Patents by Inventor John Martin Horan

John Martin Horan 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: 8280668
    Abstract: A High Definition Multi-Media Interface (HDMI) cable may exhibit frequency dependent signal attenuation, inter symbol interference, and inter-pair skew. A boost device integrated with the cable can compensate for such impairments of the cable. A self calibrating cable with a boost device of the embodiment of the invention is described, in which parameters that control the response of the boost device are set optimally in a self-calibrating process comprising looping the boosted cable on itself through a calibration fixture that contains a calibration control device. The boost device includes pattern generators and a sampling circuit. Each high speed channel of the cable is separately tested and calibrated with the help of one of the other channels serving as a sampling channel. Additional embodiments provide for a selected replica boost device and a distinct pattern generator device in the calibration fixture.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: October 2, 2012
    Assignee: Redmere Technology Ltd.
    Inventors: John Martin Horan, John Anthony Keane, Gerard David Guthrie
  • Patent number: 8280669
    Abstract: An HDMI cable may exhibit frequency dependent signal attenuation, inter symbol interference, and inter-pair skew. A boost device integrated with the cable can compensate for such impairments of the cable. A self calibrating cable with a boost device of the embodiment of the invention is described, in which parameters that control the response of the boost device are set optimally in a self-calibrating process including looping the boosted cable on itself through a calibration fixture that contains a calibration control device. The boost device includes pattern generators and a sampling circuit. Each high speed channel of the cable is separately tested and calibrated with the help of one of the other channels serving as a sampling channel.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: October 2, 2012
    Assignee: Redmere Technology Ltd.
    Inventors: John Martin Horan, John Anthony Keane, Gerard David Guthrie
  • Patent number: 8272023
    Abstract: A High Definition Multimedia Interface (HDMI) cable carries high speed encoded data, which are transmitted differentially over data channels, along with a clock. A Mobile High-Definition Link (MHL) cable carries high speed data which are multiplexed to achieve smaller connectors with fewer pins. A MHL-to-HDMI cable is proposed, which includes an embedded MHL to HDMI adapter device for demultiplexing the received MHL-formatted signal and outputting an HDMI-formatted signal. The embedded circuit is powered by a combination of power sources, the power being harvested from the high-speed HDMI signals themselves, including a startup circuit harvesting power from a low speed HDMI signal when power from the high-speed HDMI signals is not available.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: September 18, 2012
    Assignee: Redmere Technology Ltd.
    Inventors: John Martin Horan, David McGowan
  • Patent number: 8254402
    Abstract: An HDMI cable carries high speed encoded data which are transmitted differentially over data channels, along with a clock. High-frequency loss and differential skew within a differential signal may be compensated by analog circuits embedded in the cable. These embedded circuits are tuned at production for best performance by observing the quality of the recovered analog signal. The embedded circuits are powered by a combination of power sources, both carried within the cable, and harvested from the high-speed signals themselves. Methods are provided for deskewing, equalizing, and boosting the differential signals in the embedded circuits that are mounted on a PCB.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: August 28, 2012
    Assignee: Remere Technology Ltd.
    Inventors: Aidan Gerard Keady, John Anthony Keane, Judith Ann Rea, Benjamin Griffin, John Martin Horan
  • Publication number: 20120012359
    Abstract: A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI) or DisplayPort standards, and includes a raw cable. The raw cable is constructed with either Shielded Twisted Pairs (STP) or coaxial lines which carry all signals on either shielded conductors or their shields. Some auxiliary signals including power are carried on ungrounded shields. This achieves a reduction in the number of wires in the cable leading to a thinner, lighter, and less costly HDMI or DisplayPort Cable. The use of a uniform technology, either STP or coax, also permits simpler and lower cost production and assembly of the cable.
    Type: Application
    Filed: March 3, 2011
    Publication date: January 19, 2012
    Inventors: John Martin Horan, Gerald Donal Murphy, David William Mc Gowan
  • Publication number: 20120012360
    Abstract: A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI), and includes a raw cable and may include a boost device. The raw cable includes coaxial lines which are covered by an outer metallic braid. Each of four high speed video signals is carried on the inner conductors of a pair of coaxial lines. Lower speed signals are carried on the galvanically or capacitively coupled shields of a pair of coaxial lines, as well as the braid of the cable, thus permitting fourteen HDMI signals to be carried in a cable comprising only eight coaxial lines, resulting in a simpler and lower cost production and assembly of the cable.
    Type: Application
    Filed: March 3, 2011
    Publication date: January 19, 2012
    Inventors: John Martin Horan, Gerald Donal Murphy, David William Mc Gowan
  • Publication number: 20120012387
    Abstract: A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI) or DisplayPort standards, and includes a raw cable and a boost device. The raw cable includes coaxial lines of a characteristic cable impedance lower than the impedance implied in the standards. The correct impedance is observed at the sending end by series resistors mounted in the first cable connector. The resultant loss of signal is made up with the boost device mounted in the connector at the other end of the cable. Reducing the cable impedance reduces the diameter of the coaxial shields to result a thinner cable, or conversely increases the wire gauge of the conductors to avoid the higher cost and fragility of very thin coax wires, thus permitting simpler and lower cost production and assembly of the cable. Similar advantages are obtained when Shielded Twisted Pairs (STP) are used instead of coaxial lines.
