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    SENSOR READOUT WITH TIMESTAMP CALIBRATION
    111.
    发明申请
    SENSOR READOUT WITH TIMESTAMP CALIBRATION 有权

    公开(公告)号：US20210227167A1

    公开(公告)日：2021-07-22

    申请号：US16748338

    申请日：2020-01-21

    Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

    Inventor： Robert Daniel McGrath ,  Dimitre P. Dimitrov

    IPC: H04N5/376 ,  H04N5/378

    Abstract: Devices and methods of minimizing the temporal error between pixels or groups of pixels on a focal plane array involving, on a focal plane array comprising at least two pixels or groups of pixels, at least one counter or ramp, and at least one trigger: determining the timing error associated with a time stamp associated with the at least two pixels or groups of pixels; storing the timing error associated with the at least two pixels or groups of pixels and the pixel or pixel group location; and using the stored timing error and pixel or pixel group location to correct subsequent time stamps associated with the at least two pixels or groups of pixels, wherein the timing error corresponds to a systematic error between the trigger and the counter or ramp value due to the location of a pixel or group of pixels on the focal plane array.

    Sensor readout with timestamp calibration
    112.
    发明授权
    Sensor readout with timestamp calibration 有权

    公开(公告)号：US11050964B1

    公开(公告)日：2021-06-29

    申请号：US16748338

    申请日：2020-01-21

    Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

    Inventor： Robert Daniel McGrath ,  Dimitre P. Dimitrov

    IPC: H04N5/376 ,  H04N5/378

    Abstract: Devices and methods of minimizing the temporal error between pixels or groups of pixels on a focal plane array involving, on a focal plane array comprising at least two pixels or groups of pixels, at least one counter or ramp, and at least one trigger: determining the timing error associated with a time stamp associated with the at least two pixels or groups of pixels; storing the timing error associated with the at least two pixels or groups of pixels and the pixel or pixel group location; and using the stored timing error and pixel or pixel group location to correct subsequent time stamps associated with the at least two pixels or groups of pixels, wherein the timing error corresponds to a systematic error between the trigger and the counter or ramp value due to the location of a pixel or group of pixels on the focal plane array.

    SITUATIONAL AWARENESS GROUND TRANSMITTER
    114.
    发明申请
    SITUATIONAL AWARENESS GROUND TRANSMITTER 有权

    公开(公告)号：US20210174689A1

    公开(公告)日：2021-06-10

    申请号：US16703121

    申请日：2019-12-04

    Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

    Inventor： Peter Ladubec, JR.

    IPC: G08G5/00 ,  G08G5/02

    Abstract: Techniques are disclosed that are designed to transmit low power radio frequency (RF) signals that include location parameters of one or more ground-based objects. Example systems include at least one or more processors and RF circuitry. The one or more processors are configured to generate one or more digital signals having a given number of bits. In one of the digital signals, a first portion of the bits includes location information for a ground-based object, a second portion of the bits includes heading information associated with the ground-based object, and a third portion of the bits includes speed information associated with the ground-based object. A second digital signal can include the size of the ground-based object. The RF circuitry converts the one or more digital signals into RF signals and transmits the RF signals at a given periodic pulse rate.

    Phase detector for phase-locked loops
    116.
    发明授权
    Phase detector for phase-locked loops 有权

    公开(公告)号：US11005482B1

    公开(公告)日：2021-05-11

    申请号：US16740103

    申请日：2020-01-10

    Applicant: BAE Systems Information and Electronic Systems Integration Inc.

    Inventor： Mark E. Stuenkel ,  Mark D. Hickle

    IPC: H03D3/24 ,  H03L7/087 ,  H03L7/099 ,  H03L7/089

    Abstract: Techniques are disclosed for phase detection in a phase-locked loop (PLL) control system, such as a millimeter-wave PLL. A PLL control system includes a voltage-controlled oscillator (VCO) circuit and a sub-sampling phase detector (SSPD). The VCO circuit is configured to generate an oscillating VCO output voltage based at least in part on an error signal generated by the SSPD. The error signal is proportional to a phase difference between an oscillating reference input voltage and the oscillating VCO output voltage. The SSPD includes a switched emitter-follower (SEF) sampling network, also referred to in this disclosure as an SEF circuit. In contrast to existing CMOS-based techniques, the SEF sampling network allows the SSPD to operate up to higher frequencies, for example, greater than 100 GHz, than possible using a CMOS sampler, and is also compatible with BiCMOS processes, which generally do not have access to advanced small-geometry CMOS.

    Refractive laser communication beam director with dispersion compensation
    117.
    发明授权
    Refractive laser communication beam director with dispersion compensation 有权

    公开(公告)号：US11002956B1

    公开(公告)日：2021-05-11

    申请号：US16952589

    申请日：2020-11-19

    Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

    Inventor： Robert T. Carlson

    IPC: G02B26/08 ,  G02B27/00 ,  H04B10/572 ,  H04B10/50 ,  G02B7/18

    Abstract: A co-boresight refractive beam director for a full duplex laser communication terminal includes a chromatic beam steering element, such as a two or three prism Risley prism assembly, and a dispersion compensation mechanism (DCM) inserted in either the transmit or receive path. The DCM adjusts a beam direction of either the transmit or receive laser beam to compensate for a pointing difference introduced by the beam steering element due to a difference between the transmit and receive wavelengths. The DCM can include a tip/tilt mirror and actuator, which can be a commercially available FSM assembly. The beam steering element can be temperature stabilized. Position feedback sensors can increase DCM speed and accuracy. The pointing difference can be calculated and/or interpolated from a pre-established look-up table or fitted curve relating pointing differences to transmit and receive frequencies and the pointing direction of the beam steering element.

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