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公开(公告)号：US11080592B2
公开(公告)日：2021-08-03
申请号：US15725320
申请日：2017-10-05
摘要： A neuromorphic architecture for a spiking neural network comprising a plurality of spiking neurons, each with a plurality of synapses and corresponding synaptic weights, the architecture further comprising a synaptic competition mechanism in connection with a spike-based learning mechanism based on spikes perceived behind a synapse, in which architecture synapses of different neurons connected to the same input compete for that input and based on the result of that competition, each neuron of the neural network develops an individual perception of the presented input spikes, the perception used by the learning mechanism to adjust the synaptic weights.
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公开(公告)号：US10657997B2
公开(公告)日：2020-05-19
申请号：US16398030
申请日：2019-04-29
发明人： Kevin B. Judd , Simeon Furrer , Angeliki Pantazi , Mark A. Lantz
摘要： A method according to one embodiment includes applying a static head skew to a magnetic tape head, positioning the first reader at a first y-position relative to a servo pattern in a servo band, and measuring y-positions of the second reader relative to the servo pattern in the servo band while the first reader is at the first y-position. A y-position value is calculated for the second reader based on the measured y-positions. The following process is repeated several times: moving the first reader to a next y-position, measuring y-positions of the second reader while the first reader is at the next y-position, and calculating a y-position value of the second reader based on the measured y-position of the second reader. A unique nonlinearity value of the servo pattern in the servo band is calculated for each of the calculated y-position values of the second reader.
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公开(公告)号：US20190272464A1
公开(公告)日：2019-09-05
申请号：US16388121
申请日：2019-04-18
发明人： Evangelos S. Eleftheriou , Lukas Kull , Manuel Le Gallo-Bourdeau , Angeliki Pantazi , Abu Sebastian , Tomas Tuma
摘要： Artificial neuron apparatus includes first and second resistive memory cells. The first resistive memory cell is connected in first circuitry having a first input and output. The second resistive memory cell is connected in second circuitry having a second input and output. The first and second circuitry are operable in alternating read and write phases to apply a programming current to their respective memory cells on receipt of excitatory and inhibitory neuron input signals, respectively. During the write phase, resistance of the respective cells is changed in response to successive excitatory and inhibitory neuron input signals. During the read phase, a read current is applied to their respective cells to produce first and second measurement signals, respectively. An output circuit connected to the first and second outputs produces a neuron output signal at a neuron output when a difference between the first and second measurement signals traverses a threshold.
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公开(公告)号：US10366716B1
公开(公告)日：2019-07-30
申请号：US16044396
申请日：2018-07-24
发明人： Kevin B. Judd , Simeon Furrer , Angeliki Pantazi , Mark A. Lantz
摘要： In one general embodiment, a method includes applying a static head skew to a magnetic tape head, positioning the first reader at a first y-position relative to a servo pattern in a servo band, measuring y-positions of the second reader relative to the servo pattern in the servo band while the first reader is at the first y-position, and averaging the measured y-positions. The method further includes repeating the following process several times: moving the first reader to a next y-position, measuring y-positions of the second reader while the first reader is at the next y-position, and averaging the y-positions measured by the second reader while the first reader is at the next y-position. The method further includes calculating a unique nonlinearity value of the servo pattern in the servo band for each of the average y-position values, and storing and/or outputting the calculated nonlinearity values.
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公开(公告)号：US10268949B2
公开(公告)日：2019-04-23
申请号：US15075314
申请日：2016-03-21
发明人： Evangelos S. Eleftheriou , Lukas Kull , Angeliki Pantazi , Abu Sebastian , Milos Stanisavljevic , Tomas Tuma
摘要： Artificial neuron apparatus includes a resistive memory cell connected in an input circuit having a neuron input, for receiving neuron input signals, and a current source for supplying a read current to the cell. The input circuit is selectively configurable in response to a set of control signals, defining alternating read and write phases of operation, to apply the read current to the cell during the read phase and to apply a programming current to the cell, for programming cell resistance, on receipt of a neuron input signal during the write phase. The cell resistance is progressively changed from a first state to a second state in response to successive neuron input signals. The apparatus further includes an output circuit comprising a neuron output and a digital latch which is connected to the input circuit for receiving a measurement signal dependent on cell resistance.
