Patents by Inventor Tony Doy

Tony Doy 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: 10327061
    Abstract: Example techniques may involve controlling a passive radiator. An implementation may include a device playing back an input signal representing audio content via one or more active speakers. The device measures excursion of the passive radiator when the input signal is played back via the one or more active speakers. The device limits excursion of the passive radiator to less than an excursion limit when certain input causes the passive radiator to move beyond the excursion limit.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: June 18, 2019
    Assignee: Sonos, Inc.
    Inventor: Tony Doy
  • Publication number: 20180324521
    Abstract: Example techniques may involve controlling a passive radiator. An implementation may include a device playing back an input signal representing audio content via one or more active speakers. The device measures excursion of the passive radiator when the input signal is played back via the one or more active speakers. The device limits excursion of the passive radiator to less than an excursion limit when certain input causes the passive radiator to move beyond the excursion limit.
    Type: Application
    Filed: May 7, 2018
    Publication date: November 8, 2018
    Inventor: Tony Doy
  • Patent number: 9967655
    Abstract: Example techniques may involve controlling a passive radiator. An implementation may include a device buffering successive samples of audio content. For sets of buffered samples, the device predicts excursion of the passive radiator caused by playback of the respective set of buffered samples by active speakers via a model. The device limits excursion of the passive radiator to less than an excursion limit when certain sets of buffered samples are predicted to cause the passive radiator to move beyond the excursion limit. The device plays back the successive samples of the modified audio content via the active speakers. The device measures excursion of the passive radiator when sets of buffered samples are played back via the active speakers. For sets of samples, the device determines respective differences between the predicted excursion and the measured excursion and adjusts the model to offset determined differences between the predicted and measured excursion.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: May 8, 2018
    Assignee: Sonos, Inc.
    Inventor: Tony Doy
  • Publication number: 20180103313
    Abstract: Example techniques may involve controlling a passive radiator. An implementation may include a device buffering successive samples of audio content. For sets of buffered samples, the device predicts excursion of the passive radiator caused by playback of the respective set of buffered samples by active speakers via a model. The device limits excursion of the passive radiator to less than an excursion limit when certain sets of buffered samples are predicted to cause the passive radiator to move beyond the excursion limit. The device plays back the successive samples of the modified audio content via the active speakers. The device measures excursion of the passive radiator when sets of buffered samples are played back via the active speakers. For sets of samples, the device determines respective differences between the predicted excursion and the measured excursion and adjusts the model to offset determined differences between the predicted and measured excursion.
    Type: Application
    Filed: October 6, 2016
    Publication date: April 12, 2018
    Inventor: Tony Doy
  • Patent number: 8638170
    Abstract: A headphone driver amplifier operative from a single DC voltage supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: January 28, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Tony Doy
  • Patent number: 8476978
    Abstract: A headphone driver amplifier operative without an external negative voltage power supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (O volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: July 2, 2013
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Tony Doy
  • Publication number: 20100202635
    Abstract: A headphone driver amplifier operative from a single DC voltage supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Application
    Filed: March 12, 2010
    Publication date: August 12, 2010
    Inventor: Tony Doy
  • Patent number: 7714661
    Abstract: A driver amplifier operative from a single DC voltage supply, coupled directly to the output load without the need for DC coupling capacitors used for preventing DC reaching the output load. An onboard power supply generates a negative voltage rail that powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the load and the need for DC coupling capacitors is eliminated.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: May 11, 2010
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Tony Doy, Ronald Koo
  • Publication number: 20090003618
    Abstract: A headphone driver amplifier operative without an external negative voltage power supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (O volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Application
    Filed: September 8, 2008
    Publication date: January 1, 2009
    Inventor: Tony Doy
  • Publication number: 20080273120
    Abstract: A driver amplifier operative from a single DC voltage supply, coupled directly to the output load without the need for DC coupling capacitors used for preventing DC reaching the output load. An onboard power supply generates a negative voltage rail that powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the load and the need for DC coupling capacitors is eliminated.
    Type: Application
    Filed: May 6, 2008
    Publication date: November 6, 2008
    Inventors: Tony DOY, Ronal KOO
  • Publication number: 20070229169
    Abstract: A driver amplifier operative from a single DC voltage supply, coupled directly to the output load without the need for DC coupling capacitors used for preventing DC reaching the output load. An onboard power supply generates a negative voltage rail that powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the load and the need for DC coupling capacitors is eliminated.
    Type: Application
    Filed: February 26, 2007
    Publication date: October 4, 2007
    Inventors: Tony Doy, Ronald Koo
  • Patent number: 7183857
    Abstract: A driver amplifier operative from a single DC voltage supply, coupled directly to the output load without the need for DC coupling capacitors used for preventing DC reaching the output load. An onboard power supply generates a negative voltage rail that powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the load and the need for DC coupling capacitors is eliminated.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: February 27, 2007
    Assignee: Maxim Integrated Products Inc.
    Inventors: Tony Doy, Ronald Koo
  • Patent number: 7061327
    Abstract: A headphone driver amplifier operative from a single DC voltage supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: June 13, 2006
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Tony Doy
  • Patent number: 7061328
    Abstract: A headphone driver amplifier operative from a single DC voltage supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (O volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: June 13, 2006
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Tony Doy
  • Publication number: 20060066409
    Abstract: A headphone driver amplifier operative from a single DC voltage supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (O volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Application
    Filed: November 17, 2005
    Publication date: March 30, 2006
    Inventor: Tony Doy
  • Publication number: 20050184807
    Abstract: A driver amplifier operative from a single DC voltage supply, coupled directly to the output load without the need for DC coupling capacitors used for preventing DC reaching the output load. An onboard power supply generates a negative voltage rail that powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the load and the need for DC coupling capacitors is eliminated.
    Type: Application
    Filed: January 18, 2005
    Publication date: August 25, 2005
    Inventors: Tony Doy, Ronald Koo
  • Publication number: 20030138112
    Abstract: A headphone driver amplifier operative from a single DC voltage supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (O volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
    Type: Application
    Filed: January 24, 2002
    Publication date: July 24, 2003
    Inventor: Tony Doy