Analog Devices,inc.

Intel Corporation

Dbx Corporation

Analog Devices Global

Invensense, Inc.

Analog Devices International Unlimited Company

Analog Devices Global Unlimited Company

Bsr North America, Ltd.

Carillon Technology, Inc.

Robert W Adams

John Whitley Richardson

David M Williams

Burt W Perry

Khiem Quang Nguyen

Kim Spetzler Berthelsen

Tom W Kwan

Mic Bowman

Michael C Coln

Martin Kessler

Paul F Ferguson, Jr

Lewis F Lahr

Miguel A Chavez

William Hooper

Paul Brett

Peter Sealey

Robert Conrad Knauerhase

Jeffrey G Bernstein

Sefa Demirtas

David MacDonald Hossack

Mark Y Kelly

Colin Gerard Lyden

Shao-Wen Yang

Michael J Nolan

Yen-kuang Chen

Gary Wayne Elko

Kieran P Harney

John Brady

John Ross Wallrabenstein

Mikael Mortensen

Ignacio J Alvarez Martinez

Nelson L Yaple

Deniz Karakoyunlu

Apparajan Ganesan

Paschal Thomas Minogue

Jeff N Kidder

Olli Haila

Maria Del Mar Chamarro Marti

Scott Vincelette

Paul John Morrow

Andrew Milia

Douglas J Mar

M K Stephen Yeung

Mike Dominic Keane

Richard Thomas O'Brien

Hans Johan Olaf Mansson

Glen J Anderson

Eric G Nestler

Benjamin Vigoda

Harvey Weinberg

Eric C Gaalaas

Michael W Determan

Dhananjay V Keskar

Tony Joseph Akl

Yevgeniy Y Yarmosh

Jose Paul Puthenkulam

Kasper Strange

Atsushi Matamura

Mark D Atkins

Sejun Kim

Paul A Baginski

Rob Knauerhase

Mayur Anvekar

Mira Wilczek

Leslie B Tyler

Dean J Sanvitale

Jason D King

Donald M Boettger

David Lamb

Maikael Mortensen

Thomas Stoltz

Rama Thakar

Joseph Burke

Andrew Abo

Gungadhar Burra

Kevin J McLaughlin

Disclosed herein are two-wire communication systems and applications thereof. In some embodiments, a slave node transceiver for low latency communication may include upstream transceiver circuitry to receive a first signal transmitted over a two-wire bus from an upstream device and to provide a second signal over the two-wire bus to the upstream device; downstream transceiver circuitry to provide a third signal downstream over the two-wire bus toward a downstream device and to receive a fourth signal over the two-wire bus from the downstream device; and clock circuitry to generate a clock signal at the slave node transceiver based on a preamble of a synchronization control frame in the first signal, wherein timing of the receipt and provision of signals over the two-wire bus by the node transceiver is based on the clock signal.

Two-wire communication systems and applications

Data is received describing a local model of a first device generated by the first device based on sensor readings at the first device and a global model is updated that is hosted remote from the first device based on the local model and modeling devices in a plurality of different asset taxonomies. A particular operating state affecting one or more of a set of devices deployed in a particular machine-to-machine network is detected and the particular machine-to-machine network is automatically reconfigured based on the global model.

Distributed framework for resilient machine-to-machine system management

A variable output data rate converter circuit preferably meets performance requirements while keeping the circuit complexity low. In some embodiments, the converter circuit may include an oversampling sigma delta modulator circuit to quantize an analog input signal at an oversampled rate, and output an sigma delta modulated signal, a transposed polynomial decimator circuit to decimate the sigma delta modulated signal, and output a first decimated signal, and an integer decimator circuit to decimate the first decimated signal by an integer factor and output a second decimated signal having a desired output data rate. The transposed polynomial decimator circuit has a transposed polynomial filter circuit and a digital phase locked loop circuit, which tracks a ratio between a sampling rate of the first decimated signal and the oversampled rate, and outputs an intersample position parameter to the transposed polynomial filter circuit.

