioning

confidence: 99%

“…On the other hand, the analog bandwidth of the Hall-effect probe is defined by the capacitive load seen by the probe, which is primarily given by the input load of the AFE [39]- [42]. To achieve the target bandwidth, an AFE with reduced input capacitance was implemented [38]. The architecture of the AFE is shown in Figure 3.…”

Section: A Current Sensing Coresmentioning

confidence: 99%

“…where G 2 is the gain of the third stage. A more detailed description of the Hall-effect probe and the AFE can be found in [11], [38]. The conditioned Hall voltages from the two sensor cores are digitized by two ADCs, one for each core.…”

Section: A Current Sensing Coresmentioning

confidence: 99%

See 3 more Smart Citations

A Broadband Multi-Mode Compressive Sensing Current Sensor SoC in 0.16<inline-formula> <tex-math notation="LaTeX">$\mu$ </tex-math> </inline-formula>m CMOS

Bellasi

Crescentini

Cristaudo

et al. 2019

IEEE Trans. Circuits Syst. I

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Broadband current sensors are key components in numerous applications including power conversion, motor control, and smart-metering. We present a compressive sensing (CS) current sensor system-on-chip (SoC) designed and fabricated in STM 0.16 µm BCD technology. The SoC is capable of measuring currents with amplitudes of up to 10 A peak with a sensing bandwidth of 1 MHz. Two broadband current sensing cores, each consisting of a Hall-effect probe, an AFE, and a 2 MS/s 9-bit ADC, are monolithically integrated together with a digital multi-mode compressive sensing encoder (DCSE) for data-rate reduction. We focus on the evaluation of CS as data compression codec for current sensing applications and on the details of the DCSE architecture designed for general purpose use. We introduce multi-block decoding that is a decoding modality to improve the reconstruction quality of "off-grid sparse" signals commonly occurring in practice. Moreover, we provide measurements of both the compression performance and power consumption of the SoC employed in two exemplary real-world applications; namely, sparse current sensing, and electrical appliance detection for non-intrusive load monitoring based on compressive measurements.

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Section: Implementation Resultsmentioning

confidence: 99%

Section: A Current Sensing Coresmentioning

confidence: 99%

Section: A Current Sensing Coresmentioning

confidence: 99%

Section: A Current Sensing Coresmentioning

confidence: 99%

See 2 more Smart Citations

A Broadband Multi-Mode Compressive Sensing Current Sensor SoC in 0.16<inline-formula> <tex-math notation="LaTeX">$\mu$ </tex-math> </inline-formula>m CMOS

Bellasi

Crescentini

Cristaudo

et al. 2019

IEEE Trans. Circuits Syst. I

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“…Measurements of electric current at multiple points are required for modern applications such as smart grids [1], smart buildings, power conversion and electric drives [2], [3], and the car industry. Even if the measured current is at powerline frequency, it often contains a DC component and higher harmonics.…”

Section: Introductionmentioning

confidence: 99%

Contactless measurement of electric current using magnetic sensors

Ripka

2019

Tm - Technisches Messen

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We review recent advances in magnetic sensors for DC/AC current transducers, especially novel AMR sensors and integrated fluxgates, and we make critical comparison of their properties. Most contactless electric current transducers use magnetic cores to concentrate the flux generated by the measured current and to shield the sensor against external magnetic fields. In order to achieve this, the magnetic core should be massive. We present coreless current transducers which are lightweight, linear and free of hysteresis and remanence. We also show how to suppress their weak point: crosstalk from external currents and magnetic fields.

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