Abstract: A device includes a communication interface, a command processing circuit, a clock synchronization circuit, and a controllable clock source. The command processing circuit has a command input, a reference frequency output, and a reference phase output. The command input is coupled to the communication interface. The clock synchronization circuit has a reference frequency input, a reference phase input, and a frequency control output. The reference frequency output is coupled to the reference frequency input, and the reference phase input coupled to the reference phase output. The clock synchronization circuit includes a frequency synchronization circuit and a phase synchronization circuit. The controllable clock source has a frequency control input and a clock output. The frequency control input is coupled to the frequency control output.

Abstract: A method includes receiving a first measurement signal representing a first time between transitions of a motor commutation state. The method further includes receiving a second measurement signal representing a second time between transitions of a motor floating terminal voltage. The method further includes determining a motor speed state based on a combination of the first and second measurement signals, determining a motor commutation state based on the motor speed state and the motor floating terminal voltage; and providing a control signal to a motor inverter based on the motor commutations state.

Abstract: An apparatus includes a charge transfer circuit, a control circuit, and a processing circuit. The charge transfer circuit has a first terminal, a second terminal, a third terminal, and a control input. The control circuit has a control output coupled to the control input. The processing circuit has a first input, a second input, and an output. The processing circuit is configured to receive a first signal at the first input and receive a second signal at the second input. The first signal represents a current through the charge transfer circuit. The second signal represents at least one of a first voltage between the first and second terminals or a second voltage between the second and third terminals. The processing circuit is also configured to provide a third signal based on the first and second signals at the output.

Abstract: An optical distance measuring system includes a first transmitter, a first solid state device, and a receiver. The first transmitter is configured to generate a first optical waveform. The first solid state device is configured to receive the first optical waveform and steer the first optical waveform toward a target object. The receiver is configured to receive the first optical waveform reflected off of the first target object and determine a distance to the first target object based on a time of flight from the transmitter to the first target object and back to the receiver.

Abstract: Methods, apparatus, systems are described in conjunction with a watertight housing designed for ultrasonic lens cleaning. An example apparatus includes a transducer having a surface and an opening; a bracket having a first surface, a second surface, a third surface, and an opening, the first surface of the bracket coupled to the surface of the transducer, the opening of the bracket aligned with the opening of the transducer; and a lens having a first surface and a second surface, the first surface of the lens is coupled to the second surface of the bracket, the second surface of the lens coupled to the third surface of the bracket, the lens covering the opening of the transducer and the opening of the bracket.

Abstract: An apparatus includes a measurement circuit, a high-pass filter circuit, and a processing circuit. The measurement circuit is configured to receive an electrical signal of a device under test (DUT) and generate a measurement signal representing the electrical signal. The high-pass filter circuit is configured to perform a high-pass filtering operation on the electrical signal or the measurement signal to generate a filtered measurement signal. The processing circuit is configured to generate a measurement spectrum of the DUT based on the filtered measurement signal.

Abstract: A transducer system with a transducer and circuitry for applying a waveform to excite the transducer during an excitation period. The applying circuitry also comprises circuitry for changing a frequency of the waveform during the excitation period.

Abstract: An example apparatus includes: machine-readable instructions; and programmable circuitry configured to at least one of instantiate or execute the machine-readable instructions to: receive burst excitation information including a burst start frequency, a burst stop frequency, and a burst duration, the burst start frequency and the burst stop frequency defining a range of frequencies of the burst excitation information; generate first and second sub burst excitation information based on the burst excitation information, the first and second sub burst excitation information including a sub burst duration based on the burst duration, a temperature sense interval, and a temperature sense duration, the temperature sense interval being a time between temperature measurements, the temperature sense duration being a time of a temperature measurement; and generate an excitation signal responsive to the first and second sub burst excitation information and temperature measurements, the excitation signal having frequenci

Abstract: In described examples, a method includes receiving light from a field of view on a spatial light modulator that includes a two-dimensional array of picture elements in rows and columns; and determining a portion of the two-dimensional array that corresponds to a region of interest in response to a transmit scan beam illuminating the field of view. The method also includes directing light from the portion of the two-dimensional array to a photodiode, and directing light outside the portion away from the photodiode.

