Patents by Inventor Ronald Kapusta

Ronald Kapusta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210376566
    Abstract: This disclosure is directed to, among other things, techniques to quickly replenish a capacitance of a laser diode driver circuit after an optical pulse, which can enable a burst of pulses (more than one pulse), such as to enable pulse coding. An energy reservoir circuit can be coupled to a laser diode driver circuit and to a power supply circuit and configured to store enough energy to fire the RD laser diode driver more than once. The energy reservoir circuit can act as an intermediate interface between the RD laser diode driver and the power supply circuit to better optimize the current requirements of each block.
    Type: Application
    Filed: June 2, 2020
    Publication date: December 2, 2021
    Inventors: Shawn S. Kuo, James Lin, Ronald A. Kapusta
  • Patent number: 11075502
    Abstract: Techniques to achieve higher power/shorter pulses with a laser diode. By initially applying a static reverse bias across the laser diode, the laser diode can turn on at a larger inductor current. When the laser diode is initially reverse biased, depletion charge and diffusion charge can be populated before the laser diode will lase. This causes the laser diode to initially turn on at a larger inductor current, which will reduce the rise time, thereby achieving higher power/shorter pulses.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: July 27, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Shawn S. Kuo, Ronald A. Kapusta, Xu Tang, Leonard Shtargot, Eugene L. Cheung, Jonathan Paolucci
  • Patent number: 11041722
    Abstract: Systems and methods for sensing angular motion using a microelectromechanical system (MEMS) gyroscope are described. These systems and methods may be useful for sensing angular motion in the presence of low-frequency noise, which may be noise below 1 KHz. In a system for sensing angular motion, low-frequency noise may give rise to duty cycle jitter, which may affect the demodulation of the sense signal and cause errors in angular motion estimates. The systems and methods described herein address this problem by relying on double-edge phase detection technique that involves sensing when the rising and falling edges of the resonator signal deviate from their expected values in the idealized 50% duty cycle scenario. To prevent the formation of ripples in the double-edge phase detection that may otherwise affect the demodulation of the sense signal, a switch may be used. The switch may be maintained in a non-conductive state when a ripple is received.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: June 22, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Jiefeng Yan, William A. Clark, Ronald A. Kapusta, Jr.
  • Publication number: 20210156973
    Abstract: Techniques for using multiple detection paths in a light detection and ranging (LIDAR) receiver circuit. In general, the receiver circuit can perform more than one flow of filtering, detection, and estimation on the same return signal. One advantage of using multiple detection paths is the ability to extract different aspects of the return signal.
    Type: Application
    Filed: November 27, 2019
    Publication date: May 27, 2021
    Inventors: Ronald A. Kapusta, Miles R. Bennett, Lijun Gao
  • Publication number: 20210072358
    Abstract: In an optical detection system, features of interest can be identified from ADC circuitry data prior to inter-circuit communication with downstream object or target processing circuitry. In this manner, a volume of data being transferred to such downstream processing circuitry can be reduced as compared to other approaches, simplifying the receive signal processing chain and providing power savings.
    Type: Application
    Filed: September 10, 2019
    Publication date: March 11, 2021
    Inventors: Ronald A. Kapusta, Brian D. Hamilton
  • Publication number: 20210066885
    Abstract: Techniques to achieve higher power/shorter pulses with a laser diode. By initially applying a static reverse bias across the laser diode, the laser diode can turn on at a larger inductor current. When the laser diode is initially reverse biased, depletion charge and diffusion charge can be populated before the laser diode will lase. This causes the laser diode to initially turn on at a larger inductor current, which will reduce the rise time, thereby achieving higher power/shorter pulses.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 4, 2021
    Inventors: Shawn S. Kuo, Ronald A. Kapusta, Xu Tang, Leonard Shtargot, Eugene L. Cheung, Jonathan Paolucci
  • Patent number: 10852136
    Abstract: A method for detecting frequency mismatch in microelectromechanical systems (MEMS) gyroscopes is described. Detection of the frequency mismatch between a drive signal and a sense signal may be performed by generating an output signal whose spectrum reflects the physical characteristics of the gyroscope, and using the output signal to determine the frequency fC of the sense signal. The output signal may be generated by cross-correlating a random or pseudo-random noise signal with a response signal, where the response signal can be obtained by allowing the noise signal to pass through a system designed to have a noise transfer function that mimics the frequency response of the gyroscope. Since the noise signal is random or pseudo-random, cross-correlating the noise signal with the response signal reveals spectral characteristics of the gyroscope. To improve computational efficiency, the cross-correlation can be performed on demodulated versions of the noise signal and the response signal.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: December 1, 2020
    Assignee: Analog Devices, Inc.
    Inventors: Jiefeng Yan, Ronald A. Kapusta, Jr., Jianrong Chen
  • Publication number: 20200271841
    Abstract: The present disclosure provides numerous applications for the use of liquid crystal polarization gratings (LCPGs) to controllably steer light. When combined with an image sensor, light generated or reflected from different fields of view (FOV) can be steered, allowing an increase in the FOV or the resolution of the image. Further, the LCPG can stabilize the resulting image, counteracting any movement of the image sensor. The combination of LCPGs and liquid crystal waveguides (LCWGs) allows fine deflection control of light (from the LCWG) over a wild field of view (from the LCPG). Further applications of LCPGs include object tracking and the production of depth images using multiple imaging units and independently steered LCPGs. The LCPG may be used in controlling both the projection and reception of light.
