Patents by Inventor Charles R. Ruelke

Charles R. Ruelke 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).

  • Patent number: 10573360
    Abstract: A method and apparatus for adaptable phase training of high frequency clock signaling for data capture is provided. A state machine synchronizes a first selection signal to a delay multiplexer and a second selection signal to a digital block demultiplexer to sequentially select a targeted pair of the static storage elements for each of a plurality of phase-delayed data strobe clock signals. Read back data from an external memory captured by the static storage elements is compared to known valid data. The state machine determines which of the plurality of phase-delayed data strobe clock signals resulted in known valid data being captured by the static storage elements based on the comparison. The state machine selects one of the plurality of phase-delayed data strobe clock signals that resulted in valid data being captured as a read clock signal for a memory controller to capture subsequent read data from the external memory.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 25, 2020
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Johnny R. Ferreira, Charles R. Ruelke
  • Patent number: 10491235
    Abstract: Disclosed herein are multi-mode methods and devices for sample generation. An exemplary device for generating an output sample includes an analog-to-digital converter (ADC) for sampling a plurality of input analog signals and producing an ADC output sample. The ADC may include a ADC digital modulator including timing-critical components. A plurality of digital blocks may be coupled to the ADC digital modulator. The exemplary device may include a baseband processor for controlling a plurality of clock inputs. The plurality of clock inputs may drive the ADC digital modulator and the plurality of digital blocks. The baseband processor may be configured to operate in a plurality of modes including a first mode and a second mode. The first mode may include a first mode standby state and a first mode initial operating state. The second mode may include a second mode initial operating state and a second mode standby state.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: November 26, 2019
    Assignee: Motorola Solutions, Inc.
    Inventors: Charles R. Ruelke, Clarence Coffee
  • Patent number: 10263636
    Abstract: A scalable dynamic range analog-to-digital converter. In one instance, a method of scaling a dynamic range of an analog-to-digital converter is provided. The method includes operating the analog-to-digital converter at a first dynamic range. The method also includes receiving a radio frequency signal and detecting an on-channel signal level of the radio frequency signal. The method also includes when the on-channel signal level is above an on-channel threshold, operating the analog-to-digital converter at a second dynamic range. The method also includes when the on-channel signal level is below the on-channel threshold, operating the analog-to-digital converter at the first dynamic range.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: April 16, 2019
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Charles R. Ruelke, Joshua E. Dorevitch, Nir Corse
  • Publication number: 20180358980
    Abstract: A scalable dynamic range analog-to-digital converter. In one instance, a method of scaling a dynamic range of an analog-to-digital converter is provided. The method includes operating the analog-to-digital converter at a first dynamic range. The method also includes receiving a radio frequency signal and detecting an on-channel signal level of the radio frequency signal. The method also includes when the on-channel signal level is above an on-channel threshold, operating the analog-to-digital converter at a second dynamic range. The method also includes when the on-channel signal level is below the on-channel threshold, operating the analog-to-digital converter at the first dynamic range.
