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公开(公告)号：US12052025B2
公开(公告)日：2024-07-30
申请号：US18077949
申请日：2022-12-08
发明人： A. Martin Mallinson
IPC分类号： H03M1/00 , G06F5/01 , G06F7/02 , H03F3/04 , H03F3/183 , H03F3/45 , H03G3/00 , H03K5/24 , H03M1/34 , H03M1/36 , H03M1/06
CPC分类号： H03M1/002 , G06F5/01 , G06F7/02 , H03F3/04 , H03F3/183 , H03F3/45089 , H03F3/45475 , H03G3/001 , H03K5/24 , H03M1/34 , H03M1/365 , H03F2203/45528 , H03M1/0682
摘要： An apparatus and method for processing signals in the analog domain. A signal is derived from analog circuit properties that is shift and scale invariant. Although the circuit properties are not quantized as in traditional digital signal processing, the signal is immune from effects of the properties, such as common mode noise, absolute voltage or current level, finite settling time, etc., as a digital signal would be. The shift and scale invariance allows for mathematical operations of addition, subtraction, multiplication and division of signals. By combining these operations, various circuits may be constructed, including a voltage controlled amplifier, a time gain amplifier, and an analog-to-digital converter. The circuits are constructed using almost no non-linear, active devices, and will thus use less power for a given speed than comparable digital devices, and will often be faster as there are no delay elements and no need to wait for the circuit properties to settle.
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公开(公告)号：US11514302B2
公开(公告)日：2022-11-29
申请号：US16806264
申请日：2020-03-02
发明人： A. Martin Mallinson
摘要： A programmable impedance element consists of a plurality of nominally identical two-port elements, each two-port element having an impedance element and two switches, the two-port elements arranged in a chain fashion with a structured set of switches such that a range of impedances can be obtained from each cell by dynamically changing the connections between the impedance elements in the cell. The common cell is constructed by connecting the nominally identical two-port impedance elements in a way that the number of possible combinations of the impedance elements is reduced to the subset of all possible combinations that uses the minimum possible number of connections. This structure allows the creation of matched impedances using industry standard devices. The connections between impedance elements are switches that may be “field-programmable,” i.e., that may be set on the chip after manufacture and configured during operation of the circuit, or alternatively may be mask programmable.
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公开(公告)号：US11513596B2
公开(公告)日：2022-11-29
申请号：US16849794
申请日：2020-04-15
发明人： A. Martin Mallinson
摘要： Described herein is a system and method for controlling a computing system by an AI network based upon an electroencephalograph (EEG) signal from a user. The user's EEG signals are first detected as the user operates an existing controller, during which time the associated artificial intelligence (AI) system learns by correlating the EEG signals with the commands received from the controller. Once the AI system determines that there is sufficient correlation to predict the user's actions, it can take control of the computing system and initiate commands based upon the user's EEG signal in place of the user's actions with the controller. At this point, weights in the AI network may be locked so that further commands from the controller, or the lack thereof, do not reduce correlation with the EEG signals. In some embodiments, the AI network may initiate commands faster than the user would be able to do.
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公开(公告)号：US11481601B2
公开(公告)日：2022-10-25
申请号：US16806980
申请日：2020-03-02
发明人： A. Martin Mallinson
IPC分类号： G06N3/04
摘要： An analog element for use as a neuron in a recurrent neural network is described, the analog element having memory of a prior layer state and being a continuous time circuit rather than having a discrete clocking interval. The element is characterized and described by the Laplace s-domain operator, as distinct from a digital solution that uses the z-domain operator appropriate for quantized time descriptions. Rather than using an all-pass filter, the analog equivalent of a unit delay in the z-domain, a finite gain integrator, which is a simpler circuit, may be used to provide the delay in the analog s-domain. The resulting circuit may be easily implemented at the transistor level.
