公开(公告)号：US11313909B2

公开(公告)日：2022-04-26

申请号：US17100286

申请日：2020-11-20

Applicant: Silicon Laboratories Inc.

Inventor： Matthew R. Williamson ,  Sebastian Ahmed

IPC: G01R31/327 ,  H03K5/24 ,  H03K19/21

Abstract: A switch sensor for sensing a state of a switch including a programmable memory, pulse generation circuitry, and comparator circuitry. The memory stores a state value indicative of a detected state of the switch. The pulse generation circuitry provides a pulse-train voltage signal to a first end of the switch, in which the pulse-train voltage signal is toggled between an active state for switch state detection and an inactive state for conserving power. A second terminal of the switch is coupled through resistive circuitry to a supply voltage node and may be coupled to an input terminal of the sensor. The comparator circuitry compares a state of the input terminal with the state value when the pulse-train voltage signal is in the active state for providing a state change signal indicative thereof.

公开(公告)号：US20210183380A1

公开(公告)日：2021-06-17

申请号：US16711889

申请日：2019-12-12

Applicant: Silicon Laboratories Inc.

Inventor： Antonio Torrini ,  Ramin Khoini-Poorfard ,  Sebastian Ahmed

IPC: G10L15/22 ,  G10L25/18 ,  G10L15/16 ,  G10L25/78 ,  G10L25/24 ,  G10L15/06 ,  G06N3/04 ,  G06N3/08

Abstract: A system and method of keyword spotting using two neural networks is disclosed. The system is in sleep mode most of the time, and wakes up periodically. Upon waking, a limited duration of audio is examined. This may be performed using an auxiliary neural network. If any audio activity is detected in this duration, the system fully wakes and examines a longer duration of audio for keywords. The keyword spotting is also performed by the main neural network, which may be a convolutional neural network (CNN).

公开(公告)号：US20240419448A1

公开(公告)日：2024-12-19

申请号：US18816208

申请日：2024-08-27

Applicant: Silicon Laboratories Inc.

Inventor： Matthew Brandon Gately ,  Eric Jonathan Deal ,  Mark Willard Johnson ,  Sebastian Ahmed

IPC: G06F9/345 ,  G06F9/32

Abstract: An apparatus includes an array processor to process array data. The array data are arranged in a memory. The array data are specified with programmable per-dimension size and stride values. A method for processing array data includes executing at least one loop by at least one corresponding loop controller of a plurality of loop controllers in an array processor. Each loop of the at least one loop is executed according to a corresponding begin flag and a corresponding end flag. The method may include generating an instruction stream by decoding a loop control field of a corresponding macro-instruction. The method may include configuring the corresponding begin flag and the corresponding end flag according to a corresponding begin flag field in the instruction stream and a corresponding end flag field in the instruction stream.

公开(公告)号：US20220075906A1

公开(公告)日：2022-03-10

申请号：US17100329

申请日：2020-11-20

Applicant: Silicon Laboratories Inc.

Inventor： Sebastian Ahmed

IPC: G06F21/87 ,  G06F21/72

Abstract: An integrated circuit including an input terminal and an output terminal, signal generator circuitry that generates a pseudo-random digital signal provided at the output terminal, and comparator circuitry that compares an input signal received via the input terminal with the pseudo-random digital signal for providing a tamper detection signal indicative thereof. The signal generator circuitry may be a pseudo-random binary sequence generator or may be a linear-feedback shift register with software triggered reloading. The comparator circuitry may include a Boolean logic exclusive-OR gate for comparing the output and input signals. A method of detecting tampering including generating and providing a pseudo-random digital signal at an output terminal and comparing an input signal received via an input terminal with the pseudo-random digital signal for providing a tamper detection signal indicative thereof.

公开(公告)号：US12079630B2

公开(公告)日：2024-09-03

申请号：US17361240

申请日：2021-06-28

Applicant: Silicon Laboratories Inc.

Inventor： Matthew Brandon Gately ,  Eric Jonathan Deal ,  Mark Willard Johnson ,  Sebastian Ahmed

IPC: G06F9/345 ,  G06F9/32

CPC classification number: G06F9/3455 ,  G06F9/325

Abstract: An apparatus includes an array processor to process array data. The array data are arranged in a memory. The array data are specified with programmable per-dimension size and stride values.

公开(公告)号：US11599684B2

公开(公告)日：2023-03-07

申请号：US17100329

申请日：2020-11-20

Applicant: Silicon Laboratories Inc.

