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Researchers Submit Patent Application, "High Power Rf Field Effect Transistor Switching Using Dc Biases", for Approval

June 26, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Wheeland, Cody B. (San Diego, CA); Irish, Linda S. (San Diego, CA); Von Novak, III, William H. (San Diego, CA); Mayo, Gabriel Isaac (North Potomac, MD), filed on March 15, 2013, was made available online on June 12, 2014.

The patent's assignee is QUALCOMM Incorporated.

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 inventors' 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 disclosure provides an apparatus for tuning. In one embodiment, the apparatus includes a tuning element and a field effect transistor. The field effect transistor includes a gate, a first terminal contact, and a second terminal contact. In some embodiments, the field effect transistor can electrically engage the tuning element to AC (alternating current) power based on a change of an electrical characteristic of the gate with respect to an electrical characteristic of the first terminal contact. In some embodiments, the first terminal contact is at an alternating current voltage. The apparatus further includes a drain bias circuitry to reduce internal drain source capacitance of a Field Effect Transistor. The apparatus can further include DC blocking capacitors. In one embodiment, the apparatus can also include a gate biasing circuitry configured to adjust the electrical characteristic of the gate with respect to the electrical characteristic of the first terminal contact to drive the field effect transistor. The electrical characteristic can include a bias potential. The tuning element can include a capacitor or an inductor or a combination of both.

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 a portion of transmit circuitry that may be used in the transmit circuitry of FIG. 4.

"FIG. 7 is a schematic diagram of an exemplary tuning circuit that may be used in a wireless power transfer system of FIG. 1, in accordance with exemplary embodiments of the invention.

"FIG. 8 is a schematic diagram of an exemplary tuning circuit that may be used in a wireless power transfer system of FIG. 1, in accordance with exemplary embodiments of the invention.

"FIG. 9 is a schematic diagram of an exemplary tuning circuit that may be used in a wireless power transfer system of FIG. 1, in accordance with exemplary embodiments of the invention.

"FIG. 10 is a schematic diagram of an exemplary tuning circuit that may be used in a wireless power transfer system of FIG. 1, in accordance with exemplary embodiments of the invention.

"FIG. 11 is a schematic diagram of an exemplary tuning circuit that may be used in a wireless power transfer system of FIG. 1, in accordance with exemplary embodiments of the invention.

"FIG. 12 is a flowchart diagram of a method of tuning in a wireless power transfer system, in accordance with exemplary embodiments of the invention.

"FIG. 13 is a functional block diagram of a tuning circuit that may be used in a wireless power transfer system of FIG. 1, in accordance with 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: Wheeland, Cody B.; Irish, Linda S.; Von Novak, III, William H.; Mayo, Gabriel Isaac. High Power Rf Field Effect Transistor Switching Using Dc Biases. Filed March 15, 2013 and posted June 12, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5357&p=108&f=G&l=50&d=PG01&S1=20140605.PD.&OS=PD/20140605&RS=PD/20140605

Keywords for this news article include: QUALCOMM Incorporated.

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Source: Politics & Government Week


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