Patents by Inventor Stephen C. Terry
Stephen C. Terry 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: 10992177Abstract: A device includes a charge controller to regulate a battery output voltage based on an input voltage and an input current received from a charging circuit. A loop controller monitors the input voltage and the input current to generate a feedback signal to adjust the input voltage to the charge controller.Type: GrantFiled: January 17, 2019Date of Patent: April 27, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Stephen C. Terry, Paul Brohlin
-
Patent number: 10978921Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. During digital ping operations while the transmitting device and receiving device negotiate to establish a power level to use during normal operation, low-power wireless power signals may be transmitted to the receiving device from the wireless power transmitting device. Information gathered during the digital ping may be evaluated using a wireless-power-transmission-efficiency-to-digital-ping-rectifier-output-voltage relationship and using a normal-operation-wireless-power-transmission-efficiency-to-digital-ping-wireless-power-transmission-efficiency relationship to predict a wireless power transmission efficiency that would be experienced if the system were to enter normal operation. Based on this efficiency prediction, the system can issue alerts and can decide whether or not to enter normal operation.Type: GrantFiled: August 14, 2020Date of Patent: April 13, 2021Assignee: Apple Inc.Inventors: Ge Wang, Stephen C. Terry, Wynand Malan, Zachary S. Harris
-
Patent number: 10938307Abstract: This disclosure describes a system and a method to limit (i.e., regulate) the input power of a power converter as a function of the voltage and/or loading condition of a power-limited source such as a battery. In some embodiments, the power converter may comprise a transconductance amplifier that may produce a sink current to a current mirror, which in turn that may provide an adjusted current limit threshold to the power converter. The power converter may utilize the current limit threshold to perform cycle-by-cycle current limiting, thus regulating the input power drawn from the battery.Type: GrantFiled: September 4, 2018Date of Patent: March 2, 2021Assignee: Apple Inc.Inventors: Yongxuan Hu, Weiyun Chen, Stephen C. Terry, Chi Kin Ho, Norah E. Nakibuuka
-
Publication number: 20200328630Abstract: A wireless power receiving device has a coil that receives wireless power signals from a wireless power transmitting device and has a rectifier that produces direct-current power across rectifier output terminals using the received wireless power signals. A load in the wireless power receiving device receives a direct-current output voltage from the rectifier output terminals. In-band communications are supported in which an amplitude-shift keying communications scheme or other communications scheme is used by a data transmitter in the wireless power receiving device to transmit in-band data through the coil. In-band data is transmitted by modulating one or more transistors that are coupled to the coil and other wireless power receiving circuitry in series with one or more capacitors and is transmitted by modulating current flow through a ballast transistor or other adjustable load that is coupled across the rectifier output terminals.Type: ApplicationFiled: January 21, 2020Publication date: October 15, 2020Inventors: Weiyun Chen, Stephen C. Terry
-
Publication number: 20200227935Abstract: A battery case has first and second coils on opposing sides of a battery and has switching circuitry that is coupled between the first and second coils. The battery case has a battery that provides supplemental battery power wirelessly to a wireless power receiving device via the second coil when the switching circuitry is in an open state. The case can also receive power wirelessly with the first coil from a wireless charging mat when the switching circuitry is in the open state. In a closed state, the switching circuitry shorts the first and second coils together so that current flowing through the first coil flows through the second coil in series and so that wireless power from the wireless charging mat that is received with the first coil is transmitted wirelessly to the wireless power receiving device using the second coil.Type: ApplicationFiled: May 28, 2019Publication date: July 16, 2020Inventors: Narendra S. Mehta, Stephen C. Terry, Rohan Dayal
-
Patent number: 10682498Abstract: Pressure sensors and associated structures that may have reduced light sensitivity. An example may provide structures reducing light at a component on a membrane of a pressure sensor.Type: GrantFiled: October 16, 2017Date of Patent: June 16, 2020Assignee: SILICON MICROSTRUCTURES, INC.Inventors: Holger Doering, Stephen C. Terry, Justin Gaynor, Omar Abed, Fernando Alfaro
