Abstract: A method, computer program product and/or system is disclosed. According to an aspect of this invention, a device under test (DUT) is switched to a functional test mode. In some embodiments of the present invention, the DUT receives a general scan design (GSD) pattern while in the functional test mode. In some embodiments, the DUT executes a first functional test corresponding to the GSD pattern. In yet other embodiments, the DUT further comprises a state machine that controls the execution of the first functional test. The DUT may further store the output address, the output data, and the status to an address register, a data register, and a status register, respectively and/or send the output address, the output data, and the status to an address register to an automatic testing equipment (ATE).

Abstract: A flip flop includes a data input, a clock input, a test chain input, a test chain output, a monitoring circuit, and an alert transmission circuit. The monitoring circuit is adapted to generate an alert if the time between arrival of a data bit and a clock edge is less than a threshold. The alert transmission circuit is adapted to apply during a monitoring phase an alert level to the test chain output in the event of an alert generated by the monitoring circuit, and to apply the alert level to the test chain output when an alert level is received at the test chain input.

Abstract: Integrated circuits may include partial reconfiguration (PR) circuitry for reconfiguring only a portion of a memory array. In some applications, partial reconfiguration may be performed during user mode. During partial reconfiguration, write assist techniques such as varying the power supply voltage may be applied to help increase write margin, but doing so can potentially affect the performance of in-operation pass gates that are being controlled by the memory array during user mode. In one suitable arrangement, ground power supply voltage write assist techniques may be implemented on memory cells that include p-channel access transistors and that are used to control n-channel pass transistors. In another suitable arrangement, positive power supply voltage write assist techniques may be implemented on memory cells that include n-channel access transistors and that are used to control p-channel pass transistors.

Abstract: A remote blade closing detector switch is positioned on or near the jaws of an electric power disconnect switch, where proper seating of the blade in the jaws activates a detector switch. An extended conductor lead electrically connects the detector switch an RFID tag placed in a convenient reading location. The detector switch is configured to control a data signal, power to the antenna of the RFID tag, the power supply to the RFID tag, or a data signal between an RFID chip and an antenna as mechanisms for enabling and disabling the tag to report a status indicator. An antenna tuning compensator may be utilized to compensate for the impedance of the long conductor lead connected to the antenna. A noise filter may also be used to suppress electrical noise picked up by the long conductor lead in the harsh electrical environment of the disconnect switch.

Abstract: An electrical switching device including an input connection land, an output connection land, and a connection member that is capable of switching between a closed position allowing an electric current to flow between the input and output connection lands and an open position preventing the flow of the current between the input and output connection lands. The electrical switching device includes an accelerometer that is capable of measuring a component of an acceleration of the switching device when switching the connection member between the closed and open positions and a control configured to estimate, on the basis of an acceleration measurement signal delivered by the accelerometer, a duration of switching of the connection member between the closed and open positions, and to determine wear on the switching device on the basis of the estimated switching duration.

Abstract: Apparatus featuring a signal processor or signal processing module configured to: receive signaling containing information about a sampled leakage magnetic flux sensed from a motor, a motor load profile containing a learned leakage magnetic flux sensed from the motor and stored during a learning stage, and a user selectable band of tolerance related to the motor load profile to trigger an alarm condition for the motor; and determine corresponding signaling containing information about whether to trigger the alarm condition for the motor if the sampled leakage magnetic flux is outside the user selectable band of tolerance of the motor load profile, based upon the signaling received. The leakage magnetic flux may be sensed by, and/or received from, a motor flux leakage sensor arranged on an external surface of a frame of the motor.

Abstract: An artificial intelligent fuel cell system according to an exemplary embodiment of the present invention may include: a fuel cell stack in which a plurality of unit cells is combined for generating electric energy with an electrochemical reaction; a sensor unit which measures in real time data about each of the unit cells forming the fuel cell stack, temperature, pressure, humidity, and flow rates of reaction gases, and cooling water, and current and voltage data during an operation of a fuel cell; an artificial intelligent unit which collects the data measured by the sensor unit with a predetermined time interval, generates a model for predicting and controlling performance of the fuel cell through the learning and analysis of the collected data, compares the generated model with the data measured in real time and diagnoses a state of the fuel cell stack, and generates a control signal for changing an operation condition of the fuel cell stack; and a control unit which changes the operation condition of the

Abstract: A method for determining a fault state of a battery, which method is based on a calculation of a differential conductance. An associated battery sensor and to an associated onboard power supply system is also disclosed.