    Type: Application
    Filed: February 17, 2020
    Publication date: August 27, 2020
    Inventors: Eoin E. English, Andrew William Sparks, Scott Robert Davis, Tyler Adam Dunn, Maurizio Zecchini, Michael Ziemkiewicz, Ronald A. Kapusta, Javier Calpe Maravilla, Paul O'Sullivan, Jonathan Ephraim David Hurwitz, Erik D. Barnes, Monica Redon Segrera, krystian Balicki
  • Publication number: 20200256955
    Abstract: Techniques are described to adjust one or more parameters to vary the illumination output within at least one of the regions-of-interest (ROIs) in a field-of-view (FOV) and to adjust one or more corresponding receiver parameter(s). By associating different parameters between two or more ROIs within an FOV, this disclosure describes a LIDAR system having an adaptive FOV. An adaptive FOV can allow a LIDAR system to vary its performance between ROIs. For example, in an FOV having at least a first ROI and a second ROI, the LIDAR system can output more optical power in the first ROI then the second ROI to increase the signal-to-noise (SNR) ratio and therefore achieve a longer detection range.
    Type: Application
    Filed: February 7, 2019
    Publication date: August 13, 2020
    Inventors: Ronald A. Kapusta, Miles R. Bennett
  • Publication number: 20200256954
    Abstract: Techniques are described to encode a single light pulse with information that can provide the benefits of a single long pulse and a short, coded pulse train. For example, techniques are described to generate a light pulse for transmission that has an optical intensity profile that includes a waveform having one or more relatively narrower pulses superimposed upon a relatively wider pulse. Thus, a hybrid pulse can be generated that includes both a wide pulse and a narrow pulse train portion, for example, superimposed thereon.
    Type: Application
    Filed: February 7, 2019
    Publication date: August 13, 2020
    Inventors: Ronald A. Kapusta, Shawn S. Kuo, Miles R. Bennett
  • Publication number: 20200150228
    Abstract: A system and method for providing a dynamic region of interest in a lidar system can include scanning a light beam over a field of view to capture a first lidar image, identifying a first object within the captured first lidar image, selecting a first region of interest within the field of view that contains at least a portion of the identified first object, and capturing a second lidar image, where capturing the second lidar image includes scanning the light beam over the first region of interest at a first spatial sampling resolution, and scanning the light beam over the field of view outside of the first region of interest at a second spatial sampling resolution, wherein the second sampling resolution is different the first spatial sampling resolution.
    Type: Application
    Filed: December 8, 2017
    Publication date: May 14, 2020
    Inventors: Ronald A. Kapusta, Andrew William Sparks, Harvey Weinberg
  • Patent number: 10578435
    Abstract: Circuits and methods for compensating microelectromechanical system (MEMS) gyroscopes for quality factor variations are described. Quality factor variations arise when mechanical losses are introduced in the gyroscope's resonator, for example due to thermoelastic damping or squeeze-film damping, which may hinder the gyroscope's ability to accurately sense angular velocity. Quality factor compensation may be performed by generating a compensation signal having a time decay rate that depends on the quality factor of resonator. In this way, artifacts that may otherwise arise in gyroscope's output are limited. Additionally, or alternatively, quality factor compensation may be performed by controlling the force with which the gyroscope's resonator is driven. This may be achieved, for example, by controlling the average value of the drive signal.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: March 3, 2020
    Assignee: Analog Devices, Inc.
    Inventors: James Lin, Ronald A. Kapusta, Jr., Lijun Gao
  • Publication number: 20200041651
    Abstract: A shape of a transmitted LIDAR pulse can be measured contemporaneously with operation of the LIDAR system, such as to account for variations in the shape of the LIDAR pulse, such as due to changes in environmental or operation conditions. The measured shape can then be used to determine an arrival time of LIDAR pulses received from a target region with improved accuracy.
    Type: Application
    Filed: July 31, 2018
    Publication date: February 6, 2020
    Inventors: Ronald A. Kapusta, Jianrong Chen
  • Publication number: 20200025566
    Abstract: Systems and methods for sensing angular motion using a microelectromechanical system (MEMS) gyroscope are described. These systems and methods may be useful for sensing angular motion in the presence of low-frequency noise, which may be noise below 1 KHz. In a system for sensing angular motion, low-frequency noise may give rise to duty cycle jitter, which may affect the demodulation of the sense signal and cause errors in angular motion estimates. The systems and methods described herein address this problem by relying on double-edge phase detection technique that involves sensing when the rising and falling edges of the resonator signal deviate from their expected values in the idealized 50% duty cycle scenario. To prevent the formation of ripples in the double-edge phase detection that may otherwise affect the demodulation of the sense signal, a switch may be used. The switch may be maintained in a non-conductive state when a ripple is received.
