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7391201 |
Regulated analog switch
Circuits and methods to achieve a regulated analog switch being capable to provide an output-voltage not exceeding a defined limit are disclosed. In a preferred embodiment a car battery provides a...
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6316124 |
Modified InAs hall elements
This invention pertains to more sensitive and more stable electronic devices which can sense electrical and magnetic fields. The devices are characterized by InAs channels confined on both sides...
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6291907 |
Magnetically coupled signal isolator using a faraday shielded MR or GMR receiving element
An isolator having a driver circuit which responsive to an input signal drives appropriate signals into one or more coils which are magnetically coupled to one or more corresponding MR or GMR...
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6201318 |
Headlight warning system
A headlight warning system incorporates an engine running sensor and a headlight sensor coupled to a control circuit for activating a warning device, such as a buzzer, when the headlights have been...
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6154027 |
Monolithic magnetic sensor having externally adjustable temperature compensation
The current flow from a temperature-variable current source to a Hall-effect element is adjusted according to sensed temperature conditions of the element to compensate for temperature-dependent...
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6040688 |
Electrical current supply device with incorporated electrical current sensor
A current supply device for supplying a direct current, a sinusoidal current or a pulsed current to a load, the device having a conductor portion arranged for being connected in series with the...
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5698909 |
Multi-function switch
A multi-function switch includes a casing, a key top member, two magnets, two magnetic detectors and a micro-computer. The key top member is mounted on the casing to permit both liner movement and...
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5686827 |
Temperature compensated Hall effect device
An apparatus includes a Hall effect device which generates an electrical output signal upon exposure to a magnetic field. An operating current for the Hall effect device is varied by input...
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5512818 |
Voltage proportional replication device using magnetoresistive sensing elements
In accordance with the present invention, a voltage proportional replication device comprises an input electromagnet responsive to an input voltage for producing a magnetic field in proportion to...
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5486804 |
Integrated magnetoresistive sensor fabrication method and apparatus
A magnetoresistor is monolithically integrated with an active circuit by growing a thin film magnetoresistor on a semiconductor substrate after the substrate has been doped and annealed for the...
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5264783 |
Contactless magnet-activated proportional controller
An electrical power controller includes an integrated circuit having a Hall element, a Hall voltage amplifier, a ramp signal generator, and a voltage comparator. The output of the ramp generator is...
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5075605 |
Inner-rotor commutation device
A brushless DC motor includes a rotor having an iron core affixed to a motor shaft. Permanent magnets are affixed to the core and separated by aluminum inserts which are keyed to the core. An...
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5055768 |
Temperature compensator for hall effect circuit
A resistor formed in the same epitaxial layer of semiconductor material in which a Hall element is formed is used to provide a temperature dependent voltage source which is inversely proportional...
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4994731 |
Two wire and multiple output Hall-effect sensor
A device for sensing the speed of a rotating element in a vehicle replaces the practice of using magnetic wire coil pickup devices placed in close proximity to a rotating element, such as a gear....
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4931719 |
Hall-effect sensor arrangement
A Hall-effect magnetic sensor arrangement comprises a sensor element utilizing the Hall-effect and disposed in a magnetic circuit including a magnetic pole unit in an opposing relationship with...
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4914376 |
Actuation device for an electrical appliance
The invention is directed to an actuation device for an electrical appliance, in particular for small electrical appliances such as tooth-brushes, oral jet devices, hair dryers, curling irons,...
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4734594 |
Offset correction for sensor with temperature dependent sensitivity
A Hall effect device with offset compensation in which the output terminals of a Hall effect element formed in an epitaxial layer are connected to a differential current source. The sum of first...
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4698522 |
Structure for Hall device for compensation of first and second order voltage offsets
A Hall device is formed from a generally rectangular body of material exhibiting the Hall effect, with two excitation electrodes disposed along opposite edges of the device. Two Hall output voltage...
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4634961 |
Method and circuit for the temperature compensation of a hall element
A circuit for providing temperature compensation to a Hall element is disclosed. The temperature compensation circuit is used to generate control signals which act on the effective thickness of the...
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4593241 |
Hall generator circuit with temperature compensation
A temperature compensating circuit for a Hall generator with a positive temperature coefficient of the resistance of the drive circuit path utilizes summation of a voltage representing the drive...
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4521727 |
Hall effect circuit with temperature compensation
A temperature compensation method and circuit for a Hall element or other element with similar characteristics comprising a pair of current carrying branches, one of which includes a resistor. A...
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4464625 |
Magnetoresistive current detector
In a magnetoresistive current detector, which includes a conductor carrying a current to be measured, which in turn generates an external magnetic field, four bridge elements are connected to one...
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4443716 |
Symmetrical-hysteresis Hall switch
A magnet is bonded to a skewed-hysteresis Hall switch in such a position that the magnetic flux, normal to the Hall element, is equal to the average of the magnetic flux required to operate and the...
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4441072 |
Multiple input output electrical isolation for use with electronic integrated circuits
A plurality of electrical isolation devices are provided on a monolithic integrated circuit. Each of the isolation devices includes a current strap and a magnetic field sensor. The current strap is...
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4398342 |
Method of making a Hall effect device
A Hall effect device comprises a thin substrate free epitaxially grown semiconductor body mounted in a magnetically permeable, e.g. ferrite, housing. The layer, which is preferably gallium arsenide...