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公开(公告)号：US11349446B2
公开(公告)日：2022-05-31
申请号：US17196914
申请日：2021-03-09
发明人： A. Martin Mallinson
摘要： An apparatus and method for using the known phenomena of quantum gate tunneling in semiconductor transistors to define the DC state of a charge-coupled amplifier is described. A first stage in which the tunneling current is bipolar (by pairing PMOS and NMOS transistors) in combination with a second stage with a controlled common mode voltage that can be used to control the first stage tunneling current, and thus the common mode voltage at the input. This can be done without the use of additional elements that may degrade performance or power consumption, since the input devices both process the input signal and maintain the DC operating point of the circuit. The approach may be advantageously used not only in charge-coupled amplifiers as described herein, but also in other capacitively coupled circuits such as charge balancing analog to digital converters (ADCs) and digital to analog converters (DACs).
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6.发明授权公开(公告)号：US10784888B2
公开(公告)日：2020-09-22
申请号：US16454812
申请日：2019-06-27
发明人： A. Martin Mallinson
IPC分类号： H03M3/00
摘要： Described herein is a ΣΔ modulator with improved metastability in which the control loop remains stable. In one embodiment, the ΣΔ modulator utilizes differently delayed feedback to successive integrators of the control loop to suppress metastability errors without compromising the stability of the control loop. This is accomplished by including one or more quantizers in the control loop. This technique may be applied to control loops of at least second order, i.e., having two or more integrator stages, where at least one feedback term after the first is non-zero.
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7.发明授权公开(公告)号：US10776345B2
公开(公告)日：2020-09-15
申请号：US15962962
申请日：2018-04-25
申请人： DataStax
IPC分类号： G06F16/22 , G06F16/23 , G06F16/24 , G06F16/245
摘要： Systems and methods are described herein for efficiently updating a secondary index associated with a log-structured merge-tree (LSM) database. A Global approximate member query (AMQ) Filter is queried to determine whether a primary key, retrieved from a list of LSM database updates, already exists in the LSM database. If the primary key does not already exist in the LSM database then read-before-write and delete operations, typically performed with known approaches, do not need to be performed on the secondary index in order to update the secondary index, thereby avoiding significant additional computer processing and input/output operations.
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公开(公告)号：US10591371B2
公开(公告)日：2020-03-17
申请号：US15619543
申请日：2017-06-12
摘要： Power transmitted from a cyclist to a bicycle through crank arms is indirectly measured by performing calculations on direct physical measurements. The direct physical measurements are taken from sensors that can be non-rotationally coupled to the frame of the bicycle. The sensors can be integrated into the frame or installed as a module within a standard, unmodified bicycle bottom bracket. Measured power can be viewed by the cyclist using a wirelessly connected user interface device.
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公开(公告)号：US10444502B1
公开(公告)日：2019-10-15
申请号：US16527814
申请日：2019-07-31
摘要： A method and apparatus for self-relative body tracking in virtual reality systems using magnetic tracking is disclosed, which allows more accurate tracking of a user's body relative to the user's field of vision. A head-mounted magnetic tracking (HMMT) system is used, in which other parts of a user's body are tracked relative to the HMD on the user's head, rather than relative to a base station. This results in less distortion of the magnetic field used for tracking and thus allows for more accurate determination of the position and orientation of a user's body parts relative to the user's field of vision, so that a more accurate avatar may be presented on the HMD to the user. This allows the avatar of the user's body part to be shown in a location that corresponds closely to its physical position. In an alternative embodiment, multiple portions of the user's body may be tracked.
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公开(公告)号：US10433046B2
公开(公告)日：2019-10-01
申请号：US16130979
申请日：2018-09-13
申请人： ESS Technology, Inc.
摘要： An improved system and method for reducing the ambient noise experienced by a user listening to an earpiece without the use of a microphone is disclosed. An “ambient noise signal” created by the sound pressure wave of the ambient noise acting on the earpiece transducer is obtained. In some embodiments, the ambient noise signal is inverted and fed back, and the inverted signal is added to the intended audio signal being sent to the earpiece so that the ambient noise is cancelled. In other embodiments, a processor receives the ambient noise signal and predicts the modification to the intended audio signal needed to counteract the ambient noise. The ambient noise signal may be obtained by comparing the actual signal across the earpiece transducer to the intended audio signal, or by detecting variations in the current across the transducer from the current generated to drive the transducer.
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