Abstract: An array of optical filters having a front side and a back side is disclosed. The array of optical filters includes first and second optical filters and a molding compound. The first and second optical filters each include a substrate having a back surface coplanar with the back side of the molding compound, and a filter layer having a front surface coplanar with the front side of the molding compound. The molding compound covers the sidewalls of the filter substrates and filter layers, and fills gaps between the filters.

Abstract: Systems and methods that integrate a directional coupling function with directivity that does not have output loss are disclosed. For example, a power amplifier circuit arrangement includes an input terminal to receive an input signal; amplifier circuitry including a first amplifier stage, a second amplifier stage, and a virtual ground node, where an input of the first amplifier stage is coupled to the input terminal, an output of the first amplifier stage is coupled to an input of the second amplifier stage via the virtual ground node, and an output of the second amplifier stage is coupled to the input of the first amplifier stage via feedback circuitry; an output terminal coupled to the output of the second amplifier stage, the output terminal to output an amplified signal; and a directional coupler terminal coupled to the virtual ground node.

Abstract: Various examples are directed to a frequency-compensated amplifier circuit comprising a first multi-stage amplifier comprising a first amplifier input node, a first amplifier output node, and a first amplifier intermediate node. A first feedback path between the first amplifier input node and the first amplifier output node comprises a feedback resistance. A second feedback path between the first amplifier output node and the first amplifier intermediate node comprises a first capacitor and a portion of the feedback resistance. A first switch circuit may be electrically coupled to the first capacitor and to the feedback resistance. The first switch circuit may have a first state in which the first capacitor is coupled to a first tap point of the feedback resistance and the portion of the feedback resistance has a first value.

Abstract: An electronic module is disclosed. The electronic module can include a package substrate, an integrated device die, a dam structure, and a mounting compound. The integrated device die can have an upper side, a lower side, and an outer side edge. The dam structure can have a first sidewall and a second sidewall opposite the first sidewall. The second sidewall can be nearer to the outer side edge than the first sidewall. The first sidewall can be laterally positioned between a center of the lower side of the integrated device die and the outer side edge. The dam structure can be disposed between a portion of the package substrate and a portion of the lower side of the integrated device die. The mounting compound can be disposed between the lower side of the integrated device die and the package substrate. The dam structure can be positioned between the mounting compound and the outer side edge of the integrated device die.

Abstract: Devices exchange control signals with each other to ensure proper operation of an overall system. For instance, in a communication system, a baseband processor and a transceiver communicate with each other to exchange information for controlling the respective signal processing parts of the baseband processor and the transceiver. While Serial Peripheral Interfaces (SPIs) can be used, SPI can be extremely slow, and does not provide a protocol for allowing a complex set of control signals to be exchanged between the baseband processor and transceiver. The present disclosure describes a fast control interface which can support various modes of operation in allowing two devices to communicate with each other quickly and effectively.

Abstract: An electronic circuit comprises an error amplifier and an overshoot and undershoot detection circuit. The error amplifier has an output stage including a differential input to single ended output amplifier that includes a frequency compensation resistor. A switch circuit is connected across the frequency compensation resistor that shunts the frequency compensation resistor when activated. The overshoot and undershoot detection circuit compares differential input nodes of the output amplifier to a baseline voltage signal and activates the switch circuit when detecting an overshoot condition or an undershoot condition using the baseline voltage signal.

Abstract: Aspects of the present application allow for measurement of a calibrated resistance for a resistive film in a sensing element, such that effects from contact resistance and background resistance drifts due to factors such as temperature, strain or aging can be reduced or eliminated. In some embodiments, by taking a plurality of two-terminal resistance measurements between various pairs of electrodes on a resistive film, a contact-resistance-independent resistance of a reference portion of the resistive film can be determined. Further, a contact-resistance-independent resistance of a sensing portion of the resistive film can be determined based on a plurality of two-terminal resistance measurements between pairs of electrodes. The resistance of the reference portion can be removed from the measured resistance of the sensing portion, such that variations in the reference portion resistance that are not caused by a sensed environmental condition may be compensated.

Abstract: An extensional mode electrostatic microelectromechanical systems (MEMS) gyroscope is described. The MEMS gyroscope operates in an extensional mode. The MEMS gyroscope comprises a vibrating ring structure that is electrostatically excited in the extensional mode.

Abstract: Provided herein are apparatus and methods for a multi-stage signal-processing circuit. The signal-processing circuit can include multiple configurable stages that can be cascaded and configured to process an input signal. Control circuitry can be used to select an output of the configurable stages. Serial data can be recovered with good signal integrity using a signal monitor with the configurable stages by virtually placing the signal monitor on a buffered output node.

Abstract: Systems and methods for improving noise efficiency in a Delta Sigma modulator. A bypass scheme for a noise splitter is disclosed that reduces toggling activity for small signals. In particular, a sample-by-sample bypass noise splitter is disclosed that includes a noise splitting module and a bypass line. The bypass line bypasses the noise splitting module when signals are below a selected threshold, increasing efficiency of the system.

