Patents by Inventor Michael S. Johnson

Michael S. Johnson 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: 20240267005
    Abstract: A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to amplify the delayed oscillating signal for transmission sufficient to produce interference, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
    Type: Application
    Filed: April 18, 2024
    Publication date: August 8, 2024
    Inventors: Rangakrishnan Srinivasan, Mustafa H. Koroglu, Zhongda Wang, Francesco Barale, Abdulkerim L. Coban, John M. Khoury, Sriharsha Vasadi, Michael S. Johnson, Vitor Pereira
  • Patent number: 12028024
    Abstract: A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to use the delayed oscillating signal for transmitting a signal, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: July 2, 2024
    Assignee: Silicon Laboratories Inc.
    Inventors: Rangakrishnan Srinivasan, Mustafa H. Koroglu, Zhongda Wang, Francesco Barale, Abdulkerim L Coban, John M. Khoury, Sriharsha Vasadi, Michael S. Johnson, Vitor Pereira
  • Patent number: 12009793
    Abstract: In one embodiment, a dual-mode power amplifier that can operate in different modes includes: a first pair of metal oxide semiconductor field effect transistors (MOSFETs) to receive and pass a constant envelope signal; a second pair of MOSFETs to receive and pass a variable envelope signal, where first terminals of the first pair of MOSFETs are coupled to first terminals of the second pair of MOSFETs, and second terminals of the first pair of MOSFETs are coupled to. second terminals of the second pair of MOSFETs; and a shared MOSFET stack coupled to the first pair of MOSFETs and the second pair of MOSFETs.
    Type: Grant
    Filed: February 28, 2023
    Date of Patent: June 11, 2024
    Assignee: Silicon Laboratories Inc.
    Inventors: Ruifeng Sun, Sherry Wu, Michael S. Johnson, Vitor Pereira
  • Publication number: 20230208368
    Abstract: In one embodiment, a dual-mode power amplifier that can operate in different modes includes: a first pair of metal oxide semiconductor field effect transistors (MOSFETs) to receive and pass a constant envelope signal; a second pair of MOSFETs to receive and pass a variable envelope signal, where first terminals of the first pair of MOSFETs are coupled to first terminals of the second pair of MOSFETs, and second terminals of the first pair of MOSFETs are coupled to. second terminals of the second pair of MOSFETs; and a shared MOSFET stack coupled to the first pair of MOSFETs and the second pair of MOSFETs.
    Type: Application
    Filed: February 28, 2023
    Publication date: June 29, 2023
    Inventors: Ruifeng Sun, Sherry Wu, Michael S. Johnson, Vitor Pereira
  • Patent number: 11646705
    Abstract: In one embodiment, a dual-mode power amplifier that can operate in different modes includes: a first pair of metal oxide semiconductor field effect transistors (MOSFETs) to receive and pass a constant envelope signal; a second pair of MOSFETs to receive and pass a variable envelope signal, where first terminals of the first pair of MOSFETs are coupled to first terminals of the second pair of MOSFETs, and second terminals of the first pair of MOSFETs are coupled to. second terminals of the second pair of MOSFETs; and a shared MOSFET stack coupled to the first pair of MOSFETs and the second pair of MOSFETs.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: May 9, 2023
    Assignee: Silicon Laboratories Inc.
    Inventors: Ruifeng Sun, Sherry Wu, Michael S. Johnson, Vitor Pereira
  • Publication number: 20230006621
    Abstract: In one embodiment, a dual-mode power amplifier that can operate in different modes includes: a first pair of metal oxide semiconductor field effect transistors (MOSFETs) to receive and pass a constant envelope signal; a second pair of MOSFETs to receive and pass a variable envelope signal, where first terminals of the first pair of MOSFETs are coupled to first terminals of the second pair of MOSFETs, and second terminals of the first pair of MOSFETs are coupled to. second terminals of the second pair of MOSFETs; and a shared MOSFET stack coupled to the first pair of MOSFETs and the second pair of MOSFETs.
