Patents by Inventor Johan Strydom
Johan Strydom 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).
-
Publication number: 20240128246Abstract: One example includes an apparatus that includes an insulating layer and an electrically conductive layer on the insulating layer. The conductive layer includes a plurality of electrically isolated and conductive regions. A first switch is on a first of the conductive regions, and the first switch has a first terminal and a second terminal. A second switch is on a second of the conductive regions, and the second switch has a third terminal and fourth terminal. A passive component has a fifth terminal and a sixth terminal. The first and third terminals are coupled to the first conductive region. The fourth and sixth terminals are coupled to the second conductive region. The second and fifth terminals are coupled to a third of the conductive regions.Type: ApplicationFiled: October 14, 2022Publication date: April 18, 2024Inventors: Kwang-Soo KIM, Makoto SHIBUYA, Johan STRYDOM
-
Publication number: 20240072644Abstract: A controller circuit is configured to receive a measurement signal representing a power converter state and receive a control signal representing a power converter resonant period. Based on the power converter state and the power converter resonant period, the controller circuit determines for a switching cycle: a charging interval, a first dead time interval, a discharging interval, and a second dead time interval. The first dead time interval is after the charging interval. The discharging interval is after the first dead time interval. The second dead time interval is after the discharging interval. The controller circuit provides a first drive signal and a second drive signal based on the charging interval, the first dead time interval, the discharging interval, and the second dead time interval.Type: ApplicationFiled: January 31, 2023Publication date: February 29, 2024Inventors: Branko MAJMUNOVIC, Johan STRYDOM, Brent MCDONALD
-
Publication number: 20230122886Abstract: In one example, a controller circuit is configured to: receive a first measurement signal representing a power converter input voltage; receive a second measurement signal representing a power converter output voltage; receive an indication of whether a voltage across a switch is positive during a state change of the switch; based on the first and second measurement signals and the indication, determine: a charging interval; a first dead time interval after the charging interval; a discharging interval; and a second dead time interval after the discharging interval; and provide a first control signal at the first control output, and provide a second control signal at the second control output, in which the states of the first and second control signals vary across the charging interval, the first and second dead time intervals, and the discharging the interval.Type: ApplicationFiled: March 23, 2022Publication date: April 20, 2023Inventors: Yang Jiao, Johan Strydom
-
Patent number: 11621708Abstract: A startup circuit adapted to be coupled to an input voltage supply and operable to supply an output voltage at an output terminal, the startup circuit including: a first transistor having a first control terminal, a first current terminal and a second current terminal, the first current terminal adapted to be coupled to the input voltage supply and the second current terminal coupled to the output terminal; a precharge circuit having a first terminal, a second terminal and a third terminal, the second terminal adapted to be coupled to the input voltage supply and the third terminal coupled to the first control terminal; a current limiter coupled to the precharge circuit, the first control terminal and the second current terminal; a second transistor having a second control terminal, a third current terminal and a fourth current terminal, the third current terminal coupled to the precharge circuit and the second control terminal adapted to be coupled to a control signal; and a third transistor having a third cType: GrantFiled: May 7, 2021Date of Patent: April 4, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael Lueders, Johan Strydom, Cetin Kaya, Maik Peter Kaufmann
-
Publication number: 20230038798Abstract: Described embodiments include a rectifier circuit comprising a first resistor with first and second resistor terminals, and a second resistor with third and fourth resistor terminals. The first and third resistor terminals are coupled to an auxiliary power terminal. A current source is coupled between the second resistor terminal and a ground terminal. An amplifier has a first amplifier input coupled to the second resistor terminal, and a second amplifier input coupled to the fourth resistor terminal. A first transistor is coupled between the fourth resistor terminal and a damping terminal, and has a first control terminal coupled to the first amplifier output. A gate drive circuit has an input coupled to the damping terminal. A second transistor is coupled between the damping terminal and a bootstrap supply terminal, and has a second control terminal coupled to an output of the gate drive circuit.Type: ApplicationFiled: July 26, 2022Publication date: February 9, 2023Inventors: Michael Lueders, Cetin Kaya, Johan Strydom, Paul Brohlin
-
Patent number: 11429928Abstract: This invention relates to a natural resource and reserve management system, a corresponding method and a resultant natural asset inventory. The system has means for amalgamating and integrating data from disparate expert technical systems and applications, including computer developed or generated data, into at least one common, spatially-referenced database for use by at least one commercially available inventory management application, in order to provide integrated natural asset management in a natural resource inventory. The natural resources and reserves may comprise of depletable mineral resources and reserves, the amalgamation and integration may be conducted continually, and the data may be from disparate expert technical systems and applications in order to provide integrated mineral asset management in a mineral resource inventory.Type: GrantFiled: November 13, 2019Date of Patent: August 30, 2022Assignee: MINERP IP INCORPORATEDInventors: John Francis Megannon, Andries George Hendrik Loubser, Michael Woodhall, Edmund Johan Strydom, Alastair Stuart MacFarlane