Inventor： Sebastian Ahmed

IPC: G06F21/72 ,  G06F21/87

Abstract: An integrated circuit including an input terminal and an output terminal, signal generator circuitry that generates a pseudo-random digital signal provided at the output terminal, and comparator circuitry that compares an input signal received via the input terminal with the pseudo-random digital signal for providing a tamper detection signal indicative thereof. The signal generator circuitry may be a pseudo-random binary sequence generator or may be a linear-feedback shift register with software triggered reloading. The comparator circuitry may include a Boolean logic exclusive-OR gate for comparing the output and input signals. A method of detecting tampering including generating and providing a pseudo-random digital signal at an output terminal and comparing an input signal received via an input terminal with the pseudo-random digital signal for providing a tamper detection signal indicative thereof.

公开(公告)号：US11415657B2

公开(公告)日：2022-08-16

申请号：US16587221

申请日：2019-09-30

Applicant: Silicon Laboratories Inc.

Inventor： Antonio Torrini ,  Sebastian Ahmed ,  Joel Kauppo ,  Sauli Johannes Lehtimaki

IPC: G01S3/04 ,  G06N3/08 ,  G01S3/28 ,  G01S3/48

Abstract: A system and method of determining the angle of arrival or departure using a neural network is disclosed. The system collects a plurality of I and Q samples as a packet containing a constant tone extension is being received. The I and Q samples are used to form I and Q arrays, which are used as the input to the neural network. The neural network produces a first output representative of the azimuth angle and a second output representative of the elevation angle. In certain embodiments, the neural network is capable of detecting a plurality of angles, where, for each angle, there are three outputs, a first output representative of the azimuth angle, a second output representative of the elevation angle and a third output representative of the relative amplitude. In some embodiments, the neural network is configured to determine the carrier frequency offset of an incoming signal as well.

公开(公告)号：US20220074991A1

公开(公告)日：2022-03-10

申请号：US17100286

申请日：2020-11-20

Applicant: Silicon Laboratories Inc.

Inventor： Matthew R. Williamson ,  Sebastian Ahmed

IPC: G01R31/327 ,  H03K19/21 ,  H03K5/24

Abstract: A switch sensor for sensing a state of a switch including a programmable memory, pulse generation circuitry, and comparator circuitry. The memory stores a state value indicative of a detected state of the switch. The pulse generation circuitry provides a pulse-train voltage signal to a first end of the switch, in which the pulse-train voltage signal is toggled between an active state for switch state detection and an inactive state for conserving power. A second terminal of the switch is coupled through resistive circuitry to a supply voltage node and may be coupled to an input terminal of the sensor. The comparator circuitry compares a state of the input terminal with the state value when the pulse-train voltage signal is in the active state for providing a state change signal indicative thereof.

公开(公告)号：US11227614B2

公开(公告)日：2022-01-18

申请号：US16898806

申请日：2020-06-11

Applicant: Silicon Laboratories Inc.

Inventor： Antonio Torrini ,  Sebastian Ahmed

IPC: G10L19/02 ,  G10L25/18

Abstract: A system and method of recording and transmitting compressed audio signals over a network is disclosed. The end node device first converts the audio signal to a spectrogram, which is commonly used by machine learning algorithms to perform speech recognition. The end node device then compresses the spectrogram prior to transmission. In certain embodiments, the compression is performed using Discrete Cosine Transforms (DCT). Furthermore, in some embodiments, the DCT is performed on the difference between two columns of the spectrogram. Further, in some embodiments, a function that replaces values below a predetermined threshold with zeroes in the Encoded Spectrogram is utilized. These functions may be performed in hardware or software.

公开(公告)号：US10289840B2

公开(公告)日：2019-05-14

申请号：US15612841

申请日：2017-06-02

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes ,  Sebastian Ahmed ,  Lars Lydersen

IPC: G06F21/55 ,  G06F21/72

Abstract: An integrated circuit includes a tamper sensor that has plurality of state circuits. Each of the plurality of state circuits has a respective output that provides a respective logic state. When operating properly, the respective logic state is toggled in response to a clock signal. The respective logic state fails to toggle in response to a respective fault injection. The tamper sensor has an output that provides a fault signal in response to a difference in the respective logic state of the plurality of state circuits. Additionally, the integrated circuit includes a protected circuit, as well as a tamper response circuit. The tamper response circuit is connected to the tamper sensor and to the protected circuit. The tamper response circuit executes a protection operation to secure the protected circuit in response to the fault signal.