Abstract: A sensor driver providing high power supply rejection ratio is provided herein. A circuit can include a charge pump that comprises an input terminal and an output terminal, wherein the input terminal is operatively connected to a voltage supply. The charge pump further comprises circuitry that decouples an input voltage from the voltage supply from an output voltage of the charge pump and mixes defined frequency disturbances back to baseband. The circuit also includes an error amplifier configured to provide high power supply rejection ratio at baseband, wherein the output terminal of the charge pump is operatively connected to an input node of the error amplifier. Further, the circuit includes a capacitive micro-electromechanical system sensor operatively connected to an output node of the error amplifier.

Abstract: Disclosed embodiments provide backpower-safe test switches, devices, systems, and methods. By maintaining high impedance on an existing communications bus integrated circuit pin, disclosed embodiments prevent backpower of integrated circuits even when the integrated circuits are powered off. In a non-limiting aspect, disclosed embodiments facilitate increased final ASIC test coverage by facilitating multiplexing analog test bus on an existing ASIC pin.

Abstract: A continuous time single drive capacitance-to-voltage (C2V) converter can be employed for single sensor, balanced single sensor, or differential sensor. First sensor and/or second sensor can be employed to sense a condition. A capacitive bridge can comprise a first capacitive digital-to-analog-converter (DAC) and second capacitive DAC as a differential node. First capacitive DAC can be associated with first sensor, and second capacitive DAC can be associated with a third capacitive DAC, in series with first sensor, if single sensor is implemented or the second sensor if balanced single sensor or differential sensor is implemented. Capacitive bridge can be connected to differential input of a capacitive feedback amplifier that can be a continuous time amplifier with no signal sampling and no noise folding. Capacitive feedback amplifier can comprise capacitively coupled input common mode feedback, which can remove noise from a sensor drive, and output common mode feedback.

Abstract: A device includes a housing unit with an internal volume. The device further includes a sensor coupled to a substrate via an electrical coupling, wherein the sensor is disposed within the internal volume of the housing unit, and wherein the sensor is in communication with an external environment of the housing unit from a side other than a side associated with the substrate. The device also includes a moisture detection unit electrically coupled to the sensor, wherein the moisture detection unit comprises at least two looped wires at different heights, and wherein the moisture detection unit is configured to detect presence of a moisture within an interior environment of the housing unit when the moisture detection unit becomes in direct contact with the moisture.

Abstract: An output signal driver includes a positive output node, a negative output node, a power supply input node, a power supply common node, a charging capacitor, a discharging capacitor, a current source, a current sink, a first switch, a second switch, and a controller. The charging capacitor is coupled to the power supply input node. The discharging capacitor is coupled to the negative output node. The current source is coupled between the power supply input node and the positive output node. The current sink is coupled between the positive output node and the power supply common node. The first switch is coupled in parallel with the current source. The second switch is coupled in parallel with the current sink. The controller is coupled to the current source, the current sink, the first switch, and the second switch to apply either complementary constant current pulses or complementary constant voltage pulses to the positive output node.

Abstract: A device includes a sensor signal input node and a high-pass filter stage. The high-pass filter stage includes an operational amplifier and a feedback integrator. The operational amplifier includes an input node coupled to the sensor signal input node. The feedback integrator is coupled between an output node of the operational amplifier and the input node of the operational amplifier to set a high-pass pole frequency of the high-pass filter stage.

Abstract: A device includes a housing unit with an internal volume. The device further includes a sensor coupled to a substrate via an electrical coupling, wherein the sensor is disposed within the internal volume of the housing unit, and wherein the sensor is in communication with an external environment of the housing unit from a side other than a side associated with the substrate. The device also includes a moisture detection unit electrically coupled to the sensor, wherein the moisture detection unit comprises at least two looped wires at different heights, and wherein the moisture detection unit is configured to detect presence of a moisture within an interior environment of the housing unit when the moisture detection unit becomes in direct contact with the moisture.

Abstract: A device includes a housing unit with an internal volume. The device further includes a sensor coupled to a substrate via an electrical coupling, wherein the sensor is disposed within the internal volume of the housing unit, and wherein the sensor is in communication with an external environment of the housing unit from a side other than a side associated with the substrate. The device also includes a moisture detection unit electrically coupled to the sensor, wherein the moisture detection unit comprises at least two looped wires forming electrodes, and wherein the moisture detection unit is configured to detect presence of a moisture within an interior environment of the housing unit by measuring a capacitance between the electrodes and by detecting a change between the measured capacitance and a capacitance between the electrodes in absence of moisture.

Abstract: A device includes a sensor die, an electrical coupling, a substrate, a liquid detection unit, and a housing unit. The sensor die is coupled to the substrate via the electrical coupling. The liquid detection unit electrically is coupled to the sensor die. The housing unit and the substrate are configured to house the sensor die, the liquid detection unit, and the electrical coupling. The housing unit comprises an opening that exposes the sensor die to an environment external to the housing unit. The liquid detection unit detects presence of liquid within an interior environment of the housing unit. In some embodiments, the device further includes a gel filled within the interior environment of the housing unit covering the sensor die and the substrate. The gel, e.g., silicone, fluoro silicone, etc., is configured to protect the sensor die, the electrical coupling, and the substrate from exposure to the liquid.

Abstract: A device includes a sensor die, an electrical coupling, a substrate, a liquid detection unit, and a housing unit. The sensor die is coupled to the substrate via the electrical coupling. The liquid detection unit electrically is coupled to the sensor die. The housing unit and the substrate are configured to house the sensor die, the liquid detection unit, and the electrical coupling. The housing unit comprises an opening that exposes the sensor die to an environment external to the housing unit. The liquid detection unit detects presence of liquid within an interior environment of the housing unit. In some embodiments, the device further includes a gel filled within the interior environment of the housing unit covering the sensor die and the substrate. The gel, e.g., silicone, fluoro silicone, etc., is configured to protect the sensor die, the electrical coupling, and the substrate from exposure to the liquid.

Abstract: A power amplifier includes a comparator (COMP) to which an input signal is applied, a digital buffer (BUF) coupled via a feedback low-pass filter (LPFB) to a second input terminal (Cin2) of the comparator (COMP). An unstable loop is thereby created with an oscillation frequency related to the bandwidth of the feedback low-pass filter. In the presence of an input signal this self-oscillation frequency linearizes the system resulting in a power amplifier with excellent power efficiency. In a differential version two of these self-oscillating loops are provided. The coupling of the two loops thereby withholds the high-frequency self-oscillation from the load.

Abstract: A power amplifier includes a comparator (COMP) to which an input signal is applied , a digital buffer (BUF) coupled via a feedback low-pass filter (LPFB) to a second input terminal (Cin2) of said comparator (COMP). An unstable loop is thereby created with an oscillation frequency related to the bandwidth of the feedback low-pass filter. In the presence of an input signal this self-oscillation frequency linearizes the system resulting in a power amplifier with excellent power efficiency. In a differential version two of these self-oscillating loops are provided . The coupling of the two loops thereby withhelds the high-frequency self-oscillation from the load.