Abstract: In described examples, a system (e.g., a security system or a vehicle operator assistance system) is configured to configure a phased spatial light modulator (SLM) to generate a diffraction pattern. A coherent light source is optically coupled to direct coherent light upon the SLM. The SLM is configured to project diffracted coherent light toward a region of interest. An optical element is configured to focus the diffracted coherent light toward the at least one region of interest.

Abstract: An optical distance measurement system includes a transmission circuit and a receive circuit. The transmission circuit is configured to generate narrowband intensity modulated light transmission signals over a first band of frequencies and direct the narrowband light transmission signal toward a target object. The receive circuit is configured to receive reflected light off the target object, convert the reflected light into a current signal proportional to the intensity of the reflected light, filter frequencies outside a second band of frequencies from the current signal to create a filtered current signal, and convert the filtered current signal into a voltage signal. The second band of frequencies corresponds with the first band of frequencies.

Abstract: A transducer system. The system comprises a transducer and circuitry for applying an excitation waveform to excite the transducer during an excitation period. The circuitry for applying has: (i) circuitry for applying a first waveform at a first frequency; and (ii) circuitry for applying a second waveform at a second frequency differing from the first frequency.

Abstract: An optical distance measurement system includes a transmission circuit and a receive circuit. The transmission circuit is configured to generate narrowband intensity modulated light transmission signals over a first band of frequencies and direct the narrowband light transmission signal toward a target object. The receive circuit is configured to receive reflected light off the target object, convert the reflected light into a current signal proportional to the intensity of the reflected light, filter frequencies outside a second band of frequencies from the current signal to create a filtered current signal, and convert the filtered current signal into a voltage signal. The second band of frequencies corresponds with the first band of frequencies.

Abstract: An optical time of flight system includes a transmitter and a receiver. The transmitter is configured to generate a modulation signal having a modulation signal frequency that varies as a function of time, generate an optical waveform with amplitude modulation corresponding to the modulation signal, and direct the optical waveform toward a field of view (FOV). The receiver is configured to receive the optical waveform reflected off of an object within the FOV and determine a distance to the object based on a time of flight from the transmitter to the object and back to the receiver.

Abstract: A transducer system with a transducer and circuitry for applying a waveform to excite the transducer during an excitation period. The applying circuitry also comprises circuitry for changing a frequency of the waveform during the excitation period.

Abstract: A method includes reading first and second timer count values from a timer. The first timer count value is associated with a first time point, and the second timer count value is associated with a second time point. Also, the method includes calculating a difference between the first and the second timer count values, and determining whether the difference is within a range. The range is based on a desired executing frequency to perform a computing task, a variation of the desired executing frequency, and a timer frequency. Further, based on the difference not being within the range, the method includes setting an error flag value to be true and incrementing an error count value.

Abstract: An example apparatus includes a transducer to receive a reference signal and a reflected signal, the reflected signal being the reference signal after being reflected of a target; a filter to generate a band-pass reference signal and a band-pass reflected signal by filtering (A) reference signal samples associated with the reference signal and (B) reflected signal samples associated with the reflected signal; a correlator to generate a first correlation by correlating the reference signal samples with the reflected signal samples and a second correlation by correlating the band-pass reference signal with the band-pass reflected signal; and a delay estimator to determine a distance to the target based on the first correlation (coarse delay) and the second correlation (fine delay) and output a signal including the distance to the target.

Abstract: Described examples include an integrated circuit having an analog-to-digital converter operable to receive an input signal derived from a light signal and convert the input signal to a digital received signal, the analog-to-digital converter operable to receive the input signal during at least one window. The integrated circuit further has a receiver operable to receive the digital received signal, the receiver operable to determine a distance estimate of an object from which the light signal is reflected based on the digital received signal. In an example, the window locations are chosen to correspond to the locations of maximum slope in the signal.

Abstract: A transducer system with a transducer and circuitry for applying a waveform to excite the transducer during an excitation period. The applying circuitry also comprises circuitry for changing a frequency of the waveform during the excitation period.

Abstract: An optical distance measuring system includes a first transmitter, a first solid state device, and a receiver. The first transmitter is configured to generate a first optical waveform. The first solid state device is configured to receive the first optical waveform and steer the first optical waveform toward a target object. The receiver is configured to receive the first optical waveform reflected off of the first target object and determine a distance to the first target object based on a time of flight from the transmitter to the first target object and back to the receiver.