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1. 发明公开

US20240310867A1 FAST PREDICTION PROCESSOR 审中-公开
公开(公告)号：US20240310867A1
公开(公告)日：2024-09-19
申请号：US18675736
申请日：2024-05-28
申请人： Lightmatter, Inc.
发明人： Michael Gould , Carl Ramey , Nicholas C. Harris , Darius Bunandar
IPC分类号： G06E3/00 , H03H17/00 , H03H17/06 , H03M1/12
CPC分类号： G06E3/008 , H03H17/06 , H03H2017/0081 , H03M1/12
摘要： Hybrid analog-digital processing systems are described. An example of a hybrid analog-digital processing system includes photonic accelerator configured to perform matrix-vector multiplication using light. The photonic accelerator exhibits a frequency response having a first bandwidth (e.g., less than 3 GHz). The hybrid analog-digital processing system further includes a plurality of analog-to-digital converters (ADCs) coupled to the photonic accelerator, and a plurality of digital equalizers coupled to the plurality of ADCs, wherein the digital equalizers are configured to set a frequency response of the hybrid analog-digital processing system to a second bandwidth greater than the first bandwidth.

2. 发明公开

US20240267033A1 MOTOR POSITION ESTIMATION USING CURRENT RIPPLES 审中-公开
公开(公告)号：US20240267033A1
公开(公告)日：2024-08-08
申请号：US18562432
申请日：2022-05-20
申请人： Magna Seating Inc
发明人： Hanlong Yang , Ruihang Wu , Matthew J. Kobberstad
IPC分类号： H03H17/00 , H02P7/00
CPC分类号： H03H17/0054 , H02P7/0094 , H03H2017/0081
摘要： A method is provided for monitoring a motor within a seat assembly in an automotive vehicle. The method comprises the steps of measuring raw current values drawn by the motor to reposition the seat assembly, temporally dividing the raw current values into sections based on size and variations in the raw current values, filtering the raw current values in each section to obtain filtered current values, detecting local peaks within the filtered current values, and determining a rotational position or a speed of the motor based on the detected local peaks.

3. 发明公开

US20240244544A1 SYNCHRONIZATION OF AUDIO STREAMS AND SAMPLING RATE FOR WIRELESS COMMUNICATION 审中-公开
公开(公告)号：US20240244544A1
公开(公告)日：2024-07-18
申请号：US18419738
申请日：2024-01-23
申请人： Starkey Laboratories, Inc.
发明人： Alex Volkov , Baktash Boghrati , Edward John Cunningham , Mohammad Reza Movahedi , Jeffrey Paul Solum
IPC分类号： H04W56/00 , H04L47/30 , H04R25/00 , H03H17/00 , H03H17/06 , H04L47/263
CPC分类号： H04W56/001 , H04L47/30 , H04R25/552 , H04R25/554 , H04W56/004 , G10H2250/631 , H03H17/0018 , H03H17/0642 , H04L2012/5681 , H04L47/263 , H04R2225/55
摘要： Disclosed herein, among other things, are methods and apparatus for providing a time-stamp based controller for synchronization of sink or source sampling rate with external packet rate. A method for wireless communications includes receiving a transmission of a packet using a wireless transceiver of an electronic device, and using a processor of the electronic device to read a first value of a system timer and store the first value as an arrival time-stamp. The packet is decoded and processed by the processor, and sent to an output. When the processed packet is sent, a second value of the system timer is read, adjusted and stored as a departure time-stamp. The arrival time-stamp and the departure time-stamp are used to calculate an adjustment stimulus for a sample rate actuator of the electronic device. The sample rate actuator is configured to maintain synchronization of sampling rate with an external packet rate.

4. 发明授权

US11804849B2 Infinite impulse response filters with dithering and methods of operation thereof 有权
公开(公告)号：US11804849B2
公开(公告)日：2023-10-31
申请号：US17657991
申请日：2022-04-05
申请人： STMicroelectronics KK
发明人： Ryo Tsutsui
IPC分类号： H03M3/00 , G06F7/58 , H03M1/06 , H03H17/00 , H03H17/02
CPC分类号： H03M3/33 , G06F7/588 , H03M1/0626 , G06F2207/583 , H03H17/0213 , H03H2017/0072
摘要： An infinite impulse response filter includes a plurality of lower order filter stages and a random number generator circuit. The plurality of lower order filter stages include a first filter stage coupled to a second filter stage. The random number generator circuit includes a first output coupled to the first filter stage and a second output coupled to the second filter stage. The random number generator circuit is configured to generate the same random value at both the first output and the second output. The infinite impulse response filter is an nth-order filter. The respective order of each of the lower order filter stages is less than n.

