Bi-phase Mark Code Asynchronous Decoder using SPI Block
Granted: August 17, 2023
Application Number:
20230259480
Disclosed are techniques for using firmware and hardware blocks of a device to decode signals encoded by signal edge positioning within a data bit width, such as bi-phase mark space coding (BMC) used for encoding in-band communication of wireless charging systems. The first device may use general purpose I/O (GPIO) interrupts to detect the start of a packet. The firmware may synchronize and configure the clock of a serial peripheral interface (SPI) to oversample the signals. The SPI may…
Psuedo Digital ASK Demodulator with Integrated Buck Boost and USB-PD for Wireless Charging
Granted: August 17, 2023
Application Number:
20230258694
Disclosed are techniques for using a sense amplifier for the voltage path having an adjustable gain and a current amplifier for the current path having an adjustable sample-hold interval for demodulation of in-band ASK data in power transmitting devices of a wireless charging system. The sample-hold interval may be adjusted as a function of the error rate of the demodulated data and used to sample the modulated current when the adjustable gain of the voltage path is not able to track the…
SEAMLESS PLAYBACK AND SWITCHING FOR WIRELESS COMMUNICATIONS DEVICES
Granted: August 10, 2023
Application Number:
20230254748
Systems, methods, and devices seamlessly playback data files using one or more wireless connections. Methods include establishing a first wireless connection between a source device and a sink device, the first wireless connection using a first transmission protocol and transmitting audio data via the first wireless connection. Methods further include determining a switch should be initiated based on one or more signal quality metrics, the one or more signal quality metrics representing,…
FOREIGN OBJECT DETECTION USING DECAY COUNTER FOR Q-ESTIMATION
Granted: August 10, 2023
Application Number:
20230253836
A method of foreign object detection by a wireless power delivery system is disclosed. A decaying coil voltage signal of a transmitting coil of the wireless power delivery system is detected. A first comparator is used to trigger a cycle count of the decaying coil voltage signal. When the first comparator triggers the cycle count, a second comparator is used to count a number of cycles of the decaying coil voltage signal. A quality factor (Q-factor) of the transmitting coil is determined…
METHODS, DEVICES AND SYSTEMS FOR PREVENTING TRACKING BY USE OF REPLY ATTACKS
Granted: August 3, 2023
Application Number:
20230247431
A method can include establishing a wireless encrypted connection; establishing a long term encryption key (LTK) and an anti-tracking (A-T) count value for a peer device; storing the LTK and A-T count value in a nonvolatile memory circuit; receiving a communication that includes an identity value corresponding to the peer device and a peer hashed anti-tracking count (HATC); generating at least one local HATC by executing a predetermined hash function on at least the LTK and a changed A-T…
MULTI-LAYERED AUTHENTICATION AND PERMISSION METHODS, SYSTEMS AND APPARATUSES
Granted: July 27, 2023
Application Number:
20230237130
A method can include receiving user input values via a plurality of inputs of a motor vehicle and determining if each received user input value corresponds to an authenticated user value in a secure memory of the motor vehicle. For each received user input value corresponding to an authenticated user value, a certainty factor corresponding to the authenticated user value can be accessed from a secure memory. A certainty score can be generated from all accessed certainty factors. Each of…
HIGH-SPEED, ACCURATE PEAK AND VALLEY SENSING FOR SECONDARY-CONTROLLED FLYBACK CONVERTER
Granted: July 20, 2023
Application Number:
20230231483
A secondary side controller for a flyback converter includes an integrated circuit (IC), which in turn includes: a synchronous rectifier (SR) sense pin coupled to a drain of an SR transistor on a secondary side of the flyback converter; a capacitor having a first side coupled to the SR sense pin, the capacitor to charge or discharge responsive to a voltage sensed at the SR sense pin; a diode-connected transistor coupled between a second side of the capacitor and ground; a first current…
Secondary Side Controlled QR Flyback Converter using a Programmable Valley Algorithm
Granted: July 13, 2023
Application Number:
20230223858
A secondary-side-controller for a QR flyback converter and method for operating the same are provided. Generally, the secondary-side-controller includes a driver configured to control a power-switch (PS) on a primary side of converter to turn on the PS when a sinusoidal input voltage to the converter is at one of a plurality of valleys, an analog-to-digital-converter (ADC) to read the input voltage, output voltage, and load current, and generate digital signals based thereon. A…
ROBUST WLAN RECEPTION IN WIFI-BLUETOOTH COMBINATION SYSTEMS BY INTERFERENCE WHITENING
Granted: July 6, 2023
Application Number:
20230216714
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…
INDUCTIVE SENSING METHODS, DEVICES AND SYSTEMS
Granted: June 29, 2023
Application Number:
20230204644
