Patents by Inventor Patrick Stanley Riehl

Patrick Stanley Riehl 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: 10916972
    Abstract: An apparatus and method for performing foreign object detection for a wireless power transmitter. A matching network and transmit coil are energized, and a resonance is excited. The resonance is allowed to decay. A temporal characteristic of the decay is measured. The temporal characteristic is analyzed to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: February 9, 2021
    Assignee: MediaTek Inc.
    Inventors: Vladimir A. Muratov, Patrick Stanley Riehl, William Plumb
  • Patent number: 10877072
    Abstract: Apparatus and methods for sensing current carried by one or more planar conductors is described. A plurality of sensing coils may be fabricated adjacent to one or more planar, current-carrying conductors. The sensing coils may detect a magnetic field generated by time-varying current flowing through the one or more planar conductors. The sensing coils may be arranged to cancel uniform and linear-gradient magnetic fields.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: December 29, 2020
    Assignee: MediaTek Inc.
    Inventors: Patrick Stanley Riehl, Anand Satyamoorthy, Vladimir A. Muratov
  • Publication number: 20200241049
    Abstract: Apparatus and methods for sensing current carried by one or more planar conductors is described. A plurality of sensing coils may be fabricated adjacent to one or more planar, current-carrying conductors. The sensing coils may detect a magnetic field generated by time-varying current flowing through the one or more planar conductors. The sensing coils may be arranged to cancel uniform and linear-gradient magnetic fields.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: MediaTek Inc.
    Inventors: Patrick Stanley Riehl, Anand Satyamoorthy, Vladimir A. Muratov
  • Patent number: 10658869
    Abstract: Apparatus and methods for dual-mode wireless power transfer are described. Two power transmit coils may be configured to provide magnetic resonant and magnetic inductance wireless power transfer from a same charging area of a wireless power transmitter. The coils and magnetic backing may be arranged to provide similar power transfer performance for the two power transfer methodologies.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: May 19, 2020
    Assignee: MediaTek Inc.
    Inventors: Vladimir A. Muratov, Patrick Stanley Riehl
  • Patent number: 10656185
    Abstract: Apparatus and methods for sensing current carried by one or more planar conductors is described. A plurality of sensing coils may be fabricated adjacent to one or more planar, current-carrying conductors. The sensing coils may detect a magnetic field generated by time-varying current flowing through the one or more planar conductors. The sensing coils may be arranged to cancel uniform and linear-gradient magnetic fields.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: May 19, 2020
    Assignee: MediaTek Inc.
    Inventors: Patrick Stanley Riehl, Anand Satyamoorthy, Vladimir A. Muratov
  • 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
  • Publication number: 20190199142
    Abstract: An apparatus and method for performing foreign object detection for a wireless power transmitter. A matching network and transmit coil are energized, and a resonance is excited. The resonance is allowed to decay. A temporal characteristic of the decay is measured. The temporal characteristic is analyzed to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.
    Type: Application
    Filed: December 20, 2018
    Publication date: June 27, 2019
    Applicant: MediaTek Inc.
    Inventors: Vladimir A. Muratov, Patrick Stanley Riehl, William Plumb
  • 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
  • Patent number: 10291127
    Abstract: Methods and circuits for controlling a synchronous rectifier. An operating condition of the synchronous rectifier is detected. A voltage level applied to turn on at least one transistor of the synchronous rectifier us modified based upon the detected operating condition, to improve efficiency of the synchronous rectifier.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: May 14, 2019
    Assignee: MediaTek Inc.
    Inventors: Hasnain Akram, Patrick Stanley Riehl
  • Patent number: 10283997
    Abstract: A wireless power transfer apparatus includes a support structure having a top surface and a side surface. The support structure is configured to support a mobile device on the top surface and a wearable device at the side surface. The wireless power transfer apparatus also includes a plurality of transmit coils within the support structure. The plurality of transmit coils are configured to wirelessly transmit power to the mobile device on the top surface and the wearable device at the side surface.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: May 7, 2019
    Assignee: MediaTek Inc.
    Inventors: Anand Satyamoorthy, Patrick Stanley Riehl, William Kirwin, Ron-Chi Kuo
  • Patent number: 10277072
    Abstract: A wireless power receiver IC in which the power path can be reconfigured as either a low-dropout regulator (LDO), a switched-mode power supply (SMPS) or a power switch (PSW) is provided. All three modes share the same pass device to reduce die area and share the same output terminal to reduce pin. In an inductive wireless receiver, the power path can be reprogrammed on the fly to LDO or PSW mode or can be reprogrammed on the fly to SMPS or PSW mode. In a resonant or multi-mode wireless receiver, the power path can be reprogrammed on the fly to SMPS or PSW mode. Furthermore, to achieve high power transfer efficiency performance, using N-channel MOSFET as its pass device has better efficiency and smaller die area than P-channel MOSFET pass device.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: April 30, 2019
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: Yung-Chih Yen, Patrick Stanley Riehl, Hasnain Akram, Anand Satyamoorthy
  • Patent number: 10211677
    Abstract: A mobile device includes a housing having a conductive region and a wireless power receiver having a receive coil configured to receive wireless power through the conductive region. The thickness of the conductive region is less than ?/10, wherein ? is a skin depth of the conductive region at a primary frequency of an electromagnetic signal that provides the wireless power.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: February 19, 2019
    Assignee: MediaTek Inc.