Abstract: In accordance with an embodiment, an information processing apparatus includes a housing having an insertion slot for a detachable battery, a monitoring device configured to monitor power supplied from an external power source, a charger configured to charge the battery with the supplied from the external power source, and a controller. When the power from the external power source stops, the controller stores data in a volatile memory in a non-volatile memory using power supplied from the battery. The controller also checks a status of the battery, and issues a notification depending on the status of the battery.

Abstract: The secondary battery degradation determination device includes: a plurality of voltage sensors connected to the respective batteries; a discharging circuit connected in parallel to each battery group; and a discharge controller. The discharge controller drives a switching element so as to open and close such that current flowing in the discharging circuit has a pulse shape or the like. Each voltage sensor measures a voltage value of the AC component. On the basis of the measurement value, the internal resistance calculation section calculates an internal resistance, and a determination section determines degradation of the battery on the basis of the internal resistance.

Abstract: A voltage regulator controller includes a first pin for receiving aggregate temperature information from a plurality of power stages, a plurality of second pins each for receiving phase current information from one of the power stages, control circuitry for controlling the power stages, detection circuitry for detecting signal levels at the first and second pins, and fault analysis circuitry for identifying the type of reported fault and the power stage that reported the fault based on the detected signal levels at the first and second pins and state information accessible by the controller. Aggregate temperature information is reported at the first pin in a first nominal range, and phase current information is reported at each of the second pins in a second nominal range. Each reported fault type has a unique fault signature at the first and second pins, which is outside at least one of the nominal ranges.

Abstract: A magnetic field sensing device including a substrate, a plurality of magnetic flux concentrators and a plurality of magneto-resistive sensors and a plurality of magnetic setting structures is provided. The magnetic flux concentrators, the magneto-resistive sensors and the magnetic setting structures are disposed on the substrate. At least a portion of the magneto resistive sensors is disposed at two opposite sides of each of the magnetic flux concentrators. The orthogonal projection regions of each of the magnetic flux concentrators, at least a portion of the magneto-resistive sensors, and each of the magnetic setting structures on the substrate are respectively a first orthogonal projection region, a second orthogonal projection region, and a third orthogonal projection region. The third orthogonal projection region at least overlaps the first orthogonal projection region and at least a portion of the second orthogonal projection region. Furthermore, a magnetic field sensing apparatus is also provided.

Abstract: A signal processor is configured to receive signaling containing information about a sensed sinusoidal waveform of magnetic flux caused by a current flowing in a winding of a motor having a component of distortion caused at least in part by a magnetic flux created by the current flowing, and also about a pure sinusoidal waveform of a sensed fundamental frequency of the magnetic flux; and determine corresponding signaling containing information about anomalies in the motor that depends on a relationship between the sensed sinusoidal waveform and the pure sinusoid waveform, based upon the signaling received. The signaling may be sensed and provided by a motor magnetic flux sensor attached externally to the motor frame.

Abstract: The present disclosure is directed to an electronic circuit having a Hall effect element and a resistor bridge, all disposed over a common semiconductor substrate. The resistor bridge includes a first set of resistive elements having a first vertical epitaxial resistor and a first lateral epitaxial resistor coupled in series, and a second set of resistive elements having a second vertical epitaxial resistor and a second lateral epitaxial resistor coupled in series. The first set of resistive elements and the second set of resistive elements can be coupled in parallel. The resistor bridge can be configured to sense a stress value of the Hall effect element.

Abstract: The present disclosure relates to apparatuses and methods to utilize techniques to simultaneously measure Ramsey pulses on a plurality of axes of the magneto-optical defect center material with defect centers. When measuring simultaneously, there is potentially no relative sensitivity loss relative to scalar measurements. Therefore, Ramsey pulses on a plurality of axes of a magneto-optical defect material with defect centers are measured while bypassing the sensitivity loss incurred with sequential measurement techniques. The axes are interrogated simultaneously while allowing for isolation of the individual responses from the signal detected from the magneto-optical defect center material. In some embodiments, the system utilizes a special Ramsey pulse sequence pair or a ‘shifted magnetometry adapted cancellation’ (SMAC) pair to detect and measure the magnetic field acting on the system.

