Abstract: A light detection apparatus has an array of first light detectors arranged at a first interval and configured to convert reception light into first signals, second light detectors comprising a first crosstalk rate and configured to convert reception light into second signals, wherein surfaces of the second light detectors are shielded from light, third light detectors comprising a second crosstalk rate different from the first crosstalk rate and configured to convert reception light into third signals, wherein surfaces of the third light detectors are shielded from light, and control circuitry configured to control an operation point of the array based on the second signals and the third signals.

Abstract: A photo detection apparatus has an array of light detectors that can be switched to an ON state to enable output of a signal based on reception light or an OFF state to disable output of the signal based on reception light, and control circuitry configured to set one or more first light detectors inside a region specified according to overlapping of a region irradiated with light from a first direction and a region capable of detecting light to the ON state among the array of light detectors, when the light from the first direction is received by the array and set second light detectors outside of the specified region to the OFF state among the array of light detectors, when light from a first direction is received by the array.

Abstract: An electronic apparatus has a light detector configured to detect light by converting a reception photon into a signal and incapable of converting an additional photon into the signal during a recovery period after a reception of photons, a light projector configured to project light having a pulse width different from any of n times the recovery period (n is an integer of 1 or more), and a processor configured to measure a distance to a target object by using a time difference between a timing at which light is projected by the light projector and a timing at which light comprising a reflected wave is detected by the light detector, wherein the reflected wave is obtained by reflection of the light projected by the light projector onto the target object.

Abstract: A system has detection circuitry configured to detect position information on a first point and a second point of a reflective member based on a first primary reflected electromagnetic wave generated by a reflection of a first emitted pulse on the first point and a second primary reflected electromagnetic wave generated by a reflection of a second emitted pulse on the second point, and processing circuitry configured to estimate an angle of inclination of the reflective member relative to a reference surface of the detection circuitry based on the position information on the first point and the second point.

Abstract: A photodetection apparatus according to one embodiment has a photodetection element, first reset circuitry configured to select whether to set on-resistance between a first voltage node and a terminal of the photodetection element to a first value, second reset circuitry configured to select whether to set the on-resistance to a second value smaller than the first value, and control circuitry configured to set the on-resistance to the first value by the first reset circuitry after the photodetection element detects light, and set the on-resistance to the second value by the second reset circuitry after the first reset circuitry select to set the on-resistance to the first value.

Abstract: An electronic apparatus capable of determining a distance to an object based on reflected light provided by a reflection of a pulsed light on the object, includes input terminal configured to receive a signal of intensity of reception light. Processing circuitry determines a measurement range capable of specifying a peak of the reception light based on the intensity of the reception light, detects the reflected light by specifying the peak of the reception light within the measurement range, determines, based on the measurement range, a duration from when the pulsed light is emitted until when the reflected light is received, and determines a distance from the electronic apparatus to the object according to the duration.

Abstract: An electronic apparatus capable of determining a distance to an object based on at least first reflected light provided by a reflection of first pulsed light on the object and second reflected light provided by a reflection of a second pulsed light on the object has an input terminal to receive an electrical signal of intensity of reception light, and processing circuitry to specify, based on the electrical signal, a first duration from when the first pulsed light is emitted until when the first reflected light is received within a first measurement range, and determine, based on the first duration, a second measurement range of the second reflected light, specify, a second duration from when the second pulsed light is emitted until when the second reflected light is received within the second measurement range, and determine the distance from the electronic apparatus to the object.

Abstract: An electronic apparatus capable of determining a distance to an object based on reflected light provided by a reflection of pulsed light on the object has detectors configured to detect reception light to measure times from an emission of the pulsed light to detections of the reception light; and processing circuitry configured to determine a duration in which the reflected light is received based on the times, determine, based on one of the times in the duration, a reception timing of the reflected light included in the reception light, and determine the distance from the electronic apparatus to the object according to the reception timing of the reflected light.

Abstract: A semiconductor circuitry includes an oscillator configured to output an oscillation signal whose frequency depends on a first input signal, a counter configured to count a number of cycles of the oscillation signal, first circuitry configured to output a first digital signal based on a first number of cycles counted by the counter within one of a clock cycle of a clock signal, wherein the first input signal is digitally converted into the first digital signal, and a second circuitry configured to output a second digital signal based on a second number of cycles counted by the counter in a period from a reference timing of the clock signal to an input timing of a second input signal within the one of the clock cycle of the clock signal, wherein the period is digitally converted into the second digital signal.

Abstract: According to one embodiment, an electronic apparatus includes a light source, a detector, an equalizer and a processing circuitry. The light source is configured to emit a pulse having a first output value and a first frequency response. The detector is configured to detect a reflected wave of the pulse and convert the reflected wave to a first electric signal. The reflected wave of the pulse is received after the pulse is reflected by an object. The equalizer is configured to equalize the first electric signal using tap coefficients to generate a second electric signal. The tap coefficients are based on at least either one of the first output value and the first frequency response. The processing circuitry is configured to estimate a distance to the object based on the second electric signal.