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4394619 |
Hall probe with automatic connecting means
A device for measuring the current amplitude in busbars and other current feeders to the electrodes of a cell for the electrorefining of copper, comprises a Hall generator which can be set with a...
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4374333 |
Two terminal Hall-sensor
An integrated circuit includes a Hall-element, a voltage regulator, and a threshold detector. DC power is supplied through a pair of terminals that may be connected to a remote DC voltage source. A...
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4322708 |
Electromagnetic device utilizing a pair of magnetically activated electronic switches
An electromagnetic device utilizing a pair of Hall effect switches for detecting the presence or absence of an electrical current of a first and a second value. The device includes a flux generator...
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4322709 |
Adjustable flux generator a magnetically activated electronic switch
An adjustable flux generator used in conjunction with a Hall effect switch, comprising a coil and a magnetic circuit including an adjustable core. The coil produces a field of magnetic flux in...
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4318074 |
Contactless electromagnetic relay
A contactless electromagnetic relay employing at least two magnetically activated electronic switches comprising a coil for generating a field of magnetic flux in response to an electrical current...
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4311981 |
Magnetic switch
An electric switch magnetically activatable including a Hall Effect sensor with a permanent magnet fixed on one side of the sensor and magnetic shielding interposed between the sensor and fixed...
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4307617 |
Indicating and control apparatus utilizing Hall effect elements
An indicating and control apparatus uses Hall effect elements arranged on one side of a non-magnetic wall separating the elements from selectively positionable respective magnets. The magnets are...
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4296410 |
Two-state Hall element proximity sensor device with lamp indicator
An integrated circuit including a Hall element and a threshold detector is encased in a plastic housing with the plane of the Hall element parallel with a face of the housing, providing a two-state...
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4293837 |
Hall effect potentiometer
A Hall effect sensor is disposed between two magnets having their fields in quadrature and in association with a movable specially formed ferromagnetic part which is used to control flux in the...
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4283643 |
Hall sensing apparatus
A Hall sensing apparatus having a large dynamic range is adapted for generating a current signal substantially in phase with the current in a conductor. The Hall sensing apparatus has a magnetic...
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4262275 |
Hall effect apparatus for flux concentrator assembly therefor
A Hall effect package structure is provided with a cap which carries integral reference plane establishing members for establishing the gap between the facing ends of two elongated flux...
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4251795 |
Semiconductor magnetoresistive element having a differential effect
A semiconductor magnetoresistive element with at least one intermediate terminal comprises first and second electrodes formed at opposite ends of a magnetosensitive portion of the semiconductor...
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4176305 |
Galvano magnetic position control system
A magneto resistor whose resistance is a function of its position with respect to an external magnetic field is disclosed as a source of position feedback information which may be utilized in a...
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4137512 |
Contactless magnetic switch
A contactless magnetic switch is provided by utilizing at least one pair of hollow elongated tubular magnetic sensing elements which are each threaded with at least one sense wire and a movable...
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4125821 |
Potentiometer providing a non-linear output
A potentiometer which is generally similar to those potentiometers incorporating a pair of magnetic resistance effect elements and providing a linear output, but which produces a non-linear output...
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4041371 |
Arrangement for the generation of electrical signals by means of magnetic field-dependent semiconductor components
In an arrangement for generating electrical signals by means of two magnetic field-dependent resistors (i.e., field plates) each comprised of a semiconductor compound and each arranged on a...
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4037150 |
Method of and apparatus for eliminating the effect of non-equipotentiality voltage on the hall voltage
A method of eliminating the effect of non-equipotentiality voltage on the Hall voltage based on the non-reciprocal behavior of a Hall generator whereby a Hall generator or cascade-connected Hall...
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4006402 |
Device for remote transmitting pressure signals
Device for remote transmitting pressure signals, of the type comprising a chamber delimited by a pressure-sensitive flexible membrane and in communication with the fluid, the pressure of which has...
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3949290 |
Instrument transformer with cone-shaped insulating layer
An instrument transformer being applicable for a current transformer and/or a voltage transformer which is comprised of a coil for developing magnetic field related to a primary current, the Hall...
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3691502 |
SEMICONDUCTOR TYPE POTENTIOMETER DEVICE
Various improvements of a semiconductor type potentiometer device comprising one or more three electrode semiconductor elements each having two end electrodes and an intermediate electrode provided...
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3684997 |
HALL EFFECT DEVICE HAVING AN OUTPUT VOLTAGE OF THE NTH POWER CHARACTERISTICS WITH MAGNETIC INDUCTION
In the disclosed Hall effect devices a Hall generator section energized by a source has a second Hall generator section formed by elongating the first section at the location of the output...
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3671854 |
CONTACTLESS GALUANO-MAGNETRO EFFECT APPARATUS
A contactless galvano-magnetro effect apparatus comprised of a magneto resistance effect device which is provided with a plurality of electrodes, between which a plurality of resistance yokes are...
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3671874 |
CONTACTLESS ROTARY SWITCHING APPARATUS
A contactless rotary switching apparatus comprised of a disc-shaped fixed yoke which is stationary and a rotary yoke arranged in parallel with each other, a magnet positioned between the yokes, the...
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3553498 |
MAGNETORESISTANCE ELEMENT
A magnetoresistance element with a control electrode which allows a control voltage to vary the electrical characteristics is disclosed. A semiconductor material of intrinsic property is provided...
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3462673 |
TEMPERATURE-COMPENSATED MAGNETICALLY VARIABLE POTENTIOMETER
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