    Type: Application
    Filed: June 30, 2021
    Publication date: January 5, 2023
    Inventors: Ruifeng Sun, Sherry Wu, Michael S. Johnson, Vitor Pereira
  • Publication number: 20210175855
    Abstract: A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to use the delayed oscillating signal for transmitting a signal, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 10, 2021
    Inventors: Rangakrishnan Srinivasan, Mustafa H. Koroglu, Zhongda Wang, Francesco Barale, Abdulkerim L. Coban, John M. Khoury, Sriharsha Vasadi, Michael S. Johnson, Vitor Pereira
  • Patent number: 10290189
    Abstract: An automated banking machine operative to cause financial transfers responsive to data read from data bearing records. The automated banking machine includes a card reader that is operative to read card data from user cards corresponding to financial accounts. The automated banking machine is operative responsive to the card data to carry out transactions that transfer and/or allocate funds between accounts. The automated banking machine is further operative to provide users with a receipt for transactions conducted. The automated banking machine includes a cash dispenser operative to dispense cash to machine users and to cause the value of cash to be assessed to financial accounts corresponding to card data. The automated banking machine is further operative to receive currency bills or other sheets from a user and to process and store such sheets through operation of a currency accepting device. The account corresponding to card data may be credited for the value of bills or other sheets received.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: May 14, 2019
    Assignee: Diebold Nixdorf, Incorporated
    Inventors: Jeffrey M. Eastman, Brian Jones, Michael S. Johnson, Shawn Griggy, Jeff A. Brannan, Michael J. Harty, Robert W. Barnett, Eric S. VanKeulen, Mike P. Ryan, William D. Beskitt, Kenneth Turocy
  • Patent number: 10256854
    Abstract: In an embodiment, an apparatus includes: a transmit circuit to upconvert a baseband signal to a first differential radio frequency (RF) signal, the transmit circuit to convert the first differential RF signal to a first single-ended RF signal; a duty cycle correction circuit coupled to the transmit circuit to receive the first single-ended RF signal and compensate for a duty cycle variation in the first single-ended RF signal to output a duty cycle-corrected RF signal; a conversion circuit to convert the duty cycle-corrected RF signal to a second differential RF signal; and an interface circuit to transfer the second differential RF signal from a first ground domain to a second ground domain.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: April 9, 2019
    Assignee: Silicon Laboratories Inc.
    Inventors: Rangakrishnan Srinivasan, Sriharsha Vasadi, Zhongda Wang, Mustafa H. Koroglu, John M. Khoury, Aslamali A. Rafi, Michael S. Johnson, Francesco Barale, Sherry Xiaohong Wu
  • Publication number: 20180174405
    Abstract: An automated banking machine operative to cause financial transfers responsive to data read from data bearing records. The automated banking machine includes a card reader that is operative to read card data from user cards corresponding to financial accounts. The automated banking machine is operative responsive to the card data to carry out transactions that transfer and/or allocate funds between accounts. The automated banking machine is further operative to provide users with a receipt for transactions conducted. The automated banking machine includes a cash dispenser operative to dispense cash to machine users and to cause the value of cash to be assessed to financial accounts corresponding to card data. The automated banking machine is further operative to receive currency bills or other sheets from a user and to process and store such sheets through operation of a currency accepting device. The account corresponding to card data may be credited for the value of bills or other sheets received.
    Type: Application
    Filed: February 20, 2018
    Publication date: June 21, 2018
    Inventors: Jeffrey M. EASTMAN, Brian Jones, Michael S. Johnson, Shawn Griggy, Jeff A. Brannan, Michael J. Harty, Robert W. Barnett, Eric S. VanKeulen, Mike P. Ryan, William D. BESKITT, Kenneth Turocy
  • Patent number: 9898900
    Abstract: An automated banking machine operative to cause financial transfers responsive to data read from data bearing records. The automated banking machine includes a card reader that is operative to read card data from user cards corresponding to financial accounts. The automated banking machine is operative responsive to the card data to carry out transactions that transfer and/or allocate funds between accounts. The automated banking machine is further operative to provide users with a receipt for transactions conducted. The automated banking machine includes a cash dispenser operative to dispense cash to machine users and to cause the value of cash to be assessed to financial accounts corresponding to card data. The automated banking machine is further operative to receive currency bills or other sheets from a user and to process and store such sheets through operation of a currency accepting device. The account corresponding to card data may be credited for the value of bills or other sheets received.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: February 20, 2018
    Assignee: Diebold Nixdorf, Incorporated
    Inventors: Jeffrey M. Eastman, Brian Jones, Michael S. Johnson, Shawn Griggy, Jeff A. Brannan, Michael J. Harty, Robert W. Barnett, Eric S. Vankeulen, Mike P. Ryan, William D. Beskitt, Kenneth Turocy
  • Publication number: 20170046925
    Abstract: An automated banking machine operative to cause financial transfers responsive to data read from data bearing records. The automated banking machine includes a card reader that is operative to read card data from user cards corresponding to financial accounts. The automated banking machine is operative responsive to the card data to carry out transactions that transfer and/or allocate funds between accounts. The automated banking machine is further operative to provide users with a receipt for transactions conducted. The automated banking machine includes a cash dispenser operative to dispense cash to machine users and to cause the value of cash to be assessed to financial accounts corresponding to card data. The automated banking machine is further operative to receive currency bills or other sheets from a user and to process and store such sheets through operation of a currency accepting device. The account corresponding to card data may be credited for the value of bills or other sheets received.