Circuits, systems, and methods for providing asynchronous sample rate conversion for an oversampling sigma delta analog to digital converter

This application describes systems and methods for using a physical unclonable function (PUF) to authenticate a device, which may include circuitry for generating PUF values that may uniquely identify the device. According to one aspect, the device may provide enrollment PUF values to an authentication device. The device may later be authenticated if PUF values generated by the device are within a threshold distance of the enrollment PUF values. Since the PUF values are compared using a distance, it may not necessary to apply an error correcting code to the PUF values. The enrollment values and/or the calculated distance may be adjusted to compensate for time variations in the PUF values due to circuit aging. Systems and methods are also described herein for authenticating the device without revealing new PUF values to any second party, for example using a cryptographic technique known as a garbled circuit.

Device authentication based on analog characteristics without error correction

Many processes for audio signal processing can benefit from voice activity detection, which aims to detect the presence of speech as opposed to silence or noise. The present disclosure describes, among other things, leveraging energy-based features of voice and insights on first and second formant frequencies of vowels to provide a low-complexity and low-power voice activity detector. A pair of two channels is provided whereby each channel is configured to detect voice activity in respective frequency bands of interest. Simultaneous activity detected in both channels can be a sufficient condition for determining that voice is present. More channels or pairs of channels can be used to detect different types of voices to improve detection and/or to detect voices present in different audio streams.

Low-complexity voice activity detection

Activity monitors and smart watches utilizing optical measurements are becoming widely popular, and users expect to get an increasingly accurate estimate of their heart rate (HR) from these devices. These devices are equipped with a light source and an optical sensor which enable estimation of HR using a technique called photoplethysmography (PPG). One of the main challenges of HR estimation using PPG is the coupling of motion into the optical PPG signal when the user is moving randomly or exercising. The present disclosure describes a computationally feasible and fast HR estimation algorithm to be executed at instances of little or no motion. Resulting HR readings may be useful on their own, or be provided to systems that monitor HR continuously to prevent the problem of such systems being locked on an incorrect HR for long periods of time. Implementing techniques described herein leads to more accurate HR measurements.

On-demand heart rate estimation based on optical measurements

Embodiments of a system and method for sharing media content are generally described herein. A method may include receiving, from a first clearing device, a first indication of approval for sharing media content from an originating device, the first indication identifying the originating device, sending an encryption key for sharing the media content to the originating device, receiving an encrypted file, the encrypted file including the media content encrypted using the encryption key from the originating device, sending the encryption key and the encrypted file to a second clearing device, receiving, from the second clearing device, a second indication of approval for viewing media content, the second indication identifying a destination device, and sending, in response to receiving the second indication of approval, the encryption key and the encrypted file to the destination device.

Permission-based secure media content sharing

The present invention relates in one aspect to a method of detecting diaphragm excursion of an electrodynamic loudspeaker. The method comprises steps of generating an audio signal for application to a voice coil of the electrodynamic loudspeaker and adding a high-frequency probe signal to the audio signal to generate a composite drive signal. The method further comprises a step of applying the composite drive signal to the voice coil through an output amplifier and detecting a modulation level of a probe signal current flowing through the voice coil.

Method and detector of loudspeaker diaphragm excursion

Heart rate monitors are plagued by noisy photoplethysmography (PPG) data, which makes it difficult for the monitors to output a consistently accurate heart rate reading. Noise is often caused by motion. Using known methods for processing accelerometer readings that measure movement to filter out some of this noise may help, but not always. The present disclosure describes an improved front-end technique (time-domain interference removal) based on using adaptive linear prediction on accelerometer data to generate filters for filtering the PPG signal prior to tracking the frequency of the heartbeat (heart rate). The present disclosure also describes an improved back-end technique based on steering the frequency of a resonant filter in order to track the heartbeat. Implementing one or both of these techniques leads to more accurate heart rate measurements.

Time-domain interference removal for heart rate measurements

Growing community of inventors

Acton, MA, United States of America

Robert W Adams