    Type: Application
    Filed: July 13, 2010
    Publication date: January 19, 2012
    Inventors: John Martin Horan, Gerald Donal Murphy, David William Mc Gowan, John Anthony Keane
  • Publication number: 20120012389
    Abstract: A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI), and includes a raw cable and a boost device. Each of four high speed video signals is carried on the inner conductors of a pair of coaxial lines in the raw cable. The boost device receives only one of the polarities of one of the high speed video signals, and generates a differential signal therefrom. Lower speed signals are carried on the galvanically or capacitively coupled shields of a pair of coaxial lines, thus permitting fourteen HDMI signals to be carried in a cable comprising only eight coaxial lines, resulting in a simpler and lower cost production and assembly of the cable.
    Type: Application
    Filed: March 3, 2011
    Publication date: January 19, 2012
    Inventors: John Martin Horan, Gerald Donald Murphy, David William Mc Gowan
  • Publication number: 20120012388
    Abstract: A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI) or DisplayPort standards, and includes a raw cable and a boost device. The raw cable is exclusively constructed with either Shielded Twisted Pairs (STP) or coaxial lines which to carry all signals on either shielded wires or their shields. The high speed signals are carried on the shielded wires to the boost device where any common mode noise induced by the signals on the shields is removed. Some auxiliary signals including power are carried on ungrounded shields. This achieves a reduction in the number of wires in the cable leading to a thinner, lighter, and less costly HDMI or DisplayPort Cable. The use of a uniform technology, either STP or coax, also permits simpler and lower cost production and assembly of the cable.
    Type: Application
    Filed: July 13, 2010
    Publication date: January 19, 2012
    Inventors: John Martin Horan, Gerald Donal Murphy, David William Mc Gowan, John Anthony Keane
  • Publication number: 20120012358
    Abstract: A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI) or DisplayPort standards, and includes a raw cable and may include a boost device. The raw cable includes coaxial lines of a characteristic cable impedance higher than the impedance implied in the standards. The correct impedance is observed at the sending end by shunt resistors mounted in the first cable connector. The resultant loss of signal may be made up with the boost device mounted in the connector at the other end of the cable in the case of a long cable. Increasing the cable impedance reduces the inherent loss of the raw cable thus permitting the use of low cost material such as tinned wires. Similar advantages are obtained regardless whether Shielded Twisted Pairs (STP) or coaxial lines are used.
    Type: Application
    Filed: March 3, 2011
    Publication date: January 19, 2012
    Inventors: John Martin Horan, Gerald Donal Murphy, David William Mc Gowan
  • Publication number: 20120012357
    Abstract: A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI), and includes a raw cable and a boost device. Each of four high speed video signals is carried on the inner conductors of a pair of coaxial lines in the raw cable. Lower speed signals are carried on the galvanically or capacitively coupled shields of a pair of coaxial lines, thus permitting fourteen HDMI signals to be carried in a cable comprising only eight coaxial lines, resulting in a simpler and lower cost production and assembly of the cable.
    Type: Application
    Filed: March 3, 2011
    Publication date: January 19, 2012
    Inventors: John Martin Horan, Gerald Donal Murphy, David William Mc Gowan
  • Patent number: 8073647
    Abstract: A High Definition Multi-Media Interface (HDMI) cable may exhibit frequency dependent signal attenuation, inter symbol interference, and inter-pair skew. A boost device integrated with the cable can compensate for such impairments of the cable. A self calibrating cable with a boost device of the embodiment of the invention is described, in which parameters that control the response of the boost device are set optimally in a self-calibrating process comprising looping the boosted cable on itself through a calibration fixture that contains a calibration control device. The boost device includes pattern generators and a sampling circuit. Each high speed channel of the cable is separately tested and calibrated with the help of one of the other channels serving as a sampling channel. Additional embodiments provide for a selected replica boost device and a distinct pattern generator device in the calibration fixture.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: December 6, 2011
    Assignee: Redmere Technology Ltd.
    Inventors: John Martin Horan, John Anthony Keane, Gerard David Guthrie
  • Patent number: 8058918
    Abstract: An HDMI cable carries high speed encoded data which are transmitted differentially over data channels, along with a clock. High-frequency loss and differential skew within a differential signal may be compensated by analog circuits embedded in the cable. These embedded circuits are tuned at production for best performance by observing the quality of the recovered analog signal. The embedded circuits are powered by a combination of power sources, both carried within the cable, and harvested from the high-speed signals themselves.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: November 15, 2011
    Assignee: Redmere Technology Ltd.