Abstract: A magnetometer for magnetic detection includes a magneto-optical defect center material having at least one magneto-optical defect center; a radio frequency (RF) exciter system including a radio frequency (RF) excitation source; an optical excitation system including an optical excitation source; an optical detector configured to receive an optical signal based on light emitted by the magneto-optical defect center material due RF excitation and optical excitation provided to the magneto-optical defect center material via the RF excitation source and the optical excitation source, respectively; a magnetic field generator configured to generate a magnetic field detected at the magneto-optical defect center material; and a system controller.

Abstract: Systems for a magneto-optical defect center material magnetic sensor system that uses fluorescence intensity to distinguish the ms=±1 states, and to measure the magnetic field based on the energy difference between the ms=+1 state and the ms=?1 state, as manifested by the RF frequencies corresponding to each state in some embodiments. The system may include an optical excitation source, which directs optical excitation to the material. The system may further include an RF excitation source, which provides RF radiation to the material. Light from the material may be directed through a light pipe to an optical detector. Light from the material may be directed through an optical filter and a lens to be focused at a focal point corresponding to a collection portion of an optical detector.

Abstract: Under one aspect, a method for characterizing current of an operating device under test (DUT) includes injecting a signal into a superconducting sensor; determining a property of the superconducting sensor based on the injected signal; disposing the superconducting sensor in spaced relationship to the operating DUT; inducing a magnetic field in the superconducting sensor based on the spaced relationship, the current of the operating DUT, and the injected signal; determining a change in the property of the superconducting sensor resulting from the induced magnetic field; and estimating current of the operating DUT based on the change in the property of the superconducting sensor.

Abstract: Methods and apparatus for a sensor having non-ratiometric fault trip level setting. In embodiments, a sensor has a sensing element with a fixed gain. A signal processing module receives the fault trip level setting and maintains the fault trip level setting constant during changes in the supply voltage.

Abstract: A system comprises at least one magnetic field sensor having a magnetic sense element formed on a substrate. The sense element senses a magnetic field along a sense axis oriented in a first direction parallel to a surface of the substrate. A shield structure is formed on the substrate. The shield structure has first and second shield portions and the magnetic sense element is disposed between the shield portions. Each of the shield portions includes a body and first and second brim segments extending from opposing ends of the body. The body is aligned parallel to a second direction perpendicular to the first direction and parallel to the surface of the substrate. The brim segments are aligned substantially parallel to the first direction. The shield portions are arranged in mirror symmetry with the brim segments of each of the shield portions extending toward one another.

Abstract: A magnetic field sensor includes a plurality of magnetoresistance elements, each having at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel. Illustrative characteristics selected to provide the respective responses include dimensions and/or construction parameters such as materials, layer thickness and order, and spatial relationship of the magnetoresistance element to the applied magnetic field. A method includes providing each of a plurality of magnetoresistance elements with at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel.

Abstract: Some embodiments are directed to an anisotropic magneto-resistive (AMR) angle sensor die. The die comprises a plurality of AMR angle sensors, each of the plurality of AMR angle sensors comprising a first Wheatstone bridge and a second Wheatstone bridge, wherein an angle position output of the sensor die includes a combination of angle position outputs of each of the plurality of AMR angle sensors.

Abstract: There are provided: an element array 10a including a plurality of tunnel magnetoresistive elements 20 respectively having a fixed magnetic layer 21, a free magnetic layer 22, and an insulation layer 23 provided between the fixed magnetic layer 21 and the free magnetic layer 22, the elements respectively for varying the tunnel resistance of the insulation layer 23 by influence of an external magnetic field; and an electric circuit 30 that applies a voltage to a plurality of the tunnel magnetoresistive elements 20 forming the element array 10a, with the voltage to be applied to each tunnel magnetoresistive element being equal to or higher than 0.1 mV and equal to or lower than 50 mV.

Abstract: An integrated sensor includes a sensor cell, a signal source, an input optical rotator, and a signal detector. The integrated sensor includes a positioner for a signal-processing component. The positioner may be a linear positioner for the signal-processing component, such as a signal source or a signal detector, or may be a rotational positioner for the signal-processing component, such as a polarizer or a polarized signal source. The signal-processing component is located on a signal path of the integrated sensor. A method of adjusting a linear position or rotational position of a signal-processing component is also disclosed. A linear position or a rotational position of the signal-processing component may be adjusted to improve performance of the integrated sensor.