    Type: Application
    Filed: June 7, 2017
    Publication date: December 13, 2018
    Inventors: Charles R. Ruelke, Joshua E. Dorevitch, Nir Corse
  • Patent number: 9735759
    Abstract: A method and apparatus for mitigating electromagnetic noise in an electronic device. The method includes generating a trigger clock signal at a first frequency, and generating a second clock signal at a second frequency. The second frequency is higher than the first frequency. The method also includes receiving an input signal with a converter circuit, detecting an event based on the trigger clock signal, and predicting a time for a conversion of the input signal based on the detected event. The method further includes blanking the second clock signal for a predetermined period based on the predicted time for a conversion.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: August 15, 2017
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Edward A. Diaz, Johnny R. Ferreira, Ricardo Franco, Charles R. Ruelke, Richard S. Young
  • Patent number: 9578469
    Abstract: A method and system for direct mode operation (DMO) of a talkgroup enables device to device (D2D) DMO operation leveraged from a Land Mobile Radio (LMR) system. The method includes scanning at a radio receiver a defined radio frequency spectrum; receiving at the radio receiver in the defined radio frequency spectrum a wake-up signal; identifying a talkgroup identifier in the wake-up signal, wherein the talkgroup identifier corresponds to a talkgroup being monitored by the radio receiver; in response to identifying the talkgroup identifier, decoding code sequences included in the wake-up signal; identifying in at least one of the code sequences both a center frequency and a transmission bandwidth of the DMO transmission; and tuning the radio receiver to receive the DMO transmission at the center frequency and transmission bandwidth.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: February 21, 2017
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Charles R. Ruelke, Robert J. Corke, Bob Logalbo
  • Patent number: 9514066
    Abstract: A real-time reconfigurable input/output interface of a controller and a method of reconfiguring the same. The reconfigurable interface enables the controller to communicate with a plurality of peripheral digital subsystem blocks, and includes an input/output interface, a profile memory, and a state machine. The input/output interface includes a plurality of data lines including a shared portion that are shared among the plurality of peripheral digital subsystem blocks. The profile memory stores a plurality of interface profiles, each interface profile defining a configuration of the input/output interface to communicate with an associated one of the peripheral blocks. The state machine is coupled to the profile memory to receive interface profiles and to the input/output interface. In response to each request to communicate with a particular peripheral block, the state machine configures the input/output interface according to the interface profile associated with the particular peripheral block.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: December 6, 2016
    Assignee: Motorola Solutions, Inc.
    Inventors: Edward A. Diaz, Johnny R. Ferreira, Ricardo Franco, Charles R. Ruelke, Matthew E. Simms
  • Publication number: 20160315795
    Abstract: A method of expanding a capacity of a single radio channel, and a radio. The method includes receiving a primary signal and a secondary signal. The method also includes a transmitter modulating the primary signal and the secondary signal. The method further includes the transmitter scaling a power of the secondary signal below a power of the primary signal to create a power differential. The method also includes the transmitter offsetting a carrier frequency of the secondary signal from a carrier frequency of the primary signal to create a carrier frequency offset. The method further includes the transmitter combining the primary signal and the secondary signal to generate a composite signal. The method also includes the transmitter transmitting the composite signal within the single radio channel via an antenna. The antenna is coupled to the transmitter.
    Type: Application
    Filed: April 25, 2015
    Publication date: October 27, 2016
    Inventors: Yadunandana N. Rao, RaviTeja Chinta, Charles R. Ruelke, Darrell J. Stogner
  • Patent number: 9467319
    Abstract: A method of expanding a capacity of a single radio channel, and a radio. The method includes receiving a primary signal and a secondary signal. The method also includes a transmitter modulating the primary signal and the secondary signal. The method further includes the transmitter scaling a power of the secondary signal below a power of the primary signal to create a power differential. The method also includes the transmitter offsetting a carrier frequency of the secondary signal from a carrier frequency of the primary signal to create a carrier frequency offset. The method further includes the transmitter combining the primary signal and the secondary signal to generate a composite signal. The method also includes the transmitter transmitting the composite signal within the single radio channel via an antenna. The antenna is coupled to the transmitter.