    Type: Application
    Filed: June 20, 2016
    Publication date: February 16, 2017
    Applicant: Diebold Self-Service Systems Div of Diebold, Inc.
    Inventors: Jeffrey M. EASTMAN, Brian JONES, Michael S. JOHNSON, Shawn GRIGGY, Jeff A. BRANNAN, Michael J. HARTY, Robert W. BARNETT, Eric S. VANKEULEN, Mike P. RYAN, William D. BESKITT, Kenneth TUROCY
  • Patent number: 9379676
    Abstract: Circuitry and methods are disclosed that may employ common mode calibration circuitry configured to at least partially calibrate out impedance differences or mismatches between the differential signal paths of differential signal circuitry. The common mode calibration circuitry may be integrated as an internal part of integrated differential signal circuitry that includes a differential amplifier to reject common mode noise, and may be used to reduce or substantially eliminate any external and/or internal difference in signal path resistance that exists between the differential signal paths of the integrated differential signal circuitry. A common mode calibration signal may be internally or externally applied to the signal inputs of differential signal circuitry, and used to determine a setting for the common mode calibration circuitry that at least partially calibrates out impedance differences or mismatches between the differential signal paths of differential signal circuitry.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: June 28, 2016
    Assignee: Silicon Laboratories Inc.
    Inventors: Michael S. Johnson, Russell Croman
  • Patent number: 9373229
    Abstract: An automated banking machine operative to cause financial transfers responsive to data read from data bearing records. The automated banking machine includes a card reader that is operative to read card data from user cards corresponding to financial accounts. The automated banking machine is operative responsive to the card data to carry out transactions that transfer and/or allocate funds between accounts. The automated banking machine is further operative to provide users with a receipt for transactions conducted. The automated banking machine includes a cash dispenser operative to dispense cash to machine users and to cause the value of cash to be assessed to financial accounts corresponding to card data. The automated banking machine is further operative to receive currency bills or other sheets from a user and to process and store such sheets through operation of a currency accepting device. The account corresponding to card data may be credited for the value of bills or other sheets received.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: June 21, 2016
    Assignee: Diebold Self-Service Systems, Division of Diebold, Incorporated
    Inventors: Jeffrey M. Eastman, Brian Jones, Michael S. Johnson, Shawn Griggy, Jeff A. Brannan, Michael J. Harty, Robert W. Barnett, Eric S. Vankeulen, Mike P. Ryan, William D. Beskitt, Kenneth Turocy
  • Patent number: 9196962
    Abstract: A long-wave or medium-wave receiver receives a first signal from a first terminal of a loopstick antenna on a positive antenna input terminal of the receiver and receives a second signal from a second terminal of the loopstick antenna on a negative antenna input terminal of the receiver. The first and second signals are processed differentially in the receiver. The receiver may optionally be configured to operate in either a differential mode or a single-ended mode by setting switches to selectively connect one of the antenna input terminals to ground in single-ended mode.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: November 24, 2015
    Assignee: Silicon Laboratories Inc.