Abstract: A chest-worn sensor device, such as a device for daily at-home monitoring of cardiopulmonary health conditions, includes an audio and/or visual interface that provides cues to assist a user in performing a measurement sequence. The sensor device may detect whether there are any body posture issues or device contact issues. In response to detecting an issue, the sensor device provides and audio and/or visual cue to the user indicating the issue. The sensor device may provide additional cues throughout the measurement sequence, such as a cue that a measurement is being taken, a cue for the user to change body posture, and a cue for the user to remove the sensor device.

Abstract: A current sensing technique for coupled inductors in switching regulator circuits, where the current sensing technique can provide the current information needed for a power converter design and can be implemented as a real-world solution. The current sensing techniques can provide complete information of the coupled inductor current, such as peak current, valley current, and intermediate ripples. The current sensing techniques can use a simple RC network, such as two resistors and two capacitors for 2-phase operation. The techniques, however, are not limited to two-phase operation. The current sensing techniques of this disclosure can be extended to power stage assembly implementations, e.g., DrMOS modules, with current output in order to increase signal-to-noise ratio, which is significant for reliable control. In addition, the current sensing techniques of this disclosure can be extended to multi-phase operation, such as three or more phases.

Abstract: Apparatus and methods for high-speed drivers are provided herein. In certain embodiments, a high-speed driver multiplexes two or more data streams. The high-speed driver is implemented with a mux-then-driver topology that provides multiplexing in a predriver circuit. Thus, the multiplexer is eliminated from the full rate output path to relax timing. Driver amplitude control schemes are also disclosed in which a controllable driver includes a group of differential series source transistor (SST) driver slices that are connected in parallel with one another to drive a pair of output terminals, and a group of attenuator slices that are connected in parallel with one another across the pair of output terminals. Additionally, the controllable driver includes a control circuit that activates an attenuator slice for each SST driver slice that is decommissioned to provide output amplitude control.

Abstract: The present disclosure provides apparatuses and methods for analyzing the presence of a target analyte. The apparatuses and methods of the present disclosure can be operated in a multiplexed format to perform various assays of clinical significance.

Abstract: A multiple operating-mode comparator system can be useful for high bandwidth and low power automated testing. The system can include a gain stage configured to drive a high impedance input of a comparator output stage, wherein the gain stage includes a differential switching stage coupled to an adjustable impedance circuit, and an impedance magnitude characteristic of the adjustable impedance circuit corresponds to a bandwidth characteristic of the gain stage. The comparator output stage can include a buffer circuit coupled to a low impedance comparator output node. The buffer circuit can provide a reference voltage for a switched output signal at the output node in a higher speed mode, and the buffer circuit can provide the switched output signal at the output node in a lower power mode.

Abstract: Methods and apparatus are disclosed for communicating multiple logic states across a digital isolator. The digital isolator is a universal serial bus (USB) isolator in some embodiments. The digital isolator includes one or more single-bit data channels. Three or more logic states of information are transmitted across the single-bit data channel(s). The logic states are distinguished by a pulse sequence, and in particular a number of edges of the pulse sequence and a final value or final edge of the pulse sequence.

Abstract: A hybrid silicon carbide (SiC) device includes a first device structure having a first substrate comprising SiC of a first conductivity type and a first SiC layer of the first conductivity type, where the first SiC layer is formed on a face of the first substrate. The first device structure also includes a second SiC layer of a second conductivity type that is formed on a face of the first SiC layer and a first contact region of the first conductivity type, where the first contact region traverses the second SiC layer and contacts the first SiC. The device also includes a second device structure that is bonded to the first device structure. The second device structure includes a switching device formed on a second substrate and a second contact region that traverses a first terminal region of the switching device and contacts the first contact region.

Abstract: Herein disclosed is an example analog-to-digital converter (ADC) and methods that may be performed by the ADC. The ADC may derive a first code that approximates a combination of an analog input value of the ADC and a dither value for the ADC sampled on a capacitor array. The ADC may further derive a second code to represent a residue of the combination with respect to the first code applied to the capacitor array. The ADC may combine the numerical value of the first code and the numerical value of the second code to produce a combined code applied to the capacitor array for deriving a digital output code. Combining the numerical value of the first code and the numerical value of the second code in the digital domain can provide for greater analog-to-digital (A/D) conversion linearity.

Abstract: An energy-efficient multiplication circuit uses analog multipliers and adders to reduce the distance that data has to move and the number of times that the data has to be moved when performing matrix multiplications in the analog domain. The multiplication circuit is tailored to bitwise multiply the innermost product of a rearranged matrix formula generate a matrix multiplication result in form of a current that is then digitized for further processing.

Abstract: Device for improving an optical detecting smoke apparatus 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 one or more optimized blocking members in a smoke detector to augment signal to noise ratio. This is performed 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.