Abstract: According to one embodiment, an electronic apparatus includes a first avalanche photo diode, a second avalanche photo diode, a first pulse circuit, a second pulse circuit, a first waveform shaping circuit, a second waveform shaping circuit and an adder. The first pulse circuit is configured to shape a signal of the first avalanche photo diode to a first pulse. The second pulse circuit is configured to shape a signal of the second avalanche photo diode to a second pulse. The first waveform shaping circuit is configured to shape the first pulse to a third pulse having a narrower frequency bandwidth than that of the first pulse. The second waveform shaping circuit is configured to shape the second pulse to a fourth pulse having a narrower frequency bandwidth than that of the second pulse. The adder is configured to add the third pulse and the fourth pulse.

Abstract: Time measuring circuitry has a ring oscillator, a time-to-digital converter, a time measurer and a phase randomizer. The ring oscillator has a plurality of delay circuitries connected in a ring shape, the ring oscillator adjusting delay times of the plurality of delay circuitries based on an oscillation control signal to generate an oscillation signal. The time-to-digital converter quantizes a phase of the oscillation signal at a transition timing of a reference signal. The phase synchronizing circuitry to generate the oscillation control signal based on an output signal of the time-to-digital converter so that a phase of the oscillation signal coincides with a phase of the reference signal. The time measurer to measure a time interval based on the output signal of the time-to-digital converter. The phase randomizer to randomly shift the phase of the oscillation signal to be locked by the phase synchronizing circuitry.

Abstract: According to an embodiment, a distance measuring apparatus includes an irradiator that emits an irradiation wave to a measuring target, a first detector that directly detects the irradiation wave, a second detector that detects a reflection wave, a simulation signal generator that generates a simulation signal, a first meter that measures a first time and an emission time of the irradiation wave, a second meter that measures a second time and an incidence time of the reflection wave, a first subtractor that subtracts the emission time from the incidence time to obtain a measurement time period, and that subtracts the first time from the second time to obtain an error time period and a second subtractor that subtracts the error time period from the measurement time period to obtain an offset measurement time period.

Abstract: According to an embodiment, a distance measuring apparatus includes an irradiator that emits an irradiation wave to a measuring target, a first detector that directly detects the irradiation wave, a second detector that detects a reflection wave, a simulation signal generator that generates a simulation signal, a first meter that measures a first time and an emission time of the irradiation wave, a second meter that measures a second time and an incidence time of the reflection wave, a first subtractor that subtracts the emission time from the incidence time to obtain a measurement time period, and that subtracts the first time from the second time to obtain an error time period and a second subtractor that subtracts the error time period from the measurement time period to obtain an offset measurement time period.

Abstract: An analog-to-digital converter has a switched capacitor comprising a capacitor to perform charging and discharging by switching a switch, the switched capacitor varying a charge amount of the capacitor in accordance with a frequency of an oscillation signal in accordance with a differential signal between an input signal and a feedback signal, capacitance of the capacitor, and a predetermined bias voltage, a feedback signal generator to generate the feedback signal based on an output signal of the switched capacitor, and a digital converter to generate a digital signal by digital conversion of the input signal based on the oscillation signal.

Abstract: An information processing device has a digital-to-pulse converter which outputs a pulse signal including a pulse having a pulse length in accordance with a digital input signal, and a selective oscillator which performs an oscillation operation while the pulse of the pulse signal is output and holds an oscillation operation state at a point of time where the output of the pulse is stopped.

Abstract: An analog-to-digital converter has a switched capacitor comprising a capacitor to perform charging and discharging by switching a switch, the switched capacitor varying a charge amount of the capacitor in accordance with a frequency of an oscillation signal in accordance with a differential signal between an input signal and a feedback signal, capacitance of the capacitor, and a predetermined bias voltage, a feedback signal generator to generate the feedback signal based on an output signal of the switched capacitor, and a digital converter to generate a digital signal by digital conversion of the input signal based on the oscillation signal.

Abstract: A time to digital converter has a counter to measure the number of cycles of a first signal, a first phase difference detector to generate a phase difference signal having a pulse width corresponding to a phase difference, a first capacitor to be charged with an electric charge, a second capacitor including capacitance N times the capacitance of the first capacitor, the N being a real number larger than 1, a comparator to compare a charge voltage of the first capacitor and a charge voltage of the second capacitor, a first charge controller to continue to charge the second capacitor until the comparator detects that the charge voltage of the second capacitor has reached the charge voltage of the first capacitor or more, and a first phase difference arithmetic unit to operate the phase difference between the first signal and the second signal.

Abstract: A DA converter has a first DA conversion unit that converts a first bit string signal corresponding to a MSB side string of a digital input signal into a first analog value, a second DA conversion unit that converts a second bit string signal corresponding to an LSB side string of the digital input signal into a second analog value, a third DA conversion unit that has identical circuitry configuration and identical circuitry area as the second DA conversion unit and converts a first digital signal into a third analog value, an analog calculator that calculates a value obtained by subtracting the third analog value from a value obtained by adding the second analog value to the first analog value, a quantizer that outputs a second digital signal obtained by quantizing an output value of the analog calculator, and a control logic unit that generates the first digital signal.

Abstract: An information processing device has a digital-to-pulse converter which outputs a pulse signal including a pulse having a pulse length in accordance with a digital input signal, and a selective oscillator which performs an oscillation operation while the pulse of the pulse signal is output and holds an oscillation operation state at a point of time where the output of the pulse is stopped.