CMOS integrated magnetic field source used as a reference in magnetic field sensors on common substrate

Trontelj, Janez; Trontelj, L.; Opara, Rok; Pleteršek, Anton

doi:10.1109/imtc.1994.351921

Cited by 9 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The principle basically consists in applying only a common mode magnetic field on the Hall devices. This is advantageously achieved with present sub-micron CMOS technologies that provide at least 3 metal layers and thus enable coil integration [3]- [11] upon each HHD with great precision (figure 9). Thanks to the small surface of the HHDs (26×50µm 2 ) and hence of the coils, a 2mT peak to peak (p-p) common mode field (B bal ) is obtained by injecting a 500Hz periodic current I coil =20mA p-p in the serially connected coils.…”

Section: Balancing Systemmentioning

confidence: 99%

Cmos microsystem for ac current measurement with galvanic isolation

Frick¹,

Hébrard²,

Poure³

et al. 2003

IEEE Sensors J.

View full text Add to dashboard Cite

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

show abstract

Section: Balancing Systemmentioning

confidence: 99%

Cmos microsystem for ac current measurement with galvanic isolation

Frick¹,

Hébrard²,

Poure³

et al. 2003

IEEE Sensors J.

View full text Add to dashboard Cite

show abstract

“…The close spacing of sensor die to current rail, packaging, soldering and moisture swelling of mould compound cause mechanical stress on sensor elements, which affects their gain drift in the order of 2 to 4%. Magnetic feedback could be used to compensate for it [1,2], but consumes relatively high compensation current for the coil. Analog compensation of mechanical stress effects [2] provides a good compensation at much lower additional current consumption, but guarantees optimization only at one temperature.…”

Section: Introductionmentioning

confidence: 99%

A miniature digital current sensor with differential Hall probes using enhanced chopping techniques and mechanical stress compensation

et al. 2012

View full text Add to dashboard Cite

A 10kHz bandwidth 50Amax current sensor using a Hall effect gradiometer without magnetic core provides 80kHz update rate with a digital interface. Very low un-calibrated offset of 30mA (1σ) and after calibration typical 10mA over temperature is accomplished by a chopped multi-bit feedback continuous-time 3rd order ΔΣ-ADC. This also realizes low noise of 13mA rms in 1kHz signal bandwidth. The ADC uses enhanced chopping techniques and additional digital feedback loops to avoid chopper ripple. New analog and digital stresscompensation circuits with lateral and vertical n-doped resistors achieve lifetime gain drifts below 1% and temperature compensation. Auto-zeroing ping-pong comparators offer a fast over-current detection of 1...2µs on a dedicated output pin. The monolithic integrated sensor chip and the 4kV galvanic isolated current rail fit into a very small 7x7x1mm 3 package.

show abstract