38results about "Pulse generation by galvano-magnetic devices" patented technology

A magneto-sensitive integrated circuit which amplifies a magneto-sensitive output voltage of a Hall element by an amplifier to generate an amplified voltage, converts an output voltage of the amplifier into a digital signal by an A / D converter; and generates a reference voltage of magnitude corresponding to an indicated value. The amplifier includes voltage superposition means which superposes a DC voltage corresponding to the reference voltage on the amplified voltage to generate the output voltage of the amplifier.

A device, system and method for adaptively tracking amplitude boundary values of a real time sensor output signal. In accordance with the method of the present invention, an amplitude boundary value, which may be a peak or min amplitude value, representing the current amplitude boundary of the sensor output signal is stored within a digital counter. A two-tap DAC is utilized to convert the digitally stored amplitude boundary value into a reference signal level corresponding in amplitude to the amplitude boundary value. The DAC also converts the amplitude boundary value into an offset reference signal level corresponding in amplitude to the amplitude boundary value offset by a specified multiple of the DAC resolution. The reference signal level and offset reference signal are compared with the real time sensor signal and the digitally stored amplitude boundary value is adjusted in accordance with which reference signal level exceeds the real time sensor signal.

A method (500), a handheld electronic device (102) and an external accessory (402) for controlling at least one function of a plurality of functions of the handheld electronic device is provided. The method includes determining (504) whether the handheld electronic device is docked in an external accessory. Further, the method includes measuring (506) a first magnetic field density when the handheld electronic device is docked in the external accessory. Furthermore, the method includes generating (508) a signal to activate at least one function, based on an electrical parameter.

An integrated circuit that does not involve increase in power consumption or decrease in switching probability that occur when a latch circuit using STT-MTJ device, etc. of the prior art is operated at high speed is provided. The integrated circuit 1 includes: a memory element 1B where write occurs when a specified period τ has elapsed after a write signal is input; and a basic circuit element 1A, which is an elementary device constituting a circuit and has a data retaining function, and characterized in that an operation frequency f1 in a first operation mode in the process of information processing of the basic circuit element 1A satisfies the following relation:τ>λ1 / f1(0<λ1≦1).

An electronic circuit includes a plurality of sensing elements configured to generate a plurality of sensing element signals. The electronic circuit also includes a control signal generator configured to generate a plurality of control signals. The electronic circuit also includes a combining circuit. The combining circuit includes a plurality of switching circuits. Each switching circuit is configured to generate a respective switching circuit output signal being representative of either a non-inverted or an inverted respective one of the plurality of sensing element signals depending upon the first state or the second state of a respective one of the plurality of control signals. The combining circuit also includes a summing circuit coupled to receive the switching circuit output and configured to generate a summed output signal corresponding to a sum of the switching circuit output signals.

A method (500), a handheld electronic device (102) and an external accessory (402) for controlling at least one function of a plurality of functions of the handheld electronic device is provided. The method includes determining (504) whether the handheld electronic device is docked in an external accessory. Further, the method includes measuring (506) a first magnetic field density when the handheld electronic device is docked in the external accessory. Furthermore, the method includes generating (508) a signal to activate at least one function, based on an electrical parameter.

A sensor for measuring a parameter includes at least one transducer adapted to provide an analog transducer signal, and at least one converter adapted to convert the analog transducer signal into a digitized transducer signal, and a memory device associated with the converter capable of receiving the digitized transducer signal directly from the converter. The memory device is configured to provide a digitized output value from a memory location, the memory location being associated with or corresponding to the digitized transducer signal received by the memory device.

A magnetic field sensor including an amplifier and a magnetic field element for outputting a signal to a switch circuit according to the strength of an applied magnetic field. The switch circuit outputs a signal selected by an external two-phase signal to an amplifier that amplifies the signal and outputs a resulting voltage to a first end of a memory element. A switch, having one end connected to a second end of the memory element, is controlled by the two-phase signal. The switch closes in a first phase of the two-phase signal causing the memory element to store the output voltage of the amplifier, and opens in a second phase causing a vector sum of the output voltage the amplifier to be stored in the memory element and providing the output voltage to a signal output terminal connected to the second end of the memory element.

A current sensor includes a semiconductor substrate, a ring shaped magnetic core having a center opening and a gap and provided to a surface of the substrate, and a Hall element provided to the surface and placed in the gap of the magnetic core such that a control current for operating the Hall element flows perpendicular to the surface of the substrate. The magnetic core and the Hall element are formed to the substrate by semiconductor manufacturing techniques. Therefore, the Hall element can be placed in the gap to be accurately positioned with respect to the magnetic core and the gap can have a reduced separation distance. Thus, the current sensor can have an increased sensitivity and accurately measure a current to be detected.

Clock signals are distributed on a chip by applying an oscillating magnetic field to the chip. Local clock generation circuits including magnetic field sensors are distributed around the chip and are coupled to local clocked circuitry on the chip. The magnetic field sensors may include clock magnetic tunnel junctions (MTJs) in which a magnetic orientation of the free layer is free to rotate in the free layer plane in response to the applied magnetic field. The MTJ resistance alternates between a high resistance value and a low resistance value as the free layer magnetization rotates. Clock generation circuitry coupled to the clock MTJs senses voltage oscillations caused by the alternating resistance of the clock MTJs. The clock generation circuitry includes amplifiers, which convert the sensed voltage into local clock signals.

A sensor circuit includes a sensor element, a current source for supplying an operating current for the sensor element and an amplifier circuit for amplifying a sensor voltage produced by the sensor element when applying the operating current, wherein the amplifier circuit has a resistor influencing the amplification of it. The resistor of the amplifier current and the sensor element are formed equally as regards technology so that variations, due to technology, of the sensor sensitivity of the sensor element are counteracted by an amplification factor of the amplifier circuit changing in the opposite way.

