Density function centric signal processing

    公开(公告)号:US11184045B1

    公开(公告)日:2021-11-23

    申请号:US16853028

    申请日:2020-04-20

    Abstract: A circuit for direct current (DC) offset estimation comprises a quantile value circuit and a signal processor. The quantile value circuit determines a plurality of quantile values of an input signal and includes a plurality of quantile filters. Each quantile filter includes a comparator, a level shifter, a monotonic transfer function component, and a latched integrator. The comparator compares the input signal and a quantile value. The level shifter shifts the output of the comparator. The monotonic transfer function component determines the magnitude of the shifted signal and provide a transfer function signal. The latched integrator suppresses transient characteristics of the transfer function signal and provide the quantile value. The signal processor is configured to calculate a weighted average of the quantile values to yield a DC offset estimate.

    Advanced monitoring of an HVAC system

    公开(公告)号:US12085297B2

    公开(公告)日:2024-09-10

    申请号:US17962182

    申请日:2022-10-07

    CPC classification number: F24F11/49 F24F11/52 F24F11/58 F24F2140/60

    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for advanced monitoring of an HVAC system. In some implementations, a voltage measurement across at least two interface terminals of a thermostat that controls an HVAC system of a property is obtained. The voltage measurements are analyzed. A likely power cycling activity of a component of the HVAC system is determined based on analyzing the voltage measurements. Whether the HVAC system is operating properly is determined based on the likely power cycling activity of the component of the HVAC system. Data indicating whether the HVAC system is operating properly is generated and outputted based on determining whether the HVAC system is operating properly.

    Density function centric signal processing

    公开(公告)号:US10659095B2

    公开(公告)日:2020-05-19

    申请号:US15712768

    申请日:2017-09-22

    Abstract: A circuit for direct current (DC) offset estimation comprises a quantile value circuit and a signal processor. The quantile value circuit determines a plurality of quantile values of an input signal and includes a plurality of quantile filters. Each quantile filter includes a comparator, a level shifter, a monotonic transfer function component, and a latched integrator. The comparator compares the input signal and a quantile value. The level shifter shifts the output of the comparator. The monotonic transfer function component determines the magnitude of the shifted signal and provide a transfer function signal. The latched integrator suppresses transient characteristics of the transfer function signal and provide the quantile value. The signal processor is configured to calculate a weighted average of the quantile values to yield a DC offset estimate.

    Density function centric signal processing

    公开(公告)号:US09787341B2

    公开(公告)日:2017-10-10

    申请号:US14085898

    申请日:2013-11-21

    CPC classification number: H04B1/30 H04B2001/305

    Abstract: A circuit for direct current (DC) offset estimation comprises a quantile value circuit and a signal processor. The quantile value circuit determines a plurality of quantile values of an input signal and includes a plurality of quantile filters. Each quantile filter includes a comparator, a level shifter, a monotonic transfer function component, and a latched integrator. The comparator compares the input signal and a quantile value. The level shifter shifts the output of the comparator. The monotonic transfer function component determines the magnitude of the shifted signal and provide a transfer function signal. The latched integrator suppresses transient characteristics of the transfer function signal and provide the quantile value. The signal processor is configured to calculate a weighted average of the quantile values to yield a DC offset estimate.

    Advanced monitoring of an HVAC system

    公开(公告)号:US11493222B2

    公开(公告)日:2022-11-08

    申请号:US16883659

    申请日:2020-05-26

    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for advanced monitoring of an HVAC system. In some implementations, a voltage measurement across at least two interface terminals of a thermostat that controls an HVAC system of a property is obtained. The voltage measurements are analyzed. A likely power cycling activity of a component of the HVAC system is determined based on analyzing the voltage measurements. Whether the HVAC system is operating properly is determined based on the likely power cycling activity of the component of the HVAC system. Data indicating whether the HVAC system is operating properly is generated and outputted based on determining whether the HVAC system is operating properly.

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