News Column

Researchers Submit Patent Application, "Gate Drive Circuit for Synchronous Rectification", for Approval

July 16, 2014



By a News Reporter-Staff News Editor at Telecommunications Weekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventor Irish, Linda S. (San Diego, CA), filed on June 17, 2013, was made available online on July 3, 2014.

No assignee for this patent application has been made.

News editors obtained the following quote from the background information supplied by the inventors: "An increasing number and variety of electronic devices are powered via rechargeable batteries. Such devices include mobile phones, portable music players, laptop computers, tablet computers, computer peripheral devices, communication devices (e.g., Bluetooth devices), digital cameras, hearing aids, and the like. While battery technology has improved, battery-powered electronic devices increasingly require and consume greater amounts of power, thereby often requiring recharging. Rechargeable devices are often charged via wired connections through cables or other similar connectors that are physically connected to a power supply. Cables and similar connectors may sometimes be inconvenient or cumbersome and have other drawbacks. Wireless charging systems that are capable of transferring power in free space to be used to charge rechargeable electronic devices or provide power to electronic devices may overcome some of the deficiencies of wired charging solutions. As such, wireless power transfer systems and methods that efficiently and safely transfer power to electronic devices are desirable."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "Various implementations of systems, methods and devices within the scope of the appended claims each have several aspects, no single one of which is solely responsible for the desirable attributes described herein. Without limiting the scope of the appended claims, some prominent features are described herein.

"Details of one or more implementations of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, the drawings, and the claims. Note that the relative dimensions of the following figures may not be drawn to scale.

"One aspect of the subject matter described in the disclosure provides a rectifier circuit for providing direct current (DC) voltage to a load based on at least in part on an alternating current (AC) input from an AC output source having a first and second terminal. The circuit includes a first transistor having a first terminal, a second terminal, and a control terminal. The second terminal of the first transistor is coupled to the second terminal of the AC output source. The circuit further includes a second transistor having a first terminal, a second terminal, and a control terminal. The second terminal of the second transistor is coupled to the first terminal of the AC output source. The control terminal of the first transistor is coupled to the first terminal of the second transistor. The control terminal of the second transistor is coupled to a voltage source. The second transistor is configured to limit a voltage applied to the control terminal of the first transistor.

"Another aspect of the subject matter described in the disclosure provides an implementation of a method for providing direct current (DC) based at least in part on an alternating current from an AC output source. The method includes rectifying the alternating current to the direct current at least in part via a first transistor having a control terminal. The method also includes applying a control voltage with a voltage source to a second transistor having a control terminal. The method further includes limiting an amount of voltage applied to the control terminal of the first transistor via a second transistor.

"Yet another aspect of the subject matter described in the disclosure provides an apparatus for providing direct current (DC) based at least in part on an alternating current from an AC output source. The apparatus includes means for selectively causing current to flow in response to a control voltage. The apparatus further includes means for limiting an amount of the control voltage of the means for selectively causing current to flow. The means for limiting an amount of the control voltage comprises means for selectively providing an open circuit. The means for selectively providing an open circuit comprises a means for providing voltage.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a functional block diagram of an exemplary wireless power transfer system, in accordance with exemplary embodiments of the invention.

"FIG. 2 is a functional block diagram of exemplary components that may be used in the wireless power transfer system of FIG. 1, in accordance with various exemplary embodiments of the invention.

"FIG. 3 is a schematic diagram of a portion of transmit circuitry or receive circuitry of FIG. 2, including a transmit or receive antenna, in accordance with exemplary embodiments of the invention.

"FIG. 4 is a functional block diagram of a transmitter that may be used in the wireless power transfer system of FIG. 1, in accordance with exemplary embodiments of the invention.

"FIG. 5 is a functional block diagram of a receiver that may be used in the wireless power transfer system of FIG. 1, in accordance with exemplary embodiments of the invention.

"FIG. 6 is a schematic diagram of an exemplary full bridge rectifier circuit.

"FIG. 7 is a schematic diagram of an exemplary self-driven synchronous rectifier circuit.

"FIG. 8 is another schematic diagram of an exemplary self-driven synchronous rectifier circuit, in accordance with exemplary embodiments of the invention.

"FIG. 9 is yet another schematic diagram of an exemplary self-driven synchronous rectifier circuit, in accordance with an exemplary embodiment of the invention.

"FIG. 10 is yet another schematic diagram of an exemplary self-driven synchronous rectifier circuit, in accordance with an exemplary embodiment of the invention.

"FIG. 11 is a plot showing exemplary voltage waveforms of the self-driven synchronous rectifier circuit of FIG. 10.

"FIG. 12 is a flow chart of an exemplary method for providing direct current (DC) based at least in part on an alternating current from an AC output source, in accordance with an exemplary embodiment of the invention.

"FIG. 13 is a functional block diagram of an apparatus for providing direct current (DC) based at least in part on an alternating current from an AC output source, in accordance with an exemplary embodiment of the invention.

"The various features illustrated in the drawings may not be drawn to scale. Accordingly, the dimensions of the various features may be arbitrarily expanded or reduced for clarity. In addition, some of the drawings may not depict all of the components of a given system, method or device. Finally, like reference numerals may be used to denote like features throughout the specification and figures."

For additional information on this patent application, see: Irish, Linda S. Gate Drive Circuit for Synchronous Rectification. Filed June 17, 2013 and posted July 3, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4732&p=95&f=G&l=50&d=PG01&S1=20140626.PD.&OS=PD/20140626&RS=PD/20140626

Keywords for this news article include: Patents.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Telecommunications Weekly


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters