Nicholas W Lum

US Patent:

8600316, Dec 3, 2013

Filed:

Apr 5, 2011

Appl. No.:

13/080588

Inventors:

Nicholas W. Lum - Santa Clara CA, US
Ronald W. Dimpflmaier - Los Gatos CA, US
Louie J. Sanguinetti - Los Gatos CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04B 1/44
H04M 1/00

US Classification:

455 78, 4555501, 4555521

Abstract:

An electronic device has wireless communications circuitry including a triplexer. The wireless communications circuitry may be used in first and second modes. In the first mode, the device communicates in a first communications band using a transmitter in a first uplink frequency range associated with the first communications band and using a receiver in a first downlink frequency range associated with the first communications band. In the second mode, the device communicates in a second communications band using a transmitter to transmit in a second uplink frequency range associated with the second communications band and using the receiver to receive in a second downlink frequency range associated with the second communications band. Signals in the two downlink frequency ranges may pass through a common bandpass filter in the triplexer. Two additional bandpass filters in the triplexer may be used to respectively handle the two uplink frequency ranges.

US Patent:

8626101, Jan 7, 2014

Filed:

Aug 18, 2011

Appl. No.:

13/212990

Inventors:

Michael J. Stallman - Redwood City CA, US
Nicholas W. Lum - Santa Clara CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04B 1/06
H04B 7/00
H04B 7/08
H01Q 21/28

US Classification:

4552771, 455272, 455289, 4552772

Abstract:

A wireless electronic device may contain multiple antennas. Control circuitry in the wireless electronic device may adjust antenna switching circuitry so that the device repeatedly cycles through use of each of the antennas. In a device with first and second antennas, the device may repeatedly toggle between the first and second antennas. During each toggling cycle time period, the first antenna may transmit for a fraction of the time period and the second antenna may transmit for a fraction of the time period. The wireless device may control the average power emitted by each antenna by adjusting the fractions of time assigned to each antenna. By performing antenna toggling, the average transmit power produced by each antenna may be reduced while maintaining the average transmit power produced by the device at a desired level.

US Patent:

8208867, Jun 26, 2012

Filed:

Apr 9, 2009

Appl. No.:

12/421178

Inventors:

Nicholas W. Lum - Santa Clara CA, US
Louie J. Sanguinetti - Los Gatos CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04B 1/46

US Classification:

455 78

Abstract:

Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may have antenna diversity circuitry that allows an optimum antenna or optimum antennas in an antenna structure to be switched into use during device operations. The antenna structure may be shared between multiple radio-frequency transceivers in a radio-frequency transceiver circuit. The radio-frequency transceiver circuit may be coupled to the antenna structure using switching and filtering circuitry. The filtering circuitry may include one or more diplexers that divide radio-frequency signals into divided signal paths based on frequency. The filtering circuitry may also include low pass, high pass, and bandpass filters that are interposed in the divided signal paths. Switching circuitry in the switching and filtering circuitry may be used to selectively configure the wireless communications circuitry in transmit and receive modes using multiple communications bands.

US Patent:

20100248799, Sep 30, 2010

Filed:

Mar 26, 2009

Appl. No.:

12/412228

Inventors:

Nicholas W. Lum - Santa Clara CA, US
Louie J. Sanguinetti - Los Gatos CA, US

International Classification:

H04M 1/00

US Classification:

4555757, 4555501

Abstract:

Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may have antenna diversity circuitry that allows an optimum antenna in an antenna structure to be switched into use during device operations. The antenna structure may be shared between multiple radio-frequency transceivers in a radio-frequency transceiver circuit. The radio-frequency transceiver circuit may be coupled to the antenna structure using switching and filtering circuitry. The filtering circuitry may include a diplexer that divides radio-frequency signals into a divided signal path based on frequency. The filtering circuitry may also include bandpass filters that are interposed in each branch of the divided signal path. Switching circuitry in the switching and filtering circuitry may be used to selectively configure the wireless communications circuitry in transmit and receive modes using multiple communications bands.

US Patent:

20110202832, Aug 18, 2011

Filed:

Jan 27, 2011

Appl. No.:

13/015415

Inventors:

Nicholas Lum - Redwood City CA, US

International Classification:

G06F 17/21

US Classification:

715249

Abstract:

Methods, systems, and apparatus, including computer programs encoded on computer storage media for graphically indicating text continuity. One method includes receiving text including a first line of text followed by a second line of text followed by a third line of text and selecting a distinct line beginning and line end of each of the first, second, and third lines of text. The method further includes formatting the text, including setting respective first attribute values for a first appearance attribute, so that, with respect to the first appearance attribute, the text has a continuity of visual appearance from the first line end to the second line beginning, and so that, with respect to the first appearance attribute, no continuity of visual appearance exists from the first line end to either the first line beginning or to the third line beginning, and presenting the formatted text on the output device.

US Patent:

20130016633, Jan 17, 2013

Filed:

Jul 14, 2011

Appl. No.:

13/183413

Inventors:

Nicholas W. Lum - Santa Clara CA, US
Ronald W. Dimpflmaier - Los Gatos CA, US
Louie J. Sanguinetti - Los Gatos CA, US

International Classification:

H04L 5/14
H04B 7/00

US Classification:

370277, 370297

Abstract:

An electronic device has wireless communications circuitry that includes transmitters and receivers. Antenna structures may be coupled to the transmitters and receivers to support radio-frequency signal transmission and radio-frequency signal reception operations. Switching circuitry such may be used to support multiple communications bands of interest. One or more low band receivers may be associated with the first switch and one or more high band receivers may be associated with the second switch. The switches can be configured in real time to switch a desired communications band into use. A diplexer may be used to simultaneously pass low bands to the first receiver and high bands to the second receiver. In this way, a data stream in the low band may be simultaneously received with a data stream in the high band.

US Patent:

20130059546, Mar 7, 2013

Filed:

Sep 6, 2011

Appl. No.:

13/226367

Inventors:

Nicholas W. Lum - Santa Clara CA, US
William J. Noellert - Mountain View CA, US
Ronald W. Dimpflmaier - Lost Gatos CA, US

International Classification:

H04B 1/38

US Classification:

455 73

Abstract:

Electronic devices with wireless communications capabilities are provided. The electronic device may include storage and processing circuitry, power amplifier circuitry, power supply circuitry, etc. The storage and processing circuitry may direct the power amplifier circuitry to operate using a desired power mode, in allocated resource blocks within a particular frequency channel, and at a given output power level. The power supply circuitry may bias the power amplifier circuitry with a power supply voltage. The electronic device may be subject to in-band emissions requirements and adjacent channel leakage requirements that restrict the power levels produced by the device on frequencies that are not allocated to the device. The electronic device may