Inventors:
- Zug, CH
Sasa Dimitrijevic - Nis, RS
Karron Louis Law - Cheney WA, US
Radivoje Popovic - Zug, CH
Ian James Walker - Woodside CA, US
International Classification:
G01R 33/04
G01R 33/09
G01R 33/07
Abstract:
The invention concerns a magnetic transducer comprising a magnetic field sensor and an electronic circuit. The electronic circuit comprises at least one current source, a transformer, a fully differential preamplifier coupled to the transformer, a phase sensitive detector coupled to the preamplifier and a logic block configured to operate the magnetic field sensor(s) to provide an AC output voltage. The magnetic field sensor(s) is preferably either a Hall element or an AMR sensor or a fluxgate sensor. The invention further concerns a current transducer for measuring a current flowing through a cable, comprising at least one such magnetic transducer and a head with one or more ferromagnetic cores optimized to reduce the effects of external magnetic fields.