-
Patent number: 10641672Abstract: Pressure sensors and associated structures that may facilitate the use of automated connection processes and tools. An example may provide structures for aligning interconnect wires to pressure sensor bondpads in order to facilitate the use of automated processes and tools.Type: GrantFiled: October 17, 2016Date of Patent: May 5, 2020Assignee: Silicon Microstructures, Inc.Inventors: Holger Doering, Stephen C. Terry, Justin Gaynor, Omar Abed, Fernando Alfaro
-
Publication number: 20190341796Abstract: An electronic device may receive or provide power using bidirectional wired and wireless power converters. A bypass path may be included to bypass the battery charger and to allow direct power transfers from a connector of the electronic device to the wireless power converter or from the wireless power converter to the connector of the electronic device. Current limiting and regulation circuitry may also be included.Type: ApplicationFiled: September 7, 2018Publication date: November 7, 2019Applicant: Apple Inc.Inventors: Bin Gu, Yongxuan Hu, Stephen C. Terry, Di Zhao, Ruchi J. Parikh, Michael D. Black, Weiyun Chen
-
Publication number: 20190312459Abstract: A wireless power system has a wireless power transmitting device that uses an inverter to apply alternating-current signals to a coil. In response, the coil generates wireless power signals that are received by a coil in a wireless power receiving circuit of a wireless power receiving device. While wireless power is being transferred to the receiving device, the receiving device communicates with the wireless power transmitting device using in-band communications. The wireless power receiving device can issue a halt-wireless-power-transmission command using in-band communications to direct the wireless power transmitting device to stop transmitting wireless power. When power is not being transferred, the wireless power transmitting device transmits a series of short impulses that are monitored by the receiving device. The receiving device can direct the transmitting device to resume power transmission by adjusting an adjustable impedance circuit coupled to the wireless power receiving circuit.Type: ApplicationFiled: July 31, 2018Publication date: October 10, 2019Inventors: Brandon R. Garbus, Daniel Huber, Jason P. Marini, Stephen C. Terry, YiBo Liu
-
Patent number: 10355514Abstract: A wireless power transmitting device may transmit power wirelessly to a wireless power receiving device. The wireless power receiving device may be a portable electronic device with an array of wireless power receiving coils that receive wireless power from wireless power transmitting coils in the wireless power transmitting device. Each receiving coil in the array of wireless power receiving coils may be coupled to a respective rectifier. Control circuitry of the wireless power receiving device may be configured to determine which rectifiers to enable for synchronous rectification. The control circuitry may be configured to enable at least one rectifier based on the alternating-current voltages produced by each coil in the array of receiving coils. The control circuitry may also be configured to enable at least one rectifier based on the output current from each rectifier.Type: GrantFiled: April 11, 2017Date of Patent: July 16, 2019Assignee: Apple Inc.Inventors: Stephen C. Terry, Nilay D. Jani, Bin Gu, Yongxuan Hu
-
Publication number: 20190214850Abstract: A device includes a charge controller to regulate a battery output voltage based on an input voltage and an input current received from a charging circuit. A loop controller monitors the input voltage and the input current to generate a feedback signal to adjust the input voltage to the charge controller.Type: ApplicationFiled: January 17, 2019Publication date: July 11, 2019Inventors: Stephen C. Terry, Paul Brohlin
-
Publication number: 20190190324Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.Type: ApplicationFiled: September 20, 2017Publication date: June 20, 2019Inventors: Chad A. Bossetti, Christopher S. Graham, David W. Ritter, Todd K. Moyer, Steven G. Herbst, Shimon Elkayam, Nileshbhai J. Shah, Stephen C. Terry, Zaki Moussaoui
-
Publication number: 20190074764Abstract: This disclosure describes a system and a method to limit (i.e., regulate) the input power of a power converter as a function of the voltage and/or loading condition of a power-limited source such as a battery. In some embodiments, the power converter may comprise a transconductance amplifier that may produce a sink current to a current mirror, which in turn that may provide an adjusted current limit threshold to the power converter. The power converter may utilize the current limit threshold to perform cycle-by-cycle current limiting, thus regulating the input power drawn from the battery.Type: ApplicationFiled: September 4, 2018Publication date: March 7, 2019Inventors: Yongxuan Hu, Weiyun Chen, Stephen C. Terry, Chi Kin Ho, Norah E. Nakibuuka
