Qualcomm Incorporated

Other

Qaulcomm Incorporated

Charles E Wheatley, Iii

Roberto Padovani

Edward George Tiedemann, Jr

Paul E Bender

Nagabhushana T Sindhushayana

Peter J Black

Matthew Stuart Grob

Klein S Gilhousen

Jurg K Hinderling

Lindsay A Weaver, Jr

Joseph P Odenwalder

Zhen Ning Low

Irwin M Jacobs

Andrew J Viterbi

Tao Chen

Francesco Grilli

Serge D Willenegger

Parvathanathan Subrahmanya

Richard K Kornfeld

Fuyun Ling

Stein Arne Lundby

Rashid Ahmed Attar

Jack M Holtzman

Ephraim Zehavi

William H Von Novak

Richard Finch Dean

Sergio P Estrada

Ahmad Jalali

Jeffrey Alexander Levin

Keith William Saints

Bruce A Judson

Katherine W White

Mark S Wallace

Steven J Howard

Stanley Slavko Toncich

William Henry Von Novak, Iii

Franklin Peter Antonio

Leonid Razoumov

Eduardo A S Esteves

Paul E Peterzell

Russell John Fagg

John E Maloney

Ana L Weiland

Mitsunari Okazaki

Adam A Mudrick

Tohru Izumiyama

Derek N Punch

J Michael Price

Tsuyoshi Kitamura

Keith L Adkins

J Rod Walton

Avneesh Agrawal

Sharad Deepak Sambhwani

Leonid Sheynblat

Danlu Zhang

Ernest Tadashi Ozaki

James A Hutchison, Iv

Rajeev Krishnamurthi

Raymond Curtis Wallace

Kenneth Robert Baker

Gilbert Leung

Richard J Camarillo

Robert D Blakeney, Ii

Lu Yuan

Mehraban Iraninejad

Mei-Li Chi

Randy Standke

Daniel James Willis

Edward George Tiedemann

Chris P Wieck

Exemplary embodiments are directed to a device include a parasitic coil for protection of the device. A device may include a first circuit configured to receive a first transmitted signal at an operational frequency. The device may also include a second circuit a second circuit configured to generate a field that opposes at least one of an undesirable portion of a wireless power field of the first transmitted signal and a portion of another wireless power field proximate the first circuit, the another wireless power field generated by a second transmitted signal at a non-operational frequency of the first circuit.

Parasitic circuit for device protection

This disclosure provides systems, methods and apparatus for reducing harmonic emissions. One aspect of the disclosure provides a transmitter apparatus. The transmitter apparatus includes a driver circuit characterized by an efficiency and a power output level. The driver circuit further includes a filter circuit electrically connected to the driver circuit and configured to modify the impedance of the transmit circuit to maintain the efficiency of the driver circuit at a level that is within 20% of a maximum efficiency of the driver circuit when the impedance is within the complex impedance range. The filter circuit is further configured to maintain a substantially constant power output level irrespective of the reactive variations within the complex impedance range. The filter circuit is further configured to maintain a substantially linear relationship between the power output level and the resistive variations within the impedance range.

Impedance transformation network for improved driver circuit performance

Exemplary embodiments are directed to controlling impedance. A wireless power transmitter for controlling impedance comprises a transmit circuit configured to wirelessly transmit power to a plurality of receivers, each having a load resistance, within a charging region of the transmit circuit. The transmitter also comprises a controller configured to request each receiver of the plurality of receivers to adjust its load resistance to a value that achieves a target total impedance as presented to the controller.

Wireless power distribution among a plurality of receivers

This invention describes a method and apparatus to cancel the mutual inductance between mutually coupled transmit coils, each of the transmit coils fed by individual power amplifiers, and the transmit coils all sharing a common ground with the power amplifiers. The methods and systems disclosed consist of coupling the return legs of each transmit coil to a mutual inductance cancellation circuit near a common ground return connection. The cancellation circuit uses a combination of inductors and capacitors to bridge various combinations of the transmit coils without physically connecting the 'bridged' transmit coils. Transmit coils 'bridged' using inductors have positive mutual inductance added to them, while transmit coils &#x201c;bridged&#x201d; using capacitors have negative mutual inductance added to them. Additionally, manipulation of the transmit coil overlap of overlapping transmit coils and/or manipulation of the location of the cancellation circuit can be used finely tune the mutual inductance between the transmit coils.

Wireless power multi-coil mutual induction cancellation methods and apparatus

An apparatus comprises a first driver circuit having a first output impedance while driving a plurality of couplers with a first current having a first phase to generate a wireless field. A second driver circuit drives the plurality of couplers with a second current having a second phase. A controller causes the second driver circuit to sequentially drive each of the plurality of couplers with the second current while causing the first driver circuit to simultaneously drive the other couplers with the first current. The controller identifies a subset of the plurality of couplers based on detecting a change from the first output impedance in response to each of the plurality of couplers being sequentially driven with the second current. The controller selectively energizes the subset of the plurality of couplers via one or both of the first and second driver circuits to wirelessly transfer the charging power.

Method and apparatus for wireless power transfer utilizing transmit coils driven by phase-shifted currents

Exemplary embodiments are directed to resonant frequency tuning. A device includes a transmit coil for transmitting wireless power. The device further includes a transmit element configured to selectively modify a resonant frequency of the transmitter by at least one of inserting the transmit element into the transmit coil or inductively coupling the transmit element to the transmit coil.

Resonance detection and control within a wireless power system

Exemplary embodiments are directed to control of field distribution of a wireless power transmitter. A transmitter may include a transmit antenna configured to generate a field. The transmitter may further include least one parasitic antenna proximate the transmit antenna and configured to modify a distribution of the generated field.

Controlling field distribution of a wireless power transmitter

This disclosure is directed to a repeater () of a wireless communication system () that includes a positioning unit (), such as a GPS receiver, in order to calculate the location of the repeater (). In addition, various techniques are described that exploit the positioning information generated by the repeater () in order to improve the wireless communication system ().

Repeater with positioning capabilities

In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.

Method and apparatus for high rate packet data transmission

Exemplary embodiments are directed to power distribution among a plurality of receivers. A method may include requesting at least one receiver of a plurality of receivers within a charging region of a transmitter to modify an associated load resistance to achieve a desired power distribution among the plurality of receivers. The method may further include requesting each receiver of the plurality of receivers to modify an associated load resistance to achieve a desired total impedance as seen by the transmitter while maintaining the desired power distribution among the plurality of receivers.

Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).

Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system

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Del Mar, CA, United States of America

Charles E Wheatley, Iii