    Inventors: Patrick Stanley Riehl, Vladimir A. Muratov
  • Patent number: 10199881
    Abstract: An apparatus and method for performing foreign object detection for a wireless power transmitter. A matching network and transmit coil are energized, and a resonance is excited. The resonance is allowed to decay. A temporal characteristic of the decay is measured. The temporal characteristic is analyzed to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: February 5, 2019
    Assignee: MediaTek Inc.
    Inventors: Vladimir A. Muratov, Patrick Stanley Riehl, William Plumb
  • Patent number: 10193390
    Abstract: Apparatus and methods for configuring power settings of a wireless power transmitter installed adjacent to a partition are described. A wireless power receiver may detect an amount of power transmitted through the partition from the power transmitter, and identify at least one power setting to the power transmitter that produces an acceptable level of wirelessly transferred power at the wireless power receiver. The power transmitter may store an identified power setting and subsequently operate at the setting identified by the wireless power receiver to provide wireless power through the partition for powering or charging a wirelessly powered device. By configuring a wireless power transmitter at an installation site, various partition thicknesses may be accommodated for through-table, wireless power transfer, for example.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: January 29, 2019
    Assignee: MediaTek Inc.
    Inventor: Patrick Stanley Riehl
  • 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
  • Patent number: 10177602
    Abstract: A synchronous rectifier using only n-channel devices in which the low-side switches are effectively cross-coupled using low-side comparators and the high-side switches perform an accurate zero-voltage-switching (ZVS) comparison. The charging path of each bootstrap domain is completed through the low-side switches, which are each always on for every half-cycle independent of loading. This scheme gives rectifier efficiency gain because a) each bootstrap domain receives maximum charging time, and b) the charging occurs through a switch rather than a diode. Both these factors ensure the bootstrap domain is fully charged, thereby reducing conduction losses through the rectifier switches. Furthermore, settings may be adjusted by software to optimize the resistive and capacitive losses of the rectifier. Using data for die temperature and operating frequency, software can create a feedback loop, dynamically adjusting rectifier settings in order to achieve the best possible efficiency.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: January 8, 2019
    Assignee: Mediatek Singapore PTE, Ltd.
    Inventors: Hasnain Akram, Yung-Chih Yen, Patrick Stanley Riehl, Anand Satyamoorthy
  • Publication number: 20180352875
    Abstract: Techniques for wirelessly charging smart textiles, such as smart garments, are provided. Aspects of the present application provide a smart garment device with an array of integrated coils and rectifiers that enable wireless charging of the device from a drawer or other enclosure that produces a roughly uniform AC magnetic field. The smart garment can draw power from the magnetic field once placed within the enclosure, regardless of how the garment is placed in the enclosure. The method can be applied to garments of any shape, and multiple garments can be charged simultaneously by placing the multiple garments into the same magnetic field.
    Type: Application
    Filed: June 11, 2018
    Publication date: December 13, 2018
    Applicant: Analog Devices, Inc.
    Inventor: Patrick Stanley Riehl
  • Patent number: 10135305
    Abstract: Some embodiments relate to a multi-mode wireless power transmitter. The transmitter includes an inverter configured to produce at its output a first signal having a first frequency or a second signal having a second frequency. The transmitter also includes a first transmit coil coupled to the output of the inverter and configured to wirelessly transmit power at the first frequency. The transmitter also includes a second transmit coil coupled to the output of the inverter and configured to wirelessly transmit power at the second frequency. The transmitter further includes at least one matching network coupled to the first transmit coil, the second transmit coil, and the output of the inverter. The at least one matching network is configured to provide power to the first transmit coil in response to the first signal and inhibit providing power to the second transmit coil in response to the first signal.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: November 20, 2018
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: Vladimir A. Muratov, Patrick Stanley Riehl
  • Patent number: 10084345
    Abstract: A resonant wireless power (RWP) system is provided that includes a signal generator that provides an input signal waveform. An amplifier structure amplifies signals for transmissions to a receiver that is powered from a fixed DC voltage supply. The amplifier structure is operated either using differential or single-ended amplifiers to provide two different output power levels, in burst mode to provide a range of output power levels, or using a capacitor in a matching network that is adjusted to provide a range of output power levels.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: September 25, 2018
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: Patrick Stanley Riehl, Anand Satyamoorthy, Yung-Chih Yen
  • Patent number: 10014724
    Abstract: A resonant wireless power (RWP) receiver is provided that includes an inductor element that couples with a resonant wireless power source. A capacitor arrangement is coupled to the inductor element altering the open-circuit impedance of the RWP receiver to reduce the ac voltage under certain defined situations. The capacitor arrangement includes a plurality capacitors tuned to a control ac voltage in the RWP receiver.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 3, 2018
    Assignee: MEDIATEK Singapore Pte. Ltd.
    Inventors: Patrick Stanley Riehl, Anand Satyamoorthy, Hasnain Akram