Precision internal low-frequency oscillator to generate real-time clock
Granted: July 16, 2024
Patent Number:
12040747
An oscillation circuit includes resistors with tap points for high/low reference voltages. An RC network coupled in parallel with the resistors includes a first capacitor to vary a first voltage input and a second capacitor to generate a second voltage input. A first comparator alternately compares the voltage inputs with the low reference voltage to generate oscillation outputs. A PTAT current DAC supplies an injection current to a resistor of the series of resistors that variably…
Systems, methods, and devices for wireless communication device-based detection of radio frequency identification devices
Granted: July 16, 2024
Patent Number:
12039397
Systems, methods, and devices detect radio frequency identification devices. Methods include transmitting a signal from a transmitter of a wireless device compatible with a wireless communications protocol, receiving, using a receiver of the wireless device, an encoded signal from a radio frequency identification (RFID) device, and determining a plurality of data values based, at least in part, on the received encoded signal. Methods further include generating an estimated distance value…
GPS-assisted collaborative and signaling-aided WLAN DFS operation
Granted: July 2, 2024
Patent Number:
12028796
Disclosed are methods and systems for a WLAN device to select an operating dynamic frequency selection (DFS) channel that minimizes the probability of radar interference by using aiding information. The aiding information may be a crowd-sourced database of geo-tagged radar zones including one or more DFS channels used within the geo-tagged radar zones that are detected by a plurality of WLAN devices. The WLAN device may query the crowd-sourced database for a geo-tagged radar zone that is…
Noise robust representations for keyword spotting systems
Granted: July 2, 2024
Patent Number:
12027156
Described are techniques for noise-robust and speaker-independent keyword spotting (KWS) in an input audio signal that contains keywords used to activate voice-based human-computer interactions. A KWS system may combine the latent representation generated by a denoising autoencoder (DAE) with audio features extracted from the audio signal using a machine learning approach. The DAE may be a discriminative DAE trained with a quadruplet loss metric learning approach to create a…
Hover detection for touchscreens
Granted: July 2, 2024
Patent Number:
12026344
Measured signal data, detected by a sensor array of a device, is used to create a generated representation from the measured signal data. The generated representation is compared with a measured representation of the measured signal data to create a correlation coefficient corresponding to a correlation between the generated representation and the measured representation of the measured signal data. A hover event is detected for the device if the correlation coefficient exceeds a first…
System and method for measuring battery impedance
Granted: July 2, 2024
Patent Number:
12025675
One or more circuits and/or methods are provided. In an example, a circuit includes a first sampling capacitor connected to a first battery terminal for connecting to a battery, an excitation circuit connected to the first battery terminal and configured to generate a first excitation signal, and a measurement circuit connected to the first sampling capacitor and configured to measure charge transferred to the first sampling capacitor by the first excitation signal to generate a charge…
Leveraging spectral diversity for machine learning-based estimation of radio frequency signal parameters
Granted: June 18, 2024
Patent Number:
12013473
An example method for estimating the angle-of-arrival (AoA) and other parameters of radio frequency (RF) signals that are received by an antenna array comprises: receiving a plurality of radio frequency (RF) signal power measurements by a plurality of antenna elements at a plurality of RF channels; computing, by applying a machine learning model to the plurality of RF signal power measurements, an estimated RF signal parameter value; and outputting the RF signal parameter value.
Systems, methods, and devices for security attribute caching and accelerated wake times of secured environments
Granted: June 11, 2024
Patent Number:
12008106
Systems, methods, and devices authenticate operations for secured execution environments. Methods include performing, using one or more processing elements of a secured execution environment, a first cryptographic computation on a portion of code to generate a result. Methods also include determining, using the one or more processing elements, an authenticated version of a cryptographic value, the authenticated version of the cryptographic value being determined based on a signature…
Oscillator frequency compensation with a fixed capacitor
Granted: June 4, 2024
Patent Number:
12003217
A frequency compensation circuit determines a target calibration count of a fixed capacitor coupled to a processing device. The frequency compensation circuit identifies a current calibration count of the fixed capacitor. The frequency compensation circuit determines that the current calibration count satisfies a threshold criterion associated with the target calibration count. In response to determining that the current calibration count satisfies the threshold criterion, the frequency…
Devices for configuring a system as a user approaches
Granted: June 4, 2024
Patent Number:
12004259
A device for a system includes a wireless transceiver, a memory, and a microcontroller. The microcontroller is communicatively coupled to the wireless transceiver and the memory. The microcontroller is configured to receive, via the wireless transceiver, user configuration data in response to a user approaching the system. The microcontroller is configured to store the user configuration data in the memory. The microcontroller is configured to transmit the user configuration data to an…