5. 发明授权

US11652471B2 Low power biquad systems and methods 有权
公开(公告)号：US11652471B2
公开(公告)日：2023-05-16
申请号：US16917694
申请日：2020-06-30
申请人： Google LLC
发明人： Jens Kristian Poulsen
IPC分类号： H03H17/00 , H03H17/02
CPC分类号： H03H17/0248
摘要： Biquad stage systems and methods include receiving at biquad sections a signal sample, generating, by each biquad section, a pair of output values based on the signal sample, including a first value based on fixed-point processing path and a second value emulating a floating-point processing path, and accumulating the pair of output values from each of the plurality of biquad sections to generate an output signal. The biquad stage receives an N-bit input signal, which is processed by a biquad section. Delay elements delay the signal sample before input to other biquad sections. The delayed signal sample is input to the first processing path and the second processing path of a corresponding biquad stage. By performing the processing based on two paths, a more accurate result can be found when using a reduced word length in the multiply operations resulting in a lowering of the power consumption.

6. 发明授权

US11575364B2 Apparatuses and methods for shifting a digital signal by a shift time to provide a shifted signal 有权
公开(公告)号：US11575364B2
公开(公告)日：2023-02-07
申请号：US16543756
申请日：2019-08-19
申请人： Apple Inc.
发明人： Thomas Bauernfeind , Andreas Menkhoff , Michael Bruennert
IPC分类号： H03M7/00 , H03H17/02 , H03H17/00 , H03H17/06
摘要： An apparatus for shifting a digital signal having a first sample rate by a shift time to provide a shifted signal having a second sample rate is provided. The apparatus includes a sample rate converter configured to provide a value of an interpolated signal at a compensated sample time as a sample of the shifted signal, the interpolated signal being based on the digital signal. The sample rate converter is configured to modify a time interval between a sample time of the digital signal and the compensated sample time based on the shift time.

7. 发明授权

US11514302B2 Programmable impedance 有权
公开(公告)号：US11514302B2
公开(公告)日：2022-11-29
申请号：US16806264
申请日：2020-03-02
申请人： SiliconIntervention Inc.
发明人： A. Martin Mallinson
IPC分类号： H03H17/00 , G06N3/063 , G06F30/36
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.

8. 发明授权

US11323130B2 Infinite impulse response filters with dithering and methods of operation thereof 有权
公开(公告)号：US11323130B2
公开(公告)日：2022-05-03
申请号：US16683859
申请日：2019-11-14
申请人： STMicroelectronics KK
发明人： Ryo Tsutsui
IPC分类号： G06F7/58 , H03H17/00 , H03H17/02 , H03M3/00 , H03M1/06
摘要： A method of filtering includes generating a random value by a random number generator circuit, filtering a first signal by a first filter to form a filtered first signal, dithering the filtered first signal using the random value to form a dithered first signal, filtering a second signal by a second filter to form a filtered second signal, and dithering the filtered second signal using the random value to form a dithered second signal.

9. 发明授权

US11303295B1 SDM encoder and related signal processing system 有权
公开(公告)号：US11303295B1
公开(公告)日：2022-04-12
申请号：US17452403
申请日：2021-10-26
申请人： xMEMS Labs, Inc.
发明人： Jemm Yue Liang , Hsi-Sheng Chen
IPC分类号： H03M3/00 , H03H17/04 , H03H17/06 , G10L19/032 , H03H17/00 , H03F3/20
摘要： A signal density modulation (SDM) encoder includes a first subtractor, a sigma circuit and a multi-bit quantizer. The first subtractor is used for receiving an input signal. The sigma circuit is coupled to the first subtractor. The multi-bit quantizer, coupled to the first subtractor and the sigma circuit, is configured to generate an output signal. The sigma circuit or the multi-bit quantizer produces a first feedback signal to the first subtractor. The first subtractor performs a subtraction operation according to the first feedback signal and the input signal, and generates a delta signal. The sigma circuit performs an operation on the delta signal, such that the SDM encoder has a noise transfer function having a high pass filtering effect. The noise transfer function is a ratio of a quantization error brought by the multi-bit quantizer with respect to the input signal. The output signal has more than two levels.

10. 发明授权

US11293812B2 Adaptive filter bank for modeling a thermal system 有权
公开(公告)号：US11293812B2
公开(公告)日：2022-04-05
申请号：US16519751
申请日：2019-07-23
申请人： Schneider Electric USA, Inc.
发明人： Larry A. Turner
IPC分类号： G01K7/42 , G06F30/20 , G01F1/86 , G01K1/022 , H03H17/04 , H03H17/00
摘要： Embodiments of the disclosure implement an application of an adaptive filter bank that is used to characterize the heat transfer of a volume in a thermal system, to estimate temperature and power consumption, and to improve performance characteristics in applications including optimal temperature control and diagnostics. In some embodiments, the adaptive filter bank is an iterative solution, comprised of a collection of adaptive filters defined to consume incident signals, produce an aggregate reference signal, estimate an error relative to an observed primary signal, and modify thermal coefficients to converge on a solution. For example, the incident signals are comprised of properties related to active, passive, solar irradiance, and unobserved heat transfer. A reference signal is an estimate of a primary signal, related to the rate of heat transfer or temperature change. Thereupon, the thermal coefficients are modified in an adaptive process to include gradient descent, which minimizes estimation error.

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