    Type: Application
    Filed: July 23, 2018
    Publication date: January 23, 2020
    Applicant: Analog Devices, Inc.
    Inventors: Jiefeng Yan, William A. Clark, Ronald A. Kapusta, JR.
  • Publication number: 20190219394
    Abstract: Circuits and methods for compensating microelectromechanical system (MEMS) gyroscopes for quality factor variations are described. Quality factor variations arise when mechanical losses are introduced in the gyroscope's resonator, for example due to thermoelastic damping or squeeze-film damping, which may hinder the gyroscope's ability to accurately sense angular velocity. Quality factor compensation may be performed by generating a compensation signal having a time decay rate that depends on the quality factor of resonator. In this way, artifacts that may otherwise arise in gyroscope's output are limited. Additionally, or alternatively, quality factor compensation may be performed by controlling the force with which the gyroscope's resonator is driven. This may be achieved, for example, by controlling the average value of the drive signal.
    Type: Application
    Filed: January 12, 2018
    Publication date: July 18, 2019
    Applicant: Analog Devices, Inc.
    Inventors: James Lin, Ronald A. Kapusta, JR., Lijun Gao
  • Patent number: 10309782
    Abstract: Various embodiments provide methods of determining the quality factor of a resonating body in ways that are advantageous over previously known methods. For example, embodiments allow the determination of the quality factors of a resonating body without preventing the simultaneous use of the resonating body. For micromachined (“MEMS”) devices, embodiments allow the determination of the quality factors of a resonating body in a manner that is not dependent on transduction parameters of the MEMS device.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: June 4, 2019
    Assignee: Analog Devices, Inc.
    Inventors: Ronald A. Kapusta, Jiefeng Yan, James Lin
  • Patent number: 10247600
    Abstract: Systems and techniques are described for matching the resonance frequencies of multiple resonators. In some embodiments, a resonator generates an output signal reflecting the resonator's response to an input drive signal and an input noise signal. The output signal is then compared to the noise signal to derive a signal representative of the resonance frequency of the resonator. Comparing that signal to the output signal of a second resonator gives an indication of whether there is a difference between the resonance frequencies of the two resonators. If there is, one or both of the resonators may be adjusted. In this manner, the resonance frequencies of resonators may be matched during normal operation of the resonators.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: April 2, 2019
    Assignee: Analog Devices, Inc.
    Inventors: Youn-Jae Kook, Jose Barreiro Silva, Jianrong Chen, Ronald A. Kapusta, Jr.
  • Publication number: 20190063923
    Abstract: A method for detecting frequency mismatch in microelectromechanical systems (MEMS) gyroscopes is described. Detection of the frequency mismatch between a drive signal and a sense signal may be performed by generating an output signal whose spectrum reflects the physical characteristics of the gyroscope, and using the output signal to determine the frequency fC of the sense signal. The output signal may be generated by cross-correlating a random or pseudo-random noise signal with a response signal, where the response signal can be obtained by allowing the noise signal to pass through a system designed to have a noise transfer function that mimics the frequency response of the gyroscope. Since the noise signal is random or pseudo-random, cross-correlating the noise signal with the response signal reveals spectral characteristics of the gyroscope. To improve computational efficiency, the cross-correlation can be performed on demodulated versions of the noise signal and the response signal.
    Type: Application
    Filed: August 30, 2017
    Publication date: February 28, 2019
    Applicant: Analog Devices, Inc.
    Inventors: Jiefeng Yan, Ronald A. Kapusta, JR., Jianrong Chen
  • Publication number: 20180306905
    Abstract: A system and method for providing a dynamic region of interest in a lidar system can include scanning a light beam over a field of view to capture a first lidar image, identifying a first object within the captured first lidar image, selecting a first region of interest within the field of view that contains at least a portion of the identified first object, and capturing a second lidar image, where capturing the second lidar image includes scanning the light beam over the first region of interest at a first spatial sampling resolution, and scanning the light beam over the field of view outside of the first region of interest at a second spatial sampling resolution, wherein the second sampling resolution is less than the first spatial sampling resolution.
    Type: Application
    Filed: April 20, 2017
    Publication date: October 25, 2018
    Inventors: Ronald A. Kapusta, Benjamin Luey, Harvy Weinberg, Scott R. Davis, Michael H. Anderson, Scott D. Rommel
  • Publication number: 20180128674
    Abstract: Systems and techniques are described for matching the resonance frequencies of multiple resonators. In some embodiments, a resonator generates an output signal reflecting the resonator's response to an input drive signal and an input noise signal. The output signal is then compared to the noise signal to derive a signal representative of the resonance frequency of the resonator. Comparing that signal to the output signal of a second resonator gives an indication of whether there is a difference between the resonance frequencies of the two resonators. If there is, one or both of the resonators may be adjusted. In this manner, the resonance frequencies of resonators may be matched during normal operation of the resonators.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 10, 2018
    Applicant: Analog Devices, Inc.
    Inventors: Youn-Jae Kook, Jose Barreiro Silva, Jianrong Chen, Ronald A. Kapusta, JR.