    Type: Grant
    Filed: April 25, 2015
    Date of Patent: October 11, 2016
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Yadunandana N. Rao, RaviTeja Chinta, Charles R. Ruelke, Darrell J. Stogner
  • Publication number: 20160100294
    Abstract: A method and system for direct mode operation (DMO) of a talkgroup enables device to device (D2D) DMO operation leveraged from a Land Mobile Radio (LMR) system. The method includes scanning at a radio receiver a defined radio frequency spectrum; receiving at the radio receiver in the defined radio frequency spectrum a wake-up signal; identifying a talkgroup identifier in the wake-up signal, wherein the talkgroup identifier corresponds to a talkgroup being monitored by the radio receiver; in response to identifying the talkgroup identifier, decoding code sequences included in the wake-up signal; identifying in at least one of the code sequences both a center frequency and a transmission bandwidth of the DMO transmission; and tuning the radio receiver to receive the DMO transmission at the center frequency and transmission bandwidth.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 7, 2016
    Inventors: CHARLES R. RUELKE, ROBERT J. CORKE, BOB LOGALBO
  • Patent number: 9042856
    Abstract: A method and apparatus for using erasure to improve signal decoding when data is impacted by an interference event. Embodiments may include receiving in an RF receiver a desired on-channel signal that includes an information signal modulated on to the desired on-channel signal; generating a sampled received signal with an analog-to-digital (A/D) converter; detecting an interference event using an interference detector as well as generating a mask based on the interference event; processing the sampled received signal using the mask to generate decoding data for use by a soft decoder; and, providing the decoding data to the soft decoder.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: May 26, 2015
    Assignee: Motorola Solutions, Inc.
    Inventors: Kevin G Doberstein, Yadunandana N Rao, Charles R Ruelke
  • Patent number: 9036741
    Abstract: A wideband phase detector configured to receive an intermediate frequency (IF) signal having a plurality of information signals at predetermined carrier frequencies and to generate a carrier indication signal used to control one or more attenuators to equalize the signal levels of the information signals thereby enabling a multichannel receiver to process the two information signals in a parallel fashion using a common analog front-end and analog to digital conversion circuit. The circuit may include an attenuation controller configured to provide control signals to the one or more attenuators to attenuate one or more corresponding information signals based on an average of the carrier indication signal.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: May 19, 2015
    Assignee: Motorola Solutions, Inc.
    Inventors: Charles R. Ruelke, Yadybabdaba N. Rao, Geetha K. Thampi
  • Patent number: 9001932
    Abstract: A method and apparatus for a receiver system in a receiver that includes at least two front end branches, each branch having its own intermediate frequency (IF) mixer to shift a received signal to an IF. When receiving multiple independent signals, the signals are digitized and the receiver performs a digital complex transform on each signal to obtain the corresponding quadrature component. When receiving a single signal the signal is routed to two mixers that are 90 degrees out of phase to obtain the quadrature signal components in the analog section of the receiver.
    Type: Grant
    Filed: December 29, 2012
    Date of Patent: April 7, 2015
    Assignee: Motorola Solutions, Inc.
    Inventors: Charles R. Ruelke, Yadunandana M. Rao
  • Patent number: 8971456
    Abstract: A receiver for a wireless communication device provides a dual path receiver receiving first and second protocol-agnostic, uncorrelated receive signals simultaneously. The dual path receiver generating first and second offset IF signals from the simultaneously received first and second protocol-agnostic, uncorrelated receive signals. The receiver utilizes at least one converter for converting the first and second offset IF signals into at least one serial synchronous interface (SSI) signal representing the spectrum at IF. At least one processor receives the at least one SSI signal and applies parallel processing paths to demodulate the at least one SSI signal into separate baseband signals. The processor provides interference detection of, and level control for, the first and second offset IF signals.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: March 3, 2015
    Assignee: Motorola Solutions, Inc.
    Inventors: Ariel L. Galan, Young-Seo Park, Charles H. Carter, Charles R. Ruelke, Darrell Stogner
  • Publication number: 20150017941
    Abstract: A method and apparatus for using erasure to improve signal decoding when data is impacted by an interference event. Embodiments may include receiving in an RF receiver a desired on-channel signal that includes an information signal modulated on to the desired on-channel signal; generating a sampled received signal with an analog-to-digital (A/D) converter; detecting an interference event using an interference detector as well as generating a mask based on the interference event; processing the sampled received signal using the mask to generate decoding data for use by a soft decoder; and, providing the decoding data to the soft decoder.