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公开(公告)号：US20190057301A1
公开(公告)日：2019-02-21
申请号：US15680140
申请日：2017-08-17
摘要： Neuromorphic processing apparatus is provided. The present invention may include a spiking neural network comprising a set of input spiking neurons each connected to each of a set of output spiking neurons via a respective synapse for storing a synaptic weight which is adjusted for that synapse in dependence on network operation in a learning mode of the apparatus, and each synapse is operable to provide a post-synaptic signal, dependent on its synaptic weight, to its respective output neuron. The present invention may further include a pre-processor unit adapted to process input data, defining a pattern of data points, to produce a first set of input spike signals which encode values representing respective data points, and a second set of input spike signals which encode values complementary to respective said values representing data points, and to supply the input spike signals to respective predetermined input neurons of the network.
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公开(公告)号：US20180374508A1
公开(公告)日：2018-12-27
申请号：US15631033
申请日：2017-06-23
CPC分类号： G11B15/43 , G11B15/32 , G11B15/46 , G11B15/48 , G11B2220/90
摘要： Embodiments of the present invention provide a tape transport control system with enhanced regulation of tape tension and velocity over the entire length of the tape. The tape transport control system comprises of circuitry adapted to output and circuitry adapted to receive one or more signals representing a tape velocity, at least one radius of either the first tape reel or the second tape reel, and a tape tension, and based on the received signals, generate at least one control signal to control at least one of the first reel motor or the second reel motor so as to reduce a tension disturbance at a minimum, one frequency corresponding to a time-varying reel-rotation frequency, based on controller parameters that depend on the tape velocity and on the at least one radius of either the first tape reel or the second tape reel.
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公开(公告)号：US09990580B2
公开(公告)日：2018-06-05
申请号：US14657628
申请日：2015-03-13
CPC分类号： G06N3/0635 , G06N3/049 , G06N3/063 , G06N3/08 , G11C11/54 , G11C11/5678 , G11C13/0004 , G11C13/004 , G11C13/0069 , G11C2013/0092
摘要： Neuromorphic synapse apparatus 11 comprises a memelement 20 for storing a synaptic weight, and programming logic 21. The memelement 20 is adapted to exhibit a desired programming characteristic. The programming logic 21 is responsive to a stimulus prompting update of the synaptic weight for generating a programming signal for programming the memelement 20 to update said weight. The programming logic 21 may be responsive to an input signal indicating an input weight-change value ΔWi, and may be adapted to generate a programming signal dependent on the input weight-change value ΔWi. The programming logic 21 is adapted such that the programming signals exploit the programming characteristic of the memelement 20 to provide a desired weight-dependent synaptic update efficacy.
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公开(公告)号：US09964419B2
公开(公告)日：2018-05-08
申请号：US15407353
申请日：2017-01-17
发明人： Angeliki Pantazi , Abu Sebastian , Tomas Tuma
CPC分类号： G01D5/16 , G01B7/003 , G01D5/145 , G01R33/09 , G01R33/091 , G11B5/39 , G11B5/3903 , G11B5/3932
摘要： A sensor arrangement for position sensing comprises a magnetic field source and a magnetoresistive element arranged in a magnetic field generated by the magnetic field source, which magnetoresistive element provides an output signal (R) dependent on a position (x) of the magnetoresistive element relative to the magnetic field source. A feedback controller is configured to receive the output signal (R) of the magnetoresistive element and is configured to adjust one or more of the position (x) of the magnetoresistive element relative to the magnetic field source and a strength of the magnetic field generated by the magnetic field source acting on the magnetoresistive element dependent on the output signal (R) of the magnetoresistive element.
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公开(公告)号：US20170270404A1
公开(公告)日：2017-09-21
申请号：US15075314
申请日：2016-03-21
发明人： Evangelos S. Eleftheriou , Lukas Kull , Angeliki Pantazi , Abu Sebastian , Milos Stanisavljevic , Tomas Tuma
IPC分类号： G06N3/063
CPC分类号： G06N3/0635 , G06N3/049
摘要： Artificial neuron apparatus includes a resistive memory cell connected in an input circuit having a neuron input, for receiving neuron input signals, and a current source for supplying a read current to the cell. The input circuit is selectively configurable in response to a set of control signals, defining alternating read and write phases of operation, to apply the read current to the cell during the read phase and to apply a programming current to the cell, for programming cell resistance, on receipt of a neuron input signal during the write phase. The cell resistance is progressively changed from a first state to a second state in response to successive neuron input signals. The apparatus further includes an output circuit comprising a neuron output and a digital latch which is connected to the input circuit for receiving a measurement signal dependent on cell resistance.
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