-
Patent number: 10224744Abstract: A device includes a charge controller to regulate a battery output voltage based on an input voltage and an input current received from a charging circuit. A loop controller monitors the input voltage and the input current to generate a feedback signal to adjust the input voltage to the charge controller.Type: GrantFiled: April 13, 2016Date of Patent: March 5, 2019Assignee: Texas Instruments IncorporatedInventors: Stephen C. Terry, Paul Brohlin
-
Publication number: 20190052102Abstract: Disclosed herein are a method, system and non-transitory program storage device for protecting a power converter from overvoltage conditions in wireless power transfer. In some embodiments, the power converter may use a controllable current sink to discharge an output voltage of the power converter's receiver so as to maintain the output voltage below an overvoltage threshold. In some embodiments, a peak current of the current sink may be controlled as a function of the output voltage. In some embodiments, the current sink may be enabled and/or disabled according to a duty cycle and a frequency, wherein the frequency may be maintained beyond an audible range. In some embodiments, the power converter may bypass the receiver responsive to the output voltage exceeding a limit, thus effectively disabling the power transfer from a transmitter to the receiver.Type: ApplicationFiled: December 13, 2017Publication date: February 14, 2019Inventors: Weiyun Chen, Stephen C. Terry, Yongxuan Hu
-
Patent number: 10041851Abstract: Pressure sensors and their methods of manufacturing, where the pressure sensors have a small, thin form factor and may include features designed to improve manufacturability and where the method of manufacturing may improve yield and reduce overall costs.Type: GrantFiled: August 3, 2016Date of Patent: August 7, 2018Assignee: SILICON MICROSTRUCTURES, INC.Inventors: Holger Doering, Stephen C. Terry, Justin Gaynor, Omar Abed, Fernando Alfaro
-
Publication number: 20180099120Abstract: Pressure sensors and associated structures that may have reduced light sensitivity. An example may provide structures reducing light at a component on a membrane of a pressure sensor.Type: ApplicationFiled: October 16, 2017Publication date: April 12, 2018Applicant: Silicon Microstructures, Inc.Inventors: Holger Doering, Stephen C. Terry, Justin Gaynor, Omar Abed, Fernando Alfaro
-
Publication number: 20180062416Abstract: A wireless power transmitting device may transmit power wirelessly to a wireless power receiving device. The wireless power receiving device may be a portable electronic device with an array of wireless power receiving coils that receive wireless power from wireless power transmitting coils in the wireless power transmitting device. Each receiving coil in the array of wireless power receiving coils may be coupled to a respective rectifier. Control circuitry of the wireless power receiving device may be configured to determine which rectifiers to enable for synchronous rectification. The control circuitry may be configured to enable at least one rectifier based on the alternating-current voltages produced by each coil in the array of receiving coils. The control circuitry may also be configured to enable at least one rectifier based on the output current from each rectifier.Type: ApplicationFiled: April 11, 2017Publication date: March 1, 2018Inventors: Stephen C. Terry, Nilay D. Jani, Bin Gu, Yongxuan Hu
-
Publication number: 20170131167Abstract: Pressure sensors and associated structures that may facilitate the use of automated connection processes and tools. An example may provide structures for aligning interconnect wires to pressure sensor bondpads in order to facilitate the use of automated processes and tools.Type: ApplicationFiled: October 17, 2016Publication date: May 11, 2017Applicant: Silicon Microstructures, Inc.Inventors: Holger Doering, Stephen C. Terry, Justin Gaynor, Omar Abed, Fernando Alfaro
-
Publication number: 20170089788Abstract: Pressure sensors and their methods of manufacturing, where the pressure sensors have a small, thin form factor and may include features designed to improve manufacturability and where the method of manufacturing may improve yield and reduce overall costs.Type: ApplicationFiled: August 3, 2016Publication date: March 30, 2017Applicant: Silicon Microstructures, Inc.Inventors: Holger Doering, Stephen C. Terry, Justin Gaynor, Omar Abed, Fernando Alfaro