A current sensor includes a semiconductor substrate, a ring shaped magnetic core having a center opening and a gap and provided to a surface of the substrate, and a Hall element provided to the surface and placed in the gap of the magnetic core such that a control current for operating the Hall element flows perpendicular to the surface of the substrate. The magnetic core and the Hall element are formed to the substrate by semiconductor manufacturing techniques. Therefore, the Hall element can be placed in the gap to be accurately positioned with respect to the magnetic core and the gap can have a reduced separation distance. Thus, the current sensor can have an increased sensitivity and accurately measure a current to be detected.

A shock detector, such as for disk drives, which eliminates discrete external capacitors used in prior art devices. A first stage operational amplifier (without external capacitors) provides part of the gain required. This is followed by a second stage switched capacitor high pass filter (without external capacitors) that provides the remaining gain required while filtering out the DC offset of the first stage operational amplifier. In order to cover the range of frequencies expected without aliasing problems, two switched capacitor high pass filters in parallel are used, each designed with a different cut-off frequency.

The invention provides a magnetoelectric data trigger triggered by a magnetic field and an implementation method thereof. The magnetoelectric data trigger comprises three layers of magnetoelectric heterojunctions and copper coils uniformly wound on the peripheries of the heterojunctions, and magnetic field pulse trigger signals are provided by electromagnets applied to two ends of the rectangularmagnetoelectric heterojunctions. Magnetization of different degrees is generated by controlling a bias magnetic field to induce a magnetostriction phase through the magnetoelectric effect, so that thedynamic magnetomechanical strain of the magnetoelectric heterojunctions is regulated and controlled, and the output voltage maintaining and converting functions are achieved by changing the directionand residual magnetism occurring in the bias magnetic field under the excitation of an alternating magnetic field. Therefore, the ferroelectric layers of the magnetoelectric heterojunctions generatenonvolatile voltage and cause the change of the output high / low level state, thereby realizing the tracking and maintaining functions of classic data triggering. Compared with a traditional D trigger,the magnetoelectric data trigger has the remarkable advantages of being low in loss, quick in response, simple in wiring and the like, and can replace the traditional D trigger and be applied to a modern digital system.

The invention discloses a high-temperature plasma gas superconducting electromagnetic coil and a microwave pulse generation device. The superconducting electromagnetic coil comprises an insulating outer body, wherein an electromagnetic coil, an electric detonator and explosive are packaged in the insulating outer body; the electromagnetic coil is wound to be spiral from a tubular electric conductor; the tubular electric conductor is in a vacuum state and is filled with mercury; two ends of an inner hole of the tubular electric conductor are welded and sealed; the explosive and the electric detonator are filled in a voltage cathode expansion body; and a gas-guide hole is formed in the insulating outer body at the end, away from the electric detonator, of the voltage cathode expansion body. The electromagnetic coil is wound to be spiral from the tubular electric conductor, the tubular electric conductor is sealed and vacuumized and is filled with mercury, the mercury inside the electric conductor is gasified instantly to form the high-temperature plasma gas superconducting electromagnetic coil under the effects of high voltage and strong current during electrification, and an ultrastrong electromagnetic field is generated; and therefore, current leading to a virtual cathode microwave generator can be improved conveniently, and ultrastrong microwave pulse waves are generated.

An electric power supply system for a Hall effect electric thruster. The Hall effect electric thruster includes an anode, a cathode, a heater for the cathode and an igniter. The electric power supply system includes a first power supply source to power the anode, a second power supply source to power the heater and a power supply unit to electrically supply the igniter. The power supply unit includes a third power supply source and a passive electric circuit. The third power supply source powers the passive electric circuit and is configured to generate a voltage in the form of at least one pulse.

The invention discloses a multi-turn LTD pulse generator which mainly comprises a resistor RL, M diodes Di, M switching tubes Qi and M LTD modules. The high-voltage pulse generator is small in size, all-solid-state and high in repetition frequency, and the rising time and the falling time of pulses, the pulse width and the pulse amplitude can be flexibly adjusted.

A pulse generator comprises a mounting to hold two bodies in proximity to each other. Two magnetic elements may be movably placed in the mounting, and the magnetic elements will align with each other in one of two stable states. A coil surrounds the magnetic elements in the mounting, and a force application device applies a force to the first magnetic element to cause the first magnetic element to break the current alignment and thereby make the first and second magnetic elements realign to the other stable state. The movement of the magnets generates a pulse in the coil which may be detected by suitable circuitry and used. The device may be used inter alia to count rotations or linear movements, or to provide switching or remote control without the need for a separate power source.

The invention discloses a magnetic switch pulse generator for electric pulse rock breaking. The magnetic switch pulse generator comprises a power supply, a rectifying and filtering module, an energy storage module, a switch module, a transformer, a pre-breakdown module, a magnetic switch module and a load, wherein the power supply charges the whole pulse generator, and the rectifying and filtering module rectifies and filters voltage waveforms input by the power supply; the switch module adjusts the discharge frequency of the pulse generator; voltage is boosted through the transformer, the pre-breakdown module continues to boost, and a load channel is punctured by rising edge steepening instantaneous high-pulse voltage; the energy storage module stores energy, and after the pre-breakdown module breaks down the load, the magnetic switch module controls the pre-breakdown module to inject instantaneous pulse energy into the load; and the magnetic switch module has the function of isolating high voltage and high current at the two ends of the load. The system can be flexibly selected and designed according to load types, and has the advantages of high portability, high rock breaking energy consumption efficiency and the like.