    Type: Application
    Filed: July 10, 2013
    Publication date: January 15, 2015
    Inventors: Kevin G. Doberstein, Yadunandana N. Rao, Charles R. Ruelke
  • Publication number: 20140185711
    Abstract: A wideband phase detector configured to receive an intermediate frequency (IF) signal having a plurality of information signals at predetermined carrier frequencies and to generate a carrier indication signal used to control one or more attenuators to equalize the signal levels of the information signals thereby enabling a multichannel receiver to process the two information signals in a parallel fashion using a common analog front-end and analog to digital conversion circuit. The circuit may include an attenuation controller configured to provide control signals to the one or more attenuators to attenuate one or more corresponding information signals based on an average of the carrier indication signal.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 3, 2014
    Applicant: MOTOROLA SOLUTIONS, INC.
    Inventors: CHARLES R. RUELKE, YADYBABDABA N. RAO, GEETHA K. THAMPI
  • Publication number: 20140185718
    Abstract: A method and apparatus for a receiver system in a receiver that includes at least two front end branches, each branch having its own intermediate frequency (IF) mixer to shift a received signal to an IF. When receiving multiple independent signals, the signals are digitized and the receiver performs a digital complex transform on each signal to obtain the corresponding quadrature component. When receiving a single signal the signal is routed to two mixers that are 90 degrees out of phase to obtain the quadrature signal components in the analog section of the receiver.
    Type: Application
    Filed: December 29, 2012
    Publication date: July 3, 2014
    Applicant: MOTOROLA SOLUTIONS, INC.
    Inventors: CHARLES R. RUELKE, YADUNANDANA M. RAO
  • Patent number: 8565145
    Abstract: A method for transmitting a communication generated by an originating device to a target device using a repeating device is provided. In the method the communication is transmitted from the originating device and received at the repeating device. A repeater request sequence is transmitted from the originating device and retransmitted from the first repeating device to the target device before the repeater request sequence is received at the first repeating device.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: October 22, 2013
    Assignee: Motorola Solutions, Inc.
    Inventors: Shakeeb Z. Khan, Joseph J. Medvid, III, Charles R. Ruelke, Richard S. Young, Branko L. Avanic, Lorenzo Cruger, Tan V. Dinh, Mahes M. Ekanayake, Armando J. Gonzalez
  • Publication number: 20130156134
    Abstract: A receiver for a wireless communication device provides a dual path receiver receiving first and second protocol-agnostic, uncorrelated receive signals simultaneously. The dual path receiver generating first and second offset IF signals from the simultaneously received first and second protocol-agnostic, uncorrelated receive signals. The receiver utilizes at least one converter for converting the first and second offset IF signals into at least one serial synchronous interface (SSI) signal representing the spectrum at IF. At least one processor receives the at least one SSI signal and applies parallel processing paths to demodulate the at least one SSI signal into separate baseband signals. The processor provides interference detection of, and level control for, the first and second offset IF signals.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Applicant: MOTOROLA SOLUTIONS, INC.
    Inventors: Ariel L. Galan, Young-Seo Park, Charles H. Carter, Charles R. Ruelke, Darrell Stogner
  • Patent number: 8442474
    Abstract: An apparatus and method for demodulating an FM RF signal is presented. An Adaptive Differentiate Cross Multiply (ADCM) system in which the energy estimate of the desired on-channel RF is generated using adaptive filtering. The adaptive filter includes low pass filtering of the instantaneous energy estimate. The bandwidth of the LPF is adjusted in real time based on the received signal strength energy estimate, the periodicity of any changes in the energy estimate, AGC setting for the receiver, and/or the type of sub-audible signaling applied to the RF signal if known. After the bandwidth is set, the optimum filtered energy estimate is applied to the system to demodulate the received information free from distortion artifacts associated with IQ imbalance. A normalized signal in the ADCM system is clipped by a limiter whose clipping threshold is equal to a maximum gain of differentiators in the ADCM system.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: May 14, 2013
    Assignee: Motorola Solutions, Inc.
    Inventors: Yadunandana Rao, Charles R. Ruelke, Darrell J. Stogner, Richard S. Young