Integrating Accelerometers into Wearable Devices

Technical overview of integrating accelerometers into wearable designs, covering MEMS devices (MMA3202), multi-axis inertial modules, interfaces (SPI/I2C), and PCB integration.

Planar Reflectarray Antenna Co-simulated with MATLAB and HFSS

Single-layer windmill unit for reflectarray antenna achieving 473.6° linear phase range; 80×80 mm Ka-band prototype (400 elements) shows 27.86 dBi gain and 35.7% 3 dB bandwidth.

Digital Twin Integration for Steel Pipe Production with 5G and Industrial Internet

Framework for applying 5G to straight?seam steel pipe production: networking, unique identification, equipment upgrades, and digital twin virtual lines.

700-nA Quiescent Current Enables Always-On Wearable Designs

TI bq25120 battery management solution for wearables and IoT: integrated charger, low 700 nA quiescent current, I2C-configurable LDO/buck and battery monitor.

Measuring Heart Rate and SpO2 with MAXREFDES117

MAXREFDES117 reference design for wearable PPG heart rate and SpO2 monitoring using the MAX30102 sensor; includes low-power hardware, Arduino/mbed firmware and test results.

Improving Battery Life for Wearable Devices

Overview of ultra-low-power power conversion for wearables, covering LDOs, buck-boost and boost DC-DC converters, low-power MCUs and sensor front-ends.

Runxin Ultra-Low-Power MCU with BLE Solution

Overview of ultra-low-power MCU technology (SPOT) and low-power BLE solutions, including BLE 5.2 and LE Audio, for always-online IoT and wearable devices.

5G Filter Tuning and Debugging Methods

Practical guide to 5G filters: design preparation, manufacturing adjustments, testing and verification techniques for diagnosing and tuning filter performance.

Bluetooth Solutions for Wearable Devices

Technical guide to Bluetooth Low Energy for wearable devices, comparing BLE vs BR/EDR, GATT roles and reference designs like nRF51822 and TI CC256x.

Wearables in the Wireless Charging Market

Overview of wireless charging technology and market adoption across wearables, automotive and mobile devices, highlighting receivers, transmitters and coils.

Acoustic Source Separation Improves Speech Recognition

Overview of acoustic source separation techniques for embedded devices, detailing DNN and cochlear (CASA) methods to improve speech recognition in noisy environments.

Improving Multi-Sensor Readout Using Phase Division Multiplexing

Phase-division multiplexing (PDM) using maximal-length (ML) sequences to improve SNR and per-source sampling efficiency in reflective pulse oximetry versus TDM.

Understanding RF and Microwave Concepts Simply

Technical overview of RF propagation phenomena: electromagnetic waves, direct/reflected/diffracted/scattered waves, skin effect, Fresnel zones, multipath and slow/fast fading.

Reducing Display Power with Parallel Asynchronous SRAM

Technical guide to reducing display power in wearables: optimizing frame buffer memory, controller integration, and low-power serial memories (Quad SPI F-RAM)

5G Edge Gateway for Energy Storage Monitoring

Online energy storage monitoring solution using a 5G edge gateway: architecture and design for environment, energy, equipment and security monitoring at storage stations.

Single-Point Fingertip Pulse for Arterial Stiffness

Single-point heart-to-fingertip PWV (hfPWV) measured with an ion-electronic flexible pressure sensor for continuous PWV monitoring and arterial stiffness assessment.

Peak and Onset Detection for Heart Rate Monitoring

Robust peak and onset detection for beat-to-beat PPG (PRV) on the ADI wristwatch platform; validated vs ECG with coverage, sensitivity, PPV and RMSSD metrics.

Optimizing Power Consumption in IoT Wearables

DC/DC converter strategies for IoT wearables, analyzing hysteretic control and hybrid converters to balance fast transient response, low quiescent power, and controlled noise.

Electromagnetic Information Theory Research Framework

Electromagnetic information theory framework for next-generation wireless: foundational theories, methods, key technologies and applications for Massive MIMO.

PCB Design Considerations for Wearable Devices

Practical guide to wearable PCBs covering substrate choices (FR4 vs Rogers), manufacturing tolerance, RF design, and RF transmission lines like microstrip and coplanar waveguide