Monolithic Power Systems, Inc.

Sensima Technology Sa

Alstom Technology Limited

Ecole Polytechnique Federale De Lausanne

Chengdu Monolithic Power Systems Co., Ltd.

Lem Intellectual Property Sa

Mps Tech Switzerland Sarl

Serge Reymond

Pavel Kejik

Radivoje S Popovic

Roland Richard Moser

Tianzhu Zhang

Bernard Revaz

A position sensing system has a trim unit to trim hall voltages generated by a first sensor and a second sensor in response to an excitation current, to compensate a non-orthogonality of the first sensor and the second sensor.

Position sensing system with improved accuracy and the method thereof

A current sensing system uses a Hall effect device. A conductor carrying a target current is shaped in a way such that two regions with opposite magnetic field directions crossed there through are created at a silicon die which contains the Hall effect devices placed in a mirror way. The Hall effect devices react the magnetic field to generate a Hall voltage when a bias current is applied, which is then processed by a process circuit and an operational unit, so that a differential signal indicative of the target current is generated.

Current sensing system and current sensing method

A magnetic angular sensing system has a magnet magnetized radially and a magnetic angular sensor for sensing the angular position of the magnet. The magnetic angular sensor is mounted in parallel to the axis of the magnet and is non-coplanar with the magnet. The magnetic angular sensor senses an angular position of the magnet based on a detected axial magnetic field component and a tangential magnetic field component of the magnetic field vector where the sensor mounted. This invention provides a flexible sensing system.

Magnetic angular sensing system with side-shaft mounted sensor and the method thereof

A sensor for sensing an angular orientation of a magnet producing a magnetic field includes a sensing unit having N&#x2267;2 magnetic field sensing devices MFSD; a scanning circuit for repeatedly sequentially probing at least two of the MFSDs and concatenating signals outputted by the respective MFSDs for obtaining a magnetic signal; a magnet-signal output for outputting the magnetic signal; and a reference output for outputting a reference signal independent of the magnetic field. The sensor includes a first signal processing unit SPUand a second signal processing unit which are identically constructed, each having an input and an output; a phase detection unit PDU having a first input PDUand a second input PDU, for deriving phase differences between inputted signals, and for outputting a signal related to the angular orientation.

Angular orientation sensor and corresponding methods and devices

Integrated circuit Hall sensor system comprising a plurality of elementary blocks (EB), each elementary block including a Hall cell (), a differential pair () of an input stage of a Differential Difference Amplifier (DDA), and terminals (), wherein the terminals () are placed laterally on opposing outer sides of each elementary block parallel to a Y axis and the plurality of elementary blocks are arranged in a juxtaposed manner to form at least one row () extending along an X axis orthogonal to the Y axis and interconnected by the terminals.

Hall sensor system

A sensor for sensing an angular orientation of a magnetic field of a magnet includes: N&#x2267;2 Hall effect devices (HD, HD, . . . ), each having a detection direction and including a first and a second pair of connectors, wherein, in presence of the magnetic field, a flow of an electric current between the connectors of the first pair allows to pick up a Hall voltage between the connectors of the second pair induced by the magnetic field, unless a magnetic field component of the magnetic field along the detection direction is zero, wherein the N Hall effect devices are aligned such that they have a common detection direction lying along an axis; a filtering-or-resonating unit (F) comprising an input and an output, wherein a signal outputted from the output is referred to as filtered signal.

Hall-effect-based angular orientation sensor and corresponding methods and devices

A method for sensing an angular orientation of a magnetic field includes providing a set of N&#x2267;2 Hall effect devices, each having a detection direction and including two pairs of connectors; providing at least one band pass filter having a fundamental frequency f=1/Tf; providing at least one current source for outputting an electrical current at its output; applying, during a first time period of a duration 0.5 Tf and in a specific sequence of the N Hall effect devices, to each of the N Hall effect devices a respective wiring scheme Wi+, during respective subsequent time periods of durations ti; and applying, during a second time period of a duration 0.5 Tf, subsequent to the first time period of a duration 0.5 Tf, and in the same specific sequence of the N Hall effect devices, to each of the N Hall effect devices a respective wiring scheme Wi&#x2212;, during respective subsequent time periods of the same durations ti.

Hall-effect-based angular orientation sensor and corresponding method

In a method for determining geometrical characteristics (d) of an anomaly () which changes the electrical conductivity in the region near the surface of an electrically conducting, in particular a metallic test object (), a considerable simplification is achieved in that, in the region of the anomaly () in the test object (), eddy currents () of different frequencies are excited, and the magnetic field (B), which is produced by the excited eddy currents, is scanned in the vicinity of the anomaly () and the geometric characteristics of the anomaly are exclusively deduced from the distribution of the magnetic field (B).

Method for determining geometric characteristics of an anomaly in a test object and measuring apparatus for carrying out the method

A magnetic field sensor includes a sensing structure having a ring-shaped well, a plurality of contacts of equal size disposed along the ring-shaped well, a circuit having a plurality of electronic switches associated with the contacts of the sensing structure, a logic block for controlling the electronic switches, at least one current source, a voltage measuring device, a timing circuit providing a control signal for controlling the logic and providing a reference signal, wherein the logic block is configured to switch the switches under the control of the control signal so that a predetermined number of contacts of the plurality of contacts form a vertical Hall element supplied with current from the at least one current source and having two contacts connected to the voltage measuring device and circuitry configured to measure a phase shift between the reference signal and an output signal of the voltage measuring device.

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Geneva, Switzerland

Serge Reymond