-
Patent number: 11171570Abstract: Methods, systems, and apparatus to facilitate high side control of a switching power converter are disclosed. An example apparatus includes a latch including a first node coupled to a first source of a first switch and an output coupled to a first gate of the first switch; a first diode coupled to the first node and a second node; a second diode coupled to the second node and ground; a second switch coupled to a voltage source and the second node; and a third switch including a third gate coupled to the second switch, a third source coupled to the second node, and a third drain coupled to the latch.Type: GrantFiled: January 14, 2020Date of Patent: November 9, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Cetin Kaya, Paul Brohlin, Michael Lueders, Johan Strydom
-
Publication number: 20210265992Abstract: A startup circuit adapted to be coupled to an input voltage supply and operable to supply an output voltage at an output terminal, the startup circuit including: a first transistor having a first control terminal, a first current terminal and a second current terminal, the first current terminal adapted to be coupled to the input voltage supply and the second current terminal coupled to the output terminal; a precharge circuit having a first terminal, a second terminal and a third terminal, the second terminal adapted to be coupled to the input voltage supply and the third terminal coupled to the first control terminal; a current limiter coupled to the precharge circuit, the first control terminal and the second current terminal; a second transistor having a second control terminal, a third current terminal and a fourth current terminal, the third current terminal coupled to the precharge circuit and the second control terminal adapted to be coupled to a control signal; and a third transistor having a third cType: ApplicationFiled: May 7, 2021Publication date: August 26, 2021Inventors: Michael Lueders, Johan Strydom, Cetin Kaya, Maik Peter Kaufmann
-
Patent number: 11031933Abstract: A startup circuit includes an enhancement mode transistor with a drain coupled to a startup circuit input, a source coupled to a first node, and a gate coupled to a second node. The startup circuit includes a current limiting circuit that controls a current path between the second node and a startup circuit output node based on a current sense voltage signal representing a current through the enhancement mode transistor, and a voltage regulation circuit controls a voltage of the second node to regulate a startup circuit output voltage of the startup circuit output node.Type: GrantFiled: December 31, 2019Date of Patent: June 8, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael Lueders, Johan Strydom, Cetin Kaya, Maik Peter Kaufmann
-
Patent number: 11004942Abstract: In some examples, a system comprises a bi-directional gallium nitride (GaN) device including first and second switches and a substrate, the first switch including a first gate and a first source, the second switch including a second gate and a second source, and the substrate shared between the first and second switches. The system include a third switch coupled to the first source and the substrate. The system includes a fourth switch coupled to the second source and the substrate and a comparator having inputs coupled to the first and second sources and outputs coupled to the third and fourth switches.Type: GrantFiled: December 30, 2017Date of Patent: May 11, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael Lueders, Johan Strydom
-
Publication number: 20200274530Abstract: A startup circuit includes an enhancement mode transistor with a drain coupled to a startup circuit input, a source coupled to a first node, and a gate coupled to a second node. The startup circuit includes a current limiting circuit that controls a current path between the second node and a startup circuit output node based on a current sense voltage signal representing a current through the enhancement mode transistor, and a voltage regulation circuit controls a voltage of the second node to regulate a startup circuit output voltage of the startup circuit output node.Type: ApplicationFiled: December 31, 2019Publication date: August 27, 2020Inventors: Michael Lueders, Johan Strydom, Cetin Kaya, Maik Peter Kaufmann
-
Publication number: 20200153343Abstract: Methods, systems, and apparatus to facilitate high side control of a switching power converter are disclosed. An example apparatus includes a latch including a first node coupled to a first source of a first switch and an output coupled to a first gate of the first switch; a first diode coupled to the first node and a second node; a second diode coupled to the second node and ground; a second switch coupled to a voltage source and the second node; and a third switch including a third gate coupled to the second switch, a third source coupled to the second node, and a third drain coupled to the latch.Type: ApplicationFiled: January 14, 2020Publication date: May 14, 2020Inventors: Cetin Kaya, Paul Brohlin, Michael Lueders, Johan Strydom
-
Publication number: 20200082329Abstract: This invention relates to a natural resource and reserve management system, a corresponding method and a resultant natural asset inventory. The system has means for amalgamating and integrating data from disparate expert technical systems and applications, including computer developed or generated data, into at least one common, spatially-referenced database for use by at least one commercially available inventory management application, in order to provide integrated natural asset management in a natural resource inventory. The natural resources and reserves may comprise of depletable mineral resources and reserves, the amalgamation and integration may be conducted continually, and the data may be from disparate expert technical systems and applications in order to provide integrated mineral asset management in a mineral resource inventory.Type: ApplicationFiled: November 13, 2019Publication date: March 12, 2020Inventors: John Francis Megannon, Andries George Hendrik Loubser, Michael Woodhall, Edmund Johan STRYDOM, Alastair Stuart MacFarlane