    Inventors: Aidan Gerard Keady, John Anthony Keane, Judith Ann Rea, Benjamin Griffin, John Martin Horan
  • Publication number: 20110238357
    Abstract: An HDMI cable may exhibit frequency dependent signal attenuation, inter symbol interference, and inter-pair skew. A boost device integrated with the cable can compensate for such impairments of the cable. A self calibrating cable with a boost device of the embodiment of the invention is described, in which parameters that control the response of the boost device are set optimally in a self-calibrating process comprising looping the boosted cable on itself through a calibration fixture that contains a calibration control device. The boost device includes pattern generators and a sampling circuit. Each high speed channel of the cable is separately tested and calibrated with the help of one of the other channels serving as a sampling channel.
    Type: Application
    Filed: June 6, 2011
    Publication date: September 29, 2011
    Inventors: John Martin Horan, John Anthony Keane, Gerard David Guthrie
  • Patent number: 8006277
    Abstract: A method for providing power to a boost device in a high-speed cable connected between a transmitting data source device and a receiving data sink device is described. The method comprises receiving differential data signals from the data source device in a differential input circuit of the boost device; boosting at least one of the received differential data signals into a boosted differential data signal; transmitting the boosted differential data signal from a differential output circuit of the boost device to the receiving data sink device; and obtaining power to operate at least some of the circuitry of the boost device from the data sink device through its connection with the differential output circuit, for example, providing at least some of the power to operate the processing block. A corresponding high-speed cable is also described.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: August 23, 2011
    Assignee: Redmere Technology Ltd.
    Inventors: Aidan Gerard Keady, John Anthony Keane, Judith Ann Rea, Benjamin Griffin, John Martin Horan
  • Patent number: 7996584
    Abstract: An HDMI cable carries high speed encoded data which are transmitted differentially over data channels, along with a clock. High-frequency loss and differential skew within a differential signal may be compensated by analog circuits embedded in the cable. These embedded circuits are tuned at production for best performance by observing the quality of the recovered analog signal. The embedded circuits are powered by a combination of power sources, both carried within the cable, and harvested from the high-speed signals themselves.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: August 9, 2011
    Assignee: Redmere Technology Ltd.
    Inventors: Aidan Gerard Keady, John Anthony Keane, Judith Ann Rea, Benjamin Griffin, John Martin Horan
  • Patent number: 7970567
    Abstract: An HDMI cable may exhibit frequency dependent signal attenuation, inter symbol interference, and inter-pair skew. A boost device integrated with the cable can compensate for such impairments of the cable. A self calibrating cable with a boost device of the embodiment of the invention is described, in which parameters that control the response of the boost device are set optimally in a self-calibrating process comprising looping the boosted cable on itself through a calibration fixture that contains a calibration control device. The boost device includes pattern generators and a sampling circuit. Each high speed channel of the cable is separately tested and calibrated with the help of one of the other channels serving as a sampling channel.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: June 28, 2011
    Assignee: Redmere Technology Ltd.
    Inventors: John Martin Horan, John Anthony Keane, Gerard David Guthrie
  • Publication number: 20110154428
    Abstract: A method for providing power to a boost device in a high-speed cable connected between a transmitting data source device and a receiving data sink device is described. The method comprises receiving differential data signals from the data source device in a differential input circuit of the boost device; boosting at least one of the received differential data signals into a boosted differential data signal; transmitting the boosted differential data signal from a differential output circuit of the boost device to the receiving data sink device; and obtaining power to operate at least some of the circuitry of the boost device from the data sink device through its connection with the differential output circuit, for example, providing at least some of the power to operate the processing block. A corresponding high-speed cable is also described.
    Type: Application
    Filed: March 2, 2011
    Publication date: June 23, 2011
    Inventors: Aidan Gerard Keady, John Anthony Keane, Judith Ann Rea, Benjamin Griffin, John Martin Horan
  • Patent number: 7937605
    Abstract: A high-definition multimedia interface (HDMI) receiver recovers high speed encoded data which are transmitted differentially over data channels of a lossy cable, along with a clock. Inter symbol interference, high-frequency loss, skew between the clock and data channels, and differential skew within a differential signal are compensated by analog circuits which are automatically tuned for best performance by observing the quality of the recovered analog signal. Oversampling is used to provide a 24-bit digital representation of the analog signal for determining the quality of the signal. A corresponding method of deskewing a differential signal and a system and circuit therefor are also provided.
    Type: Grant
    Filed: January 13, 2007
    Date of Patent: May 3, 2011
    Assignee: Redmere Technology Ltd.
    Inventors: Judith Ann Rea, Aidan Gerard Keady, John Anthony Keane, John Martin Horan
  • Patent number: 7936197
    Abstract: An HDMI cable carries high speed encoded data which are transmitted differentially over data channels, along with a clock. High-frequency loss and differential skew within a differential signal may be compensated by analog circuits embedded in the cable. These embedded circuits are tuned at production for best performance by observing the quality of the recovered analog signal. The embedded circuits are powered by a combination of power sources, both carried within the cable, and harvested from the high-speed signals themselves.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: May 3, 2011
    Assignee: Redmere Technology Ltd.
    Inventors: Aidan Gerard Keady, John Anthony Keane, Judith Ann Rea, Benjamin Griffin, John Martin Horan