Abstract: A planar Hall effect (PHE) sensor for measuring at an external magnetic field includes a plurality of elongated magnetic regions. Each magnetic region includes a ferromagnetic material that is magnetized along a longitudinal axis. The magnetic regions cross one another at an overlap region that is characterized by a plurality of easy magnetic axes. At least two pairs of electrical leads are each aligned along one of the easy magnetic axes. A current source may be connected to a first pair of the electrical leads to cause a current to flow through the overlap region along a first easy magnetic axis. A voltage measurement device may be connected to another pair of the electrical leads to measure a PHE voltage that is generated by a component of the external magnetic field that is perpendicular to the easy magnetic axis along which the overlap region is magnetized.

Abstract: Provided are an electronic device and a reverberation removal method therefor. The reverberation removal method for an electronic device comprises: a plurality of microphone units for receiving a user's voice; a reverberation removal unit removing a reverberation component of the user's voice received from the plurality of microphone units so as to acquire an original component of the user's voice; a reverberation information acquisition unit for acquiring information on the intensity of the reverberation component of the user's voice; and a post-processing unit for additionally removing a reverberation component from the original component acquired from the reverberation removal unit on the basis of the information on the intensity of the reverberation component.

Abstract: A three-phase current limiter (30) for an alternating current system includes an AC magnetic circuit having at least one AC coil (35R1, 35S1, 35T1) for each phase of a 3-phase AC supply wound on a saturable ferromagnetic core and configured to subject respective AC coils for each phase to a common magnetic flux, and a DC magnetic circuit (34a, 34b) for biasing the AC magnetic circuit into saturation at normal conditions. In use the AC coils are connected in series with a load and during alternate half cycles of the AC supply at least one of the AC coils produces a magnetic field that opposes a magnetic field of the DC magnetic circuit. The AC coils (35R, 35S, 35T) for each phase are configured so that at least one of the AC coils exhibits unbalanced magnetic impedance relative to remaining ones of the AC coils for each phase.

Abstract: A current limiting device (30, 40, 50, 60) comprising for each phase of an AC supply a closed magnetic core (31) of reduced volume and mass having first and second pairs of opposing limbs (32a, 32b; 33a, 33b), and at least one AC coil (35a, 35b) enclosing opposing limbs (33a, 33b) of the magnetic core (31) and adapted for series connection with a load. A non-superconducting DC bias coil (34) typically formed of copper encloses a limb (32a, 32b) of the magnetic core (31) for saturating each of the opposing limbs (33a, 33b) in opposite directions by the bias coil (34). Under fault conditions, the AC flux in at least one limb counteracts the DC bias flux, bringing the limb out of saturation. Preferably, current is reduced in the DC bias coils thus bringing both opposing limbs of the core out of saturation.