-
Publication number: 20200076312Abstract: Methods, systems, and apparatus to facilitate high side control of a switching power converter are disclosed. An example apparatus includes a latch including a first node coupled to a first source of a first switch and an output coupled to a first gate of the first switch; a first diode coupled to the first node and a second node; a second diode coupled to the second node and ground; a second switch coupled to a voltage source and the second node; and a third switch including a third gate coupled to the second switch, a third source coupled to the second node, and a third drain coupled to the latch.Type: ApplicationFiled: May 14, 2019Publication date: March 5, 2020Inventors: Cetin Kaya, Paul Brohlin, Michael Lueders, Johan Strydom
-
Patent number: 10581335Abstract: Methods, systems, and apparatus to facilitate high side control of a switching power converter are disclosed. An example apparatus includes a latch including a first node coupled to a first source of a first switch and an output coupled to a first gate of the first switch; a first diode coupled to the first node and a second node; a second diode coupled to the second node and ground; a second switch coupled to a voltage source and the second node; and a third switch including a third gate coupled to the second switch, a third source coupled to the second node, and a third drain coupled to the latch.Type: GrantFiled: May 14, 2019Date of Patent: March 3, 2020Assignee: Texas Instruments IncorporatedInventors: Cetin Kaya, Paul Brohlin, Michael Lueders, Johan Strydom
-
Patent number: 10521763Abstract: This invention relates to a natural resource and reserve management system, a corresponding method and a resultant natural asset inventory. The system has means for amalgamating and integrating data from disparate expert technical systems and applications, including computer developed or generated data, into at least one common, spatially-referenced database for use by at least one commercially available inventory management application, in order to provide integrated natural asset management in a natural resource inventory. The natural resources and reserves may comprise of depletable mineral resources and reserves, the amalgamation and integration may be conducted continually, and the data may be from disparate expert technical systems and applications in order to provide integrated mineral asset management in a mineral resource inventory.Type: GrantFiled: January 22, 2016Date of Patent: December 31, 2019Assignee: MINE RP HOLDINGS (PTY) LIMITEDInventors: John Francis Megannon, Andries George Hendrik Loubser, Michael Woodhall, Edmund Johan Strydom, Alastair Stuart MacFarlane
-
Patent number: 10439503Abstract: Methods, systems, and apparatus to facilitate high side control of a switching power converter are disclosed. An example apparatus includes a latch including a first node coupled to a first source of a first switch and an output coupled to a first gate of the first switch; a first diode coupled to the first node and a second node; a second diode coupled to the second node and ground; a second switch coupled to a voltage source and the second node; and a third switch including a third gate coupled to the second switch, a third source coupled to the second node, and a third drain coupled to the latch.Type: GrantFiled: September 5, 2018Date of Patent: October 8, 2019Assignee: Texas Instruments IncorporatedInventors: Cetin Kaya, Paul Brohlin, Michael Lueders, Johan Strydom
-
Publication number: 20190207590Abstract: In some examples, a system comprises a bi-directional gallium nitride (GaN) device including first and second switches and a substrate, the first switch including a first gate and a first source, the second switch including a second gate and a second source, and the substrate shared between the first and second switches. The system include a third switch coupled to the first source and the substrate. The system includes a fourth switch coupled to the second source and the substrate and a comparator having inputs coupled to the first and second sources and outputs coupled to the third and fourth switches.Type: ApplicationFiled: December 30, 2017Publication date: July 4, 2019Inventors: Michael LUEDERS, Johan STRYDOM
-
Patent number: 9634555Abstract: A power factor correction (PFC) boost circuit. The PFC boost circuit can include a first switching device, a second switching device, a first gate driver coupled to the first switching device, a second gate driver coupled to the second switching device, and a PFC controller configured to control the first and second gate drivers. The PFC controller will utilize a new technique, referred to herein as “predictive diode emulation” to control the switching devices in a desired manner and to overcome inefficiencies and other problems that might arise using traditional diode emulation. The PFC controller is configured to operate in synchronous and non-synchronous modes.Type: GrantFiled: May 30, 2013Date of Patent: April 25, 2017Assignee: Efficient Power Conversion CorporationInventors: Michael A. De Rooij, Johan Strydom
-
Patent number: 9607876Abstract: Circuits, structures and techniques for independently connecting a surrounding material in a part of a semiconductor device to a contact of its respective device. To achieve this, a combination of one or more conductive wells that are electrically isolated in at least one bias polarity are provided.Type: GrantFiled: December 14, 2011Date of Patent: March 28, 2017Assignee: Efficient Power Conversion CorporationInventors: Alexander Lidow, Jianjun Cao, Robert Beach, Johan Strydom, Alana Nakata, Guang Y. Zhao