    Inventors: Michael S. Johnson, Russell Croman, Scott D. Willingham
  • Publication number: 20150214911
    Abstract: Circuitry and methods are disclosed that may employ common mode calibration circuitry configured to at least partially calibrate out impedance differences or mismatches between the differential signal paths of differential signal circuitry. The common mode calibration circuitry may be integrated as an internal part of integrated differential signal circuitry that includes a differential amplifier to reject common mode noise, and may be used to reduce or substantially eliminate any external and/or internal difference in signal path resistance that exists between the differential signal paths of the integrated differential signal circuitry. A common mode calibration signal may be internally or externally applied to the signal inputs of differential signal circuitry, and used to determine a setting for the common mode calibration circuitry that at least partially calibrates out impedance differences or mismatches between the differential signal paths of differential signal circuitry.
    Type: Application
    Filed: January 28, 2014
    Publication date: July 30, 2015
    Inventors: Michael S. Johnson, Russell Croman
  • Patent number: 9054672
    Abstract: Variable capacitive attenuation circuitry and associated methods are disclosed that may be implemented to employ a plurality of multi-purpose capacitors that may be selectably coupled together in different configurations to form a capacitive divider having different respective attenuation properties. In a particular embodiment, each of the capacitors of the disclosed capacitive attenuation circuitry may be selectably coupled to an RF reference as either a shunt capacitor or coupled in series between an RF signal input and an attenuated RF signal output as a series capacitor, thus forming a capacitive divider having selected attenuation properties. The disclosed variable capacitive attenuation circuitry may be advantageously utilized to attenuate an input RF signal and to provide a resulting attenuated RF output signal, for example, in the front end of RF receiver circuitry.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: June 9, 2015
    Assignee: Silicon Laboratories Inc.
    Inventor: Michael S. Johnson
  • Publication number: 20150046187
    Abstract: A system and method for connecting a clinical trial participant with a transportation provider. The system, based on information from an authentication mechanism, determines whether an individual requesting desired transportation is an authenticated clinical trial participant having a participant record in a patient recruitment management system database. The system, based on information from an authorization mechanism, determines whether the authenticated clinical trial participant is an authorized clinical trial participant for procurement of the transportation being requested. When the authenticated clinical trial participant is the authorized clinical trial participant for the desired transportation, the patient recruitment management system outputs an indication of approval to connect the clinical trial participant with a transportation provider.
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Inventors: Michael S. Johnson, Joan F. Bachenheimer, Jennifer C. Dinkel, Matthew L. Kibby
  • Publication number: 20140379362
    Abstract: A clinical trial participant reimbursement system relies on a separate a patient tracking system having a patient database with a participant record unique identification string for each patient of a plurality of patients configured in such a way that maintains patient anonymity and does not itself convey patient identifying information. The clinical trial participant reimbursement system creates an association between the participant record unique identification string and a reloadable payment card unique identification string for a payment card assigned to each participant for receiving reimbursement payments. The payment card itself can be issued without being coupled to the patient's bank account, and by loading a payment card there is no need to issue checks with the patient's name (i.e., patient identifying information) thereon. The payment card can be issued with a zero balance, a pre-determined balance, or a customized balance indicated by the system and set at the time of the card activation.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 25, 2014
    Inventors: Joan F. Bachenheimer, Michael S. Johnson, Matthew L. Kibby
  • Publication number: 20140339758
    Abstract: An automated banking machine operative to cause financial transfers responsive to data read from data bearing records. The automated banking machine includes a card reader that is operative to read card data from user cards corresponding to financial accounts. The automated banking machine is operative responsive to the card data to carry out transactions that transfer and/or allocate funds between accounts. The automated banking machine is further operative to provide users with a receipt for transactions conducted. The automated banking machine includes a cash dispenser operative to dispense cash to machine users and to cause the value of cash to be assessed to financial accounts corresponding to card data. The automated banking machine is further operative to receive currency bills or other sheets from a user and to process and store such sheets through operation of a currency accepting device. The account corresponding to card data may be credited for the value of bills or other sheets received.
    Type: Application
    Filed: August 5, 2014
    Publication date: November 20, 2014
    Inventors: Jeffrey M. EASTMAN, Brian JONES, Michael S. JOHNSON, Shawn GRIGGY, Jeff A. BRANNAN, Michael J. HARTY, Robert W. BARNETT, Eric S. VANKEULEN, Mike R. RYAN, William D. BESKITT, Kenneth TUROCY