Abstract: A system for magnetic detection is described. The system includes a magneto-optical defect center material including a plurality of magneto-optical defect centers, an RF excitation source, an optical excitation source assembly including an optical excitation source, a system controller, and an optical detector. The system controller is configured to control the RF excitation source to provide RF excitation to the magneto-optical defect center material, and control the optical excitation source to provide optical excitation to the magneto-optical defect center material. The optical detector is configured to receive an optical signal based on light emitted by the magneto-optical defect center material due to the RF excitation and the optical excitation provided to the magneto-optical defect center material.

Abstract: A system for magnetic detection of an external magnetic field is described. The system includes a controller configured to control components of the system. The controller is configured to control an optical excitation source and a RF excitation source to apply pulse sequences to a magneto-optical defect center material such that in the excitation pulses of a first pair of RF excitation pulses have a first phase difference, the excitation pulses of a second pair of RF excitation pulses have a second phase difference, and the second phase difference is different from the first phase difference. The controller computes a combined magnetometry curve as a function of the RF excitation frequency based on a difference between a measured value of a first light detection signal and a measured value of a second light detection signal. The controller sets the first phase difference and the second phase difference based on the combined magnetometry curve.

Abstract: Systems and methods using a magneto-optical defect center material magnetic sensor system that uses fluorescence intensity to distinguish the ms=±1 states, and to measure the magnetic field based on the energy difference between the ms=+1 state and the ms=?1 state, as manifested by the RF frequencies corresponding to each state in some embodiments. The system may include an optical excitation source, which directs optical excitation to the material. The system may further include an RF excitation source, which provides RF radiation to the material. Light from the material may be directed through an optical waveguide assembly comprising an optical waveguide with a hollow core and at least one optical filter coating.

Abstract: Systems for a magneto-optical defect center material magnetic sensor system that uses fluorescence intensity to distinguish the ms=±1 states, and to measure the magnetic field based on the energy difference between the ms=+1 state and the ms=?1 state, as manifested by the RF frequencies corresponding to each state in some embodiments. The system may include an optical excitation source, which directs optical excitation to the material. The system may further include an RF excitation source, which provides RF radiation to the material. Light from the material may be directed through a light pipe to an optical detector. Light from the material may be directed through an optical filter and a lens to be focused at a focal point corresponding to a collection portion of an optical detector.

Abstract: A magnetic resonance coil and a magnetic resonance imaging system using the same are provided. The magnetic resonance coil may include an antenna and a signal processor. The antenna may be configured to receive a radio frequency (RF) signal emitted from an object, wherein the antenna does not resonate with the RF signal. The signal processor may be coupled to the antenna configured to process the RF signal to generate a processed signal.

Abstract: An antenna array includes a plurality of linear electromagnetic resonators having longitudinal axes oriented parallel to one another and not aligned, and at least one decoupling device arranged between two the linear electromagnetic resonators, wherein the decoupling device comprises a plurality of open-loop electromagnetic resonators that are matched to a frequency located in the bandwidth of the two the adjacent linear electromagnetic resonators, that are electrically insulated and that are arranged in a plurality of planes that are not parallel to a plane containing the longitudinal axes of the two the linear electromagnetic resonators. Nuclear magnetic resonance imaging apparatus comprising such an antenna array is also provided.

Abstract: A magnetometer for magnetic detection includes a magneto-optical defect center material including at least one magneto-optical defect center that emits an optical signal when excited by an excitation light, a radio frequency (RF) exciter system configured to provide RF excitation to the magneto-optical defect center material, an optical excitation system configured to direct the excitation light to the magneto-optical defect center material, an optical detector configured to receive the optical signal emitted by the magneto-optical defect center material based on the excitation light and the RF excitation, and a magnetic field generator configured to generate a magnetic field detected at the magneto-optical defect center material, the magnetic field generator including a plurality of permanent magnets arranged in a Halbach array.

Abstract: In one embodiment, an MRI apparatus includes a gradient coil, a receiving circuit, and processing circuitry. The gradient coil is configured to superimpose a gradient magnetic field on a static magnetic field. The receiving circuit is configured to receive an MR (magnetic resonance) signal from an object placed in the gradient magnetic field. The processing circuitry is configured to estimate time variation of an MR (magnetic resonance) frequency during a sampling period of the MR signal based on waveform data of a gradient current applied to the gradient coil, perform correction on a frequency or phase of the MR signal received by the receiving circuit based on the estimated time variation of the MR frequency during the sampling period, and reconstruct an image by using the MR signal subjected to the correction.