Current controlled architecture for a Vconn switch
Granted: June 4, 2024
Patent Number:
12003090
A Universal Serial Bus controller including a Vconn switch having a current controlled architecture, and method for operating the same are provided. Generally, the Vconn switch includes first and second transistors coupled in series between a Vconn terminal and a communication channel (CC) terminal, a replica switch including a source coupled to the Vconn terminal, a replica current generator including a first input coupled to a drain of the replica switch and a second input coupled to a…
Bit error correction for Bluetooth low energy
Granted: May 28, 2024
Patent Number:
11996936
Disclosed are methods and systems for a Bluetooth Low Energy (BLE) receiver to reduce the number of retransmission of packets needed to receive an error free packet so as to improve channel throughput. Techniques to reduce the number of retransmissions include a combination of processing of the header of the received packets to increase the number of corrupted packets available for reconstructing the original payload and bit error correction (BEC) of the payload of the corrupted packets.…
System and methods for improving secure phase-based positioning accuracy
Granted: May 28, 2024
Patent Number:
11994604
Techniques by a wireless to estimate the position of a remote device are disclosed. A main receiver of the wireless device may determine multiple first phase values of the RF signal received through a first antenna during multiple time intervals. An auxiliary receiver may determine multiple second phase values of the RF signal received through an array of auxiliary antennas during the multiple time intervals. Each of the second phase value may correspond to the RF signal received through…
Closed loop oscillator
Granted: May 21, 2024
Patent Number:
11990907
One or more devices, systems, and/or methods are provided. In an example of the techniques presented herein, an oscillator comprises a voltage controlled oscillator configured to generate an output clock based on a drive signal, a frequency to voltage converter having a time constant and configured to generate a feedback voltage having a decay cycle based on the time constant and a frequency based on a frequency of the output clock, and an integrator configured to generate the drive…
Robust WLAN reception in WiFi-bluetooth combination systems by interference whitening
Granted: May 14, 2024
Patent Number:
11985012
The embodiments described herein are directed at techniques to de-correlate Bluetooth interference seen across WLAN receive antennas/space in a Bluetooth transceiver/WLAN transceiver combination device. A Bluetooth interference whitening technique may be utilized, wherein a whitening matrix is computed based on a leakage signal resulting from a training signal transmitted by the Bluetooth transceiver. The leakage signal may leak in to the WLAN transceiver and a set of attributes is…
Systems and method for always-on sensing user interface
Granted: May 14, 2024
Patent Number:
11983060
Disclosed are sensing systems and methods that eliminate CPU intervention or interrupts when performing sensor scans of a touch interface, supports low power sensing operation without requiring periodic wake up of the CPU, and is scalable to multi-channel or multi-chip sensor configuration to support large touch screens or a high number of sensors. Sensor scanning is configured and controlled by an autonomous engine and comparison is completed by wake-up detection logic, operable without…
High performance inductive sensing all digital phase locked loop
Granted: April 30, 2024
Patent Number:
11973498
Front-end circuits that combine inductive and capacitive sensing are described. In one embodiment, an apparatus includes a plurality of inductive elements, an inductive measurement circuit, and a frequency divider circuit. The inductive measurement circuit is to output a first signal with a first frequency. The first signal is associated with an inductance change of one of the inductive elements. A feedback circuit can maintain the sinusoidal operation of the first signal. The frequency…
Hover sensing with multi-phase self-capacitance method
Granted: April 30, 2024
Patent Number:
11972078
A capacitance sensing device includes a transmit (TX) generator for generating a sequence of receive (RX) signals by applying each TX signal pattern in a sequence of TX signal patterns to a set of sensor electrodes. For each TX signal pattern in the sequence of TX signal patterns, and for each subset of three or more contiguous sensor electrodes of the set of sensor electrodes, the TX generator applies to the subset one of a first excitation signal and a second excitation signal. The…
Received signal strength indicator (RSSI) signature for tire localization
Granted: April 16, 2024
Patent Number:
11958321
Techniques are described for using one or more wireless host devices to perform tire localization of TPMS sensor data by determining received signal strength indicator (RSSI) signatures that are unique to the wireless communication channel between a host device and each TPMS sensor. RSSI signatures represents a periodic variation of the wireless communication channel between a host device on the car body and a TPMS sensor in a rotating tire. Characteristics of the communication channel…
Leveraging spectral diversity for machine learning-based estimation of radio frequency signal parameters
Granted: April 9, 2024
Patent Number:
11953611
An example method for estimating the angle-of-arrival (AoA) and other parameters of radio frequency (RF) signals that are received by an antenna array comprises: receiving a plurality of radio frequency (RF) signal power measurements by a plurality of antenna elements at a plurality of RF channels; computing, by applying a machine learning model to the plurality of RF signal power measurements, an estimated RF signal parameter value; and outputting the RF signal parameter value.
