Patents by Inventor Philip Frank Tustin

Philip Frank Tustin 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: 10411831
    Abstract: A wireless charging in-band communication system includes a channel encoding for message error correction and detection. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepends the message with a synchronization sequence having Golay complementary codes. A receiver module receives the message from the transmitter module. A preamble detection block has a Golay complementary code correlator used for message detection, synchronization, and equalization coefficient estimation and selection. A decoding module that performs biphase demodulation with error correction with a DC offset being estimated as the average value of the signal over the length of the message before channel decoding. The decoding module performs equalization, error correction and detection channel decoding.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: September 10, 2019
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: William Plumb, Zhen Wang, Zoran Zvonar, Patrick Stanley Riehl, Anand Satyamoorthy, Philip Frank Tustin
  • Patent number: 10326314
    Abstract: A wireless power transmitter includes an inverter in which a voltage varies in response to a resonant network and circuitry configured to (A) measure a characteristic indicative of a load seen by the wireless power transmitter, (B) determine a duty cycle of the inverter based upon the characteristic, and (C) switch the inverter with the determined duty cycle.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: June 18, 2019
    Assignee: MediaTek Inc.
    Inventors: Patrick Stanley Riehl, Hasnain Akram, Philip Frank Tustin
  • Publication number: 20190049544
    Abstract: Circuits for controlling magnetic-based tracking systems are described. These systems may be used in virtual reality applications, for example to track in real-time the location of one or more body parts. The systems use a beacon emitting mutually orthogonal magnetic fields. On the receiver side, one or more sensors disposed on different parts of a body receive the magnetic fields. The beacon includes switching amplifiers for driving the magnetic field emitters. Being binary, these amplifiers may be controlled by binary signals. The circuits may exhibit a resonant frequency response, and may be operated off-resonance, thus providing for a better control of the magnetic fields amplitude. As a result, however, fluctuations in the envelop of the magnetic fields due to the presence of a beating tone may arise. These fluctuations may be shortened by gradually activating the drivers for the magnetic field emitters.
    Type: Application
    Filed: July 3, 2018
    Publication date: February 14, 2019
    Applicant: MEDIATEK Singapore Pte. Ltd.
    Inventors: Vladimir A. Muratov, Da-shan Shiu, William Plumb, Philip Frank Tustin
  • Patent number: 10193375
    Abstract: Methods and apparatus for providing closed loop current control in a wireless power transmitter. The method comprises adjusting a transmitter coil current generated by the wireless power transmitter based, at least in part, on first feedback reported by at least one wireless power receiver and second feedback based on a measurement of the transmitter coil current.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: January 29, 2019
    Assignee: MediaTek Inc.
    Inventors: Philip Frank Tustin, William Plumb, Patrick Stanley Riehl
  • Publication number: 20170302110
    Abstract: A wireless power transmitter includes an inverter in which a voltage varies in response to a resonant network and circuitry configured to (A) measure a characteristic indicative of a load seen by the wireless power transmitter, (B) determine a duty cycle of the inverter based upon the characteristic, and (C) switch the inverter with the determined duty cycle.
    Type: Application
    Filed: January 20, 2017
    Publication date: October 19, 2017
    Applicant: MediaTek Inc.
    Inventors: Patrick Stanley Riehl, Hasnain Akram, Philip Frank Tustin
  • Publication number: 20170222469
    Abstract: Methods and apparatus for providing closed loop current control in a wireless power transmitter. The method comprises adjusting a transmitter coil current generated by the wireless power transmitter based, at least in part, on first feedback reported by at least one wireless power receiver and second feedback based on a measurement of the transmitter coil current.
    Type: Application
    Filed: November 8, 2016
    Publication date: August 3, 2017
    Applicant: MediaTek Inc.
    Inventors: Philip Frank Tustin, William Plumb, Patrick Stanley Riehl
  • Publication number: 20160254696
    Abstract: A transmitter module is used in a wireless charging system, and is used for performing in-band communication with a receiver module in the wireless charging system to provide a message to the receiver module. The transmitter module has a matching network, a rectifier and an impedance component. The matching network has at least one input terminal coupled to a coil of the transmitter module and at least one output terminal. The rectifier is coupled to the output terminal of the matching network. The impedance component is selectively coupled to the output terminal of the matching network to vary a reflected impedance of the transmitter module seen by the receiver module. By varying the reflected impedance of the transmitter module seen by the receiver module, the transmitter module communicates with the receiver module to provide power control commands, status and/or foreign object detection information.
    Type: Application
    Filed: May 6, 2016
    Publication date: September 1, 2016
    Inventors: William Plumb, Zhen Wang, Zoran Zvonar, Patrick Stanley Riehl, Anand Satyamoorthy, Philip Frank Tustin
  • Patent number: 9363041
    Abstract: A wireless charging in-band communication system includes a transmitter module that formats a message using CRC calculation and attaches the results of the CRC calculation to the message for message error detection. The transmitter includes channel encoding for message error correction. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepending the message with a synchronization sequence having Golay complementary codes. Moreover, the in-band communication includes a receiver module that receives the message from the transmitter module. The receiver module includes an impedance sensing circuit to detect changes in the reflected impedance of the transmitter module. The receiver module includes a front end filter used for pulse shaping and noise rejection.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: June 7, 2016
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: William Plumb, Zhen Wang, Zoran Zvonar, Patrick Stanley Riehl, Anand Satyamoorthy, Philip Frank Tustin
  • Publication number: 20140314170
    Abstract: A wireless charging in-band communication system includes a transmitter module that formats a message using CRC calculation and attaches the results of the CRC calculation to the message for message error detection. The transmitter includes channel encoding for message error correction. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepending the message with a synchronization sequence having Golay complementary codes. Moreover, the in-band communication includes a receiver module that receives the message from the transmitter module. The receiver module includes an impedance sensing circuit to detect changes in the reflected impedance of the transmitter module. The receiver module includes a front end filter used for pulse shaping and noise rejection.
    Type: Application
    Filed: October 25, 2013
    Publication date: October 23, 2014
    Inventors: William Plumb, Zhen Wang, Zoran Zvonar, Patrick Stanley Riehl, Anand Satyamoorthy, Philip Frank Tustin
  • Publication number: 20140269886
    Abstract: A wireless charging in-band communication system includes a channel encoding for message error correction and detection. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepends the message with a synchronization sequence having Golay complementary codes. A receiver module receives the message from the transmitter module. A preamble detection block has a Golay complementary code correlator used for message detection, synchronization, and equalization coefficient estimation and selection. A decoding module that performs biphase demodulation with error correction with a DC offset being estimated as the average value of the signal over the length of the message before channel decoding. The decoding module performs equalization, error correction and detection channel decoding.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 18, 2014
    Inventors: William Plumb, Zhen Wang, Zoran Zvonar, Patrick Stanley Riehl, Anand Satyamoorthy, Philip Frank Tustin