Provided is a physical quantity measurement device capable of reducing a frequency analysis error of a gas flow rate as compared with the related art. A physical quantity measurement device 20 includes a flow rate sensor 205 and a signal processing unit 260. The signal processing unit 260 has a buffer 261, an offset adjustment unit 262, a gain calculation unit 263, a correction calculation unit 264, and a frequency analysis unit 265. The buffer 261 stores a flow rate data based on an output signal of the flow rate sensor 205 for a predetermined period. The offset adjustment unit 262 adjusts the zero point of the flow rate waveform. The gain calculation unit 263 calculates a correction gain of the flow rate waveform whose zero point has been adjusted. The correction calculation unit 264 performs the correction by multiplying the flow rate waveform whose zero point has been adjusted by the correction gain. The frequency analysis unit 265 performs a frequency analysis calculation of the corrected flow rate waveform and stores the data obtained by the calculation in the buffer 261. The gain calculation unit 263 calculates the correction gain at which the overflow does not occur in the frequency analysis unit 265.

Provided is a physical quantity measurement device capable of reducing a frequency analysis error of a gas flow rate as compared with the related art. A physical quantity measurement device 20 includes a flow rate sensor 205 and a signal processing unit 260. The signal processing unit 260 has a buffer 261, an offset adjustment unit 262, a gain calculation unit 263, a correction calculation unit 264, and a frequency analysis unit 265. The buffer 261 stores a flow rate data based on an output signal of the flow rate sensor 205 for a predetermined period. The offset adjustment unit 262 adjusts the zero point of the flow rate waveform. The gain calculation unit 263 calculates a correction gain of the flow rate waveform whose zero point has been adjusted. The correction calculation unit 264 performs the correction by multiplying the flow rate waveform whose zero point has been adjusted by the correction gain. The frequency analysis unit 265 performs a frequency analysis calculation of the corrected flow rate waveform and stores the data obtained by the calculation in the buffer 261. The gain calculation unit 263 calculates the correction gain at which the overflow does not occur in the frequency analysis unit 265.

A MEMS device may output a signal during operation that may include an in-phase component and a quadrature component. An external signal having a phase that corresponds to the quadrature component may be applied to the MEMS device, such that the MEMS device outputs a signal having a modified in-phase component and a modified quadrature component. A phase error for the MEMS device may be determined based on the modified in-phase component and the modified quadrature component.

Systems, methods and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally one or more IDDQ and/or built-in-self test (BEST) circuits may be included.

The invention is directed to methods for radio frequency spectral analysis. Accordingly, flight instructions are executed on a first UAV to fly in a first flight pattern relative to a signal source. The first UAV detects radio signal(s) from the signal source and associated signal data. Flight instructions are concurrently executed on a second UAV to fly in a second flight pattern, relative to the first flight pattern of the first UAV. The second UAV also detects radio signal(s) from the signal source and associated signal data. The stored signal data from the drones may then be processed for visualization.

The present invention relates to a method for calibrating a receiver device or a stimulus-response system comprising a receiver device. The method comprises the steps of generating at least one tone with a repeatable and known phase value, said at least one tone being stepped in frequency to cover a given set of calibration tones, and applying the at least one tone to the receiver device or to the stimulus-response system, generating a reference signal, which is phase-coherent with the at least one tone, to measure in a phase-coherent way with the receiver device or with the stimulus-response system the at least one tone, measuring at least the phase of the at least one tone using the receiver device or the stimulus-response system, determining at least phase-related information for calibration coefficients at the given set of calibration tones by calculating a phase deviation of the measured phase from the known phase value of the at least one tone.

The present invention relates to a method for calibrating a receiver device or a stimulus-response system comprising a receiver device. The method comprises the steps of generating at least one tone with a repeatable and known phase value, said at least one tone being stepped in frequency to cover a given set of calibration tones, and applying the at least one tone to the receiver device or to the stimulus-response system, generating a reference signal, which is phase-coherent with the at least one tone, to measure in a phase-coherent way with the receiver device or with the stimulus-response system the at least one tone, measuring at least the phase of the at least one tone using the receiver device or the stimulus-response system, determining at least phase-related information for calibration coefficients at the given set of calibration tones by calculating a phase deviation of the measured phase from the known phase value of the at least one tone.

A ballast type detecting circuit includes a ballast signal clamping circuit coupled to a ballast, wherein the ballast signal clamping unit is configured to clamp an output of the ballast, and a ballast type detection circuit configured to compare first and second reference clocks and the clamped output of the ballast to determine a type of the ballast, each of the first and second reference clocks having a frequency lower than an output frequency of a first type ballast and higher than an output frequency of a second type ballast. Thus, the ballast type detecting circuit detects a type of electronic ballast and magnetic ballast based on a digital output signal and decreases a number of outside circuit elements through a ballast type detection based on a digital output signal.

A measuring system for measuring a high frequency signal is provided. The measuring system comprises an antenna module, adapted for receiving the high frequency signal. Moreover, the system comprises a detector module adapted for deriving a measuring signal from the high frequency signal. Finally, the system comprises a sensor module adapted for measuring the measuring signal. The sensor module is arranged in a housing, while the detector module is not arranged in the housing. The detector module is connected to the sensor module by a first cable, which is adapted to transmit the measuring signal from the detector module to the sensor module.

The present disclosure provides for a system and method for compensating an electronic oscillator for one or more environmental parameters. A method may comprise segmenting test data received from an output signal of the oscillator and generating at least one correction voltage to thereby compensate the oscillator for one or more environmental parameters. A system may comprise at least one multi-function segmented array compensation module configured to receive one or more output signals from an oscillator and generate one or more correction voltages to thereby compensate the oscillator for environmental parameters. The system may also comprise one or more sensors and a user EFC.