A method can include in a first phase of a sensing operation, controlling at least a first switch to energize a sensor inductance; in a second phase of the sensing operation that follows the first phase, controlling at least a second switch to couple the sensor inductance to a first modulator capacitance to induce a first fly-back current from the sensor inductance, the first fly-back current generating a first modulator voltage at the first modulator capacitance, and in response to the…
EFFICIENT PROCEDURES TO CREATE BLUETOOTH LE CENTRAL CONNECTION ON AN ADVERTISER
Granted: June 22, 2023
Application Number:
20230199872
Disclosed are techniques for a device that wants to be a central device when creating a connection in a communication network such as Bluetooth Low Energy (BLE) to advertise information associated with a connection window to solicit a connection with a scanning peer device. When the scanning peer device receives the information, it may enter a connection as a peripheral device with the advertising device at the advertised connection window, allowing the advertising device to become the…
ENHANCED PREDICTION OF TIMING OF ACTIVITY FOR WIRELESS DEVICES
Granted: June 22, 2023
Application Number:
20230199814
Systems, methods, and devices predict activity of wireless devices. Methods include identifying one or more conditions indicating aperiodic activity will occur at a first radio, the first radio being a wireless radio compatible with a first wireless communications protocol, and receiving, at a second radio, timing information associated with the first radio via an interface between the first radio and the second radio, the second radio being a wireless radio compatible with a second…
METHODS, DEVICES AND SYSTEMS FOR ESTIMATING DISTANCE WITH TRANSMITTED FREQUENCY SETS
Granted: June 22, 2023
Application Number:
20230199456
A method can include determining a plurality of sample sets, each sample set being different from one another and including a plurality of frequencies separated by a uniform frequency range; wirelessly transmitting information identifying the sample sets for at least one remote device; for each sample set, transmitting a tone on each frequency of the sample set, receiving a tone on each frequency of the sample set from another device, and determining phase difference values for the…
HIGH PERFORMANCE INDUCTIVE SENSING ALL DIGITAL PHASE LOCKED LOOP
Granted: June 15, 2023
Application Number:
20230188135
One inductive sensor is configured to maintain a fixed frequency in a resonant circuit. One apparatus includes an inductance-to-digital converter (LDC). The LDC includes a digital filter to measure an inductance change of a sensor and convert the inductance change to a digital value. The LDC further includes a digital control loop to maintain a fixed frequency in the sensor. The sensor forms an oscillator in the digital control loop. An output of the digital control loop is…
FRAME SYNCH DETECTION WITH INTRUSION DETECTION
Granted: June 15, 2023
Application Number:
20230189000
Techniques are described to improve the security of frame synchronization detection between wireless devices in high accuracy positioning (HAP) applications using personal area networks (PANs). A receiver may detect whether a frame synchronization pattern has been manipulated by comparing the sampled data of the received frame synchronization pattern with a reference waveform predicted as the frame synchronization pattern. The receiver may reuse the data in the correlation buffer at the…
DEVICES FOR CONFIGURING A SYSTEM AS A USER APPROACHES
Granted: June 15, 2023
Application Number:
20230188970
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…
ULTRA-LOW POWER ADAPTIVELY RECONFIGURABLE SYSTEM
Granted: June 15, 2023
Application Number:
20230188139
Implementations disclosed describe an integrated circuit (IC) having a plurality of reconfigurable analog circuits that include a finite state machine (FSM) logic circuit and further include an interface to receive an input signal. In a first IC configuration, with the plurality of reconfigurable analog circuits having a first configuration setting, the IC may process the input signal through the plurality of reconfigurable analog circuits to generate a first output value based on the…
PEER-ASSISTED, OUT-OF-BAND DISCOVERY OF A SINGLE-BAND WIRELESS ACCESS POINT
Granted: June 8, 2023
Application Number:
20230180105
Implementations disclosed describe systems and methods that include establishing, by a wireless device, a communication link with a wireless access point (AP) device over an operating channel, the wireless AP device providing a single-band access within a first frequency band; time-multiplexing, by the wireless device, transmitting beacons or probes within a second frequency band with communicating with the wireless AP device over the operating channel within the first frequency band;…
HIGH-DISTANCE DIRECTIONAL PROXIMITY SENSOR
Granted: June 8, 2023
Application Number:
20230176660
Apparatuses and methods of high-distance directional proximity sensors are described. One apparatus includes at least three electrodes in a sensor layer, an electrode in a shield layer, and an insulator located between the layers. A processing device is configured to scan the at least three electrodes over a period of time to obtain a digital signal for each of the at least three electrodes while driving a shield signal on the electrode of the shield layer. The processing device detects…
LEVERAGING SPECTRAL DIVERSITY FOR MACHINE LEARNING-BASED ESTIMATION OF RADIO FREQUENCY SIGNAL PARAMETERS
Granted: June 1, 2023
Application Number:
20230168330
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.
