Abstract: Various embodiments for the automatic detection of the presence of a protective case on an electronic device are provided herein. Generally, the electronic device includes one or more sensors; a device memory storing an application; a device processor, which upon execution of the application, is configured to: monitor, via at least one first sensor, a trigger condition for detecting the presence of the protective case; detect the trigger condition; in response to detecting the trigger condition, cause the electronic device to vibrate for a pre-determined period of time; collect, via at least one second sensor, sensor data during the pre-determined time; extract at least one feature from the sensor data; based on the extracted at least one feature, determine whether the protective case is applied to the electronic device; and generate an output indicating whether the protective case is applied to the electronic device.

Abstract: Apparatus and method that includes amplifiers for transceiver antenna elements, and more specifically to power amplifying an RF (radio frequency) signal using a distributed power amplifier having electronic devices (such as field-effect transistors) that are thermally and/or mechanically connected to each one of a plurality of antenna elements (also called coil elements) to form a hybrid coil-amplifier (e.g., for use in a magnetic-resonance (MR) imaging or spectroscopy machine), and that is optionally adjusted from a remote location, optionally including remotely adjusting its gains, electrical resistances, inductances, and/or capacitances (which controls the magnitude, phase, frequency, spatial profile, and temporal profile of the RF signal)—and, in some embodiments, the components are compatible with, and function in, high fields (such as a magnetic field of up to and exceeding one tesla or even ten tesla or more and/or an electric field of many thousands of volts per meter).