Abstract: A state space controller includes an integral part configured to integrate a control deviation, wherein the control deviation indicates a difference between a digital value of a gradient coil current and a reference current; a delay compensator configured to generate a digital control amount according to the integrated control deviation by the integral part, and generated a pulse-width modulation drive signal according to the digital control amount, and includes a subtractor of which a non-inverting input terminal is connected to an output terminal of the integral part, a delayer configured to delay the digital control amount by one calculation cycle, and a first feedback loop configured to delay the digital control amount by one calculation cycle and multiply a first compensation coefficient to obtain a first compensation amount, wherein the first compensation amount is input into a first inverting input terminal of the subtractor.

Abstract: An apparatus to provide power for operating at least one gradient coil of a magnetic resonance imaging system. According to some aspects, the apparatus comprises a plurality of power terminals configured to supply different voltages of a first polarity, and a linear amplifier configured to provide at least one output to power the at least one gradient coil to produce a magnetic field in accordance with a pulse sequence, the linear amplifier configured to be powered by one or more of the plurality of power terminals, wherein the one or more of the plurality of power terminals powering the linear amplifier is selected based, at least in part, on the at least one output.

Abstract: An apparatus to provide power for operating at least one gradient coil of a magnetic resonance imaging system. According to some aspects, the apparatus comprises a plurality of power terminals configured to supply different voltages of a first polarity, and a linear amplifier configured to provide at least one output to power the at least one gradient coil to produce a magnetic field in accordance with a pulse sequence, the linear amplifier configured to be powered by one or more of the plurality of power terminals, wherein the one or more of the plurality of power terminals powering the linear amplifier is selected based, at least in part, on the at least one output.

Abstract: According to some aspects, a portable magnetic resonance imaging system is provided, comprising a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging. The magnetics system comprises a permanent B0 magnet configured to produce a B0 field for the magnetic resonance imaging system, and a plurality of gradient coils configured to, when operated, generate magnetic fields to provide spatial encoding of emitted magnetic resonance signals, a power system comprising one or more power components configured to provide power to the magnetics system to operate the magnetic resonance imaging system to perform image acquisition, and a base that supports the magnetics system and houses the power system, the base comprising at least one conveyance mechanism allowing the portable magnetic resonance imaging system to be transported to different locations.

Abstract: Provided is a magnetic resonance imaging (MRI) apparatus including: a controller configured to determine a first slice and a second slice so that a difference between a slice number of the first slice of an object and a slice number of the second slice of the object is a predetermined interval value; and a radio frequency (RF) coil configured to transmit a preparation pulse signal including a frequency component enabling the first slice to be excited and transmit an RF signal including a plurality of frequency components so that both the first slice and the second slice are excited.

Abstract: In a method and apparatus for capturing magnetic resonance data from an imaging volume of a patient in which liquid, such as particular blood, is moving, a bSSFP magnetic resonance sequence is executed in which nuclear spins located within the imaging volume are cyclically excited by radiation of a radio-frequency pulse, using a magnetic resonance scanner. A ramp pulse is used as the radio-frequency pulse, which establishes a flip angle of the spins that is spatially variable within the imaging volume.

Abstract: A nuclear magnetic measuring device (1) is illustrated with a measuring device (4), wherein the measuring device (4) has a control unit (6), a generator unit (7), an antenna unit (10), a receiving unit (15) and a measuring signal path (16), wherein the measuring signal path (16) comprises an excitation signal path (17) and a reaction signal path (18), and wherein the antenna unit (10) has an antenna signal path. The object of the invention is to provide a nuclear magnetic measuring device (1) that determines at least one unstable property of the measuring signal path (16).

Abstract: A new acoustic tag and process are disclosed for identifying and tracking underwater hosts in up to three dimensions. The acoustic tag has an operation lifetime up to a year or longer at a pulse rate interval of about 15 seconds. The acoustic tag has a signal detection range up to at least about 500 meters that enhances detection probability.

