Abstract: Devices, systems, and methods for non-invasively detecting and monitoring medical conditions using multiple modalities of sensing include at least two electrodes configured to be positioned on a subject, an acoustic sensor configured to be positioned on a subject, a thoracic impedance measurement module connected to the electrodes, for measuring a first impedance between the electrodes, and a heart acoustic measurement module connected to the acoustic sensor, for detecting and measuring a heart sound from the acoustic sensor.

Abstract: A current measurement system, comprising a plurality of parallel sensing circuits, each sensing circuit configured to measure a respective range of voltage corresponding to a current through a load, wherein each sensing circuit is triggered to initiate measurement of a voltage across the load in response to a buffer current through a common buffer reaching a respective threshold, a buffer circuit for inputting a virtual ground voltage or a virtual ground current to the load and to the plurality of parallel sensing circuits, the virtual ground voltage corresponding to the voltage across the load or the current through the load, and a processor coupled to the plurality of parallel sensing circuits, wherein the processor is configured to combine data representing voltage measurements from the plurality of parallel sensing circuits to determine the current through the load.

Abstract: A desaturation detection circuit is described that uses two or more desaturation circuit threshold values, which shifts the desaturation threshold value in a normal operational mode to a higher voltage when the active short circuit (ASC) signal is present in a faulted operational mode. Including two or more desaturation detection circuit threshold values allows a lower desaturation threshold value during a normal operational mode and a higher voltage in a faulted operational mode, or mode-dependent threshold value selection.

Abstract: A MEMS device is provided comprising a mass configured to move along a first axis and a second axis substantially perpendicular to the first axis; a drive structure coupled to the mass and configured to cause the mass to move along the first axis; a sense structure coupled to the mass and configured to detect motion of the mass along the second axis; a stress relief structure coupled to one of the drive structure or the sense structure; and at least one anchor coupled to an underlying substrate of the MEMS device, wherein the stress relief structure is coupled to the at least one anchor and the at least one anchor is disposed outside of the stress relief structure.

Abstract: Apparatus and methods for gyroscope signal demodulation are disclosed herein. In certain embodiments, a demodulation circuit for a microelectromechanical systems (MEMS) gyroscope includes a switched resistor filter that samples a gyroscope signal received from a microelectromechanical sensor. The switched resistor filter provides sampling with a controlled duty cycle and noise bandwidth limit to achieve high signal-to-noise ratio (SNR) performance.

Abstract: A connector assembly is disclosed. The connector assembly can include first and second connectors. The first connector can include a first electronic component mounted on a first component mount region of the first substrate. The second connector can include a second electronic component mounted on a second component mount region of the second substrate. The first connector and the second connector have different profiles from each other as seen from a top plan view, and can have wider middle portions that overlap when assembled. The first connector can be configured to connect to a sensor panel and a first external substrate or component. The second connector can be configured to connect to the sensor panel and a second external substrate or component.

Abstract: A device may include an intercept-temperature drift input to receive an intercept-temperature drift value. The device may further include a reference current generator that generates a reference current based at least in part on the intercept-temperature drift value. Additionally, the device may include an analog signal chain that adjusts a slope-temperature drift of the signal-strength detector by adjusting a delta proportional to absolute temperature of the analog signal chain.

Abstract: System and techniques to generate a cryptographic key specific to a type of hardware are described herein. Software distribution and execution can use cryptographic keys tailored to specific hardware. A secret is generated from a hardware public key. The secret is used to create software public and private keys. The secret is used to protect the data and the public key is distributed with the software for use on a class of hardware to which the hardware private key is applicable. The hardware then uses the software public key and a local copy of the hardware private key to find the secret and decrypt the software to run the software locally.

Abstract: One embodiment is a method for estimating an internal temperature of a battery, the method comprising obtaining multiple terminal impedance measurements, wherein each of the terminal impedance measurements is taken at a different one of a plurality of frequencies; determining model parameters for a multivariable polynomial regression model; and applying the multivariable polynomial regression model to the multiple terminal impedance measurements to estimate the internal temperature of the battery.

Abstract: Microelectromechanical systems (MEMS) yaw gyroscopes having out-of-plane quadrature trim electrodes are described. The gyroscope includes a proof mass configured to be driven in-plane. The proof mass includes an opening, or a plurality of openings. The out-of-plane quadrature trim electrodes are positioned to laterally overlap edges of the opening in a projection plane. The out-of-plane quadrature trim electrodes trim in-plane motion of the proof mass in one or two directions to limit quadrature motion. The out-of-plane quadrature trim electrodes may be arranged in a symmetric pattern to enable mode switching.

Abstract: Variable gain amplifiers (VGAs) with fine attenuation step control and flat signal-to-noise ratio (SNR) versus attenuation are provided. In certain embodiments, a VGA includes an input that receives a radio frequency (RF) input signal, a segmented amplification circuit including multiple amplification cells that operate in parallel to amplify the RF input signal to generate multiple amplified RF signals, an impedance ladder including multiple taps each connected to a different node of the impedance ladder, and switches that control routing of the amplified RF signals to one or more selected taps of the impedance ladder. Accordingly, the VGA uses the switches to connect the outputs of the segmented amplification circuit to the selected tap(s) of the impedance ladder. By changing the tap selection, the attenuation step of the VGA is controlled.