Abstract: Systems and methods for locating one or more radio frequency identification (RFID) tags are provided. A phase difference of received information signals of illuminated RFID tags is utilized to locate the RFID tags. One or more exciters transmit interrogation signals to illuminate the RFID tags in which the exciters may have a plurality of antenna selectively configured to transmit through two or more antennas and to receive on one antenna. Multiple reads of the same RFID tag can also be performed to generate a probability model of the location of the RFID tag. An enhanced particle filter is applied to probability model to determine the exact location of the RFID.

Abstract: A robust WiFi indoor localization system for large public sites includes a self-adaptive system communicatively coupled to a plurality of clients. The self-adaptive system includes a processor, a computer readable medium, and a communication interface module.

Abstract: A method for tracking control of an unmanned aerial vehicle (UAV) includes obtaining flight data of the UAV, determining, within a preset period of time and according to the flight data, a number of switching times of the UAV switching between different flight directions, determining whether the UAV is vibrating according to the number of switching times, and determining whether to continue tracking a target according to whether the UAV is vibrating.

Abstract: Disclosed is a coating layer penetrable by radio wave and having a metallic luster. The coating layer includes a resin layer as an outmost layer to an exterior or front, a metallic texture layer formed on a rear side of the resin layer and comprising a optical film layer including metal oxides having different refractive indexes, and a germanium (Ge) layer to reflect light and a reflection layer formed on the rear side of the metallic texture layer.

Abstract: The invention relates to a method for calibrating an active sensor system which comprises at least one active sensor A and one active sensor B. The term “active” indicates that the sensors A and B actively emit signals. The sensor A has a transmitter TXA for emitting a signal STXA and a receiver RXA for receiving a signal S RXA, wherein the receiver RX A and the transmitter TXA operate independently of one another to the greatest possible extent in a radar mode of the sensor A. The sensor B has a transmitter TXB, a receiver RXB, and a unit D, which is used to connect the transmitter TXB to the receiver RXB in a transponder mode of the sensor B, with the result that a signal SRXB received by the receiver RXB is emitted again by the transmitter TXB as a signal STXB. A gain Gcon,B between the received signal SRXB and the signal STXB which is emitted again is predefined in this case.

Abstract: A system and method for reducing the effects of multipath propagation (MPP) arising from the operation of a time-of-flight (ToF) sensor are described. The ToF sensor can include light sources that emit modulated light in a monitoring area, which may be partitioned into a number of segments. The light sources may correspond to the segments. Tracking data of an object in the area can be analyzed to determine which segments are occupied by the object. The light sources corresponding to segments occupied by the object can be activated, and the light sources corresponding to segments unoccupied by the object can be deactivated. Modulated light may be emitted from only the activated light sources. Reflections of the modulated light from the object can be received and based on the received reflections, a depth distance of the object with respect to the ToF sensor can be provided.

Abstract: An optical transmitting system for distance measuring includes a signal generator, a laser diode coupled to the signal generator, and an optics device. The signal generator is configured to generate a first plurality of electrical signals. The laser diode is configured to generate a first plurality of optical waveforms that correspond with the first plurality of electrical signals. The optics device is configured to receive the first plurality of optical waveforms and direct the first plurality of optical waveforms toward a first plurality of scan points that form a scan region within a field of view (FOV). A first signal type, a first signal duration, a first signal amplitude, or a first signal repetition frequency of the first plurality of optical waveforms is based on a first desired range of the first plurality of scan points.

Abstract: Described are LiDAR systems comprising a transmission optical system and a collection optical system utilizing a common lens or pieces derived from the same lens to reduce or eliminate image mismatch between the transmission optical system and the collection optical system.

Abstract: Described are LiDAR systems including an apparatus configured to translate one or more spherical lenses, an array of light sources, an array of photodetectors, or any combination thereof of a collection optical system in the Z direction (optical axis) to move the image plane of the collection optical system and match the image size between a transmission optical system and the collection optical system.

Abstract: A chip-scale lidar system includes a first light source to output a first signal, and a second light source to output a second signal. A transmit beam coupler provides an output signal for transmission that includes a portion of the first signal and a portion of the second signal, and receive beam coupler obtains a received signal resulting from reflection of the output signal by a target. The system includes a first and second set of photodetectors to obtain a first and second set of electrical currents from a first and second set of combined signals including a first and second portion of the received signal. A processor obtains Doppler information about the target from the second set of electrical currents and obtains range information about the target from the first set of electrical currents and the second set of electrical currents.