Abstract: A method for selecting one or more gain values in an electrochemical impedance spectroscopy (EIS) current measurement system to provide an improved signal-to-noise characteristic can include selecting a larger one of an electrochemical cell arrangement impedance indication value and a sense resistor arrangement impedance indication value and using the selected impedance indication value as a determined impedance indication value. The method can also include determining, for a plurality of gain setting combinations, an EIS excitation current value at which current measurement circuitry of the current measurement system will reach a specified amount of a non-saturation range of the current measurement system when measuring the determined impedance indication value.

Abstract: Systems, devices, and methods related to using model architecture search for hardware configuration are provided. An example apparatus includes an input node to receive an input signal; a pool of processing units to perform one or more arithmetic operations and one or more signal selection operations, wherein each of the processing units in the pool is associated with at least one parameterized model corresponding to a data transformation operation; and a control block to configure, based on a first parameterized model, a first subset of the processing units in the pool, where the first subset of the processing units processes the input signal to generate a first signal.

Abstract: Technologies are provided for identification of closed-loop gain response and compensation of power supply devices. In an aspect, a computing device can receive data indicative of a transient output voltage of a power supply device. The computing device also can determine frequency-domain loop response of a control loop of the power supply device by applying a machine-learned model to the data indicative of the transient output voltage. In addition, or in other aspects, the computing device also can adjust one or multiple compensation component(s) of the power supply device in order to achieve a satisfactory performance during operation of the power supply device.

Abstract: A flow control system is disclosed. The flow control system can include a flow meter positioned at a first location of a flow path of a fluid substance, and a valve positioned at a second location of the flow path of the fluid substance. The flow meter can include a molded non-conductive housing, a heating element that is at least partially embedded in the housing, and a sensing element that is at least partially embedded in the housing. The valve can open the flow path to allow the fluid substance to flow in the flow path. The valve can include an actuator that includes deformable chamber and a gate in the flow path of the fluid substance.

Abstract: Methods, and systems, are presented for a Structural Bridge for Electrically Isolated Metal Clips by mounting on a substrate a first and a second circuit. These first and second circuits can include Component on Package (CoP) electronic parts that are electrically contacted to the substrate with metal clips mounted on the surface of the substrate. The metal clips are electrically connected to respective circuit first and second circuits by an electrical connection on or in the substrate. The metal clips are folded over the respective first and second circuits. The folded-over portion of the first metal clip and the folded-over portion of the second metal clip are electrically isolated from each other. A third circuit package that is mounted on and electrically connected to a folded-over portion of the first metal clip and to a folded-over portion of the second metal clip.

Abstract: A power disconnect switch may include a first terminal configured to couple to a boost converter output and a second terminal configured to couple to a load. A comparator may include a first input terminal configured to couple to a source input, a second input terminal configured to couple to the boost converter output, and a first output terminal configured to output a signal indicating a condition of the boost converter output being less than or equal to the source input. A control circuit may include an input terminal coupled to the first output terminal of the comparator and a second output terminal coupled to the power disconnect switch. The control circuit may be configured to open the power disconnect switch in response to receiving the signal indicating the condition.

Abstract: Device for optically detecting smoke and implementing thereof. Apparatus and methods for detecting the presence of smoke in a small, long-lasting smoke detector are disclosed. Specifically, the present disclosure shows how to build a very compact housing around the smoke detector while keeping the reflections from the housing structure to a very low value while satisfying all the other peripheral needs of fast response to smoke and preventing ambient light. This allows very small measurements of light scattering of the smoke particles to be reliable in a device resistant to the negative effects of dust. In particular, geometrical optical elements, e.g., cap and optical defection elements, are disclosed.

Abstract: Presented are systems and methods for generating quadrature clock signals for high-speed signal processing and similar applications. In various embodiments, a first input signal is rotated by a first phase angle to obtain a first rotated signal that represents a first quadrature clock signal. A second input signal that is 180 degrees out-of-phase with the first signal is rotated by a second phase angle such as to produce a second rotated signal. The unaltered first input signal and the phase-shifted second signal are then combined to derive an interpolated signal. This interpolated signal may be used to generate a second quadrature clock signal. As a result, the presented systems and methods effectively addresses the challenges of low-jitter, high-accuracy clock signal generation in applications such as SERDES and other systems that require precise timing signals, thereby ensuring enhanced system performance, while reducing complexity and power consumption.

Abstract: A method of manufacturing a vertical inductor, the method comprising: forming a substrate, forming a bottom electrode, forming a dielectric layer, forming a magnetic core, forming insulation layer, forming a conductive loop structure by extending vertical interconnects through the insulation layer from a first side of the magnetic core to a second side of the magnetic core, electrically connecting the vertical interconnects to the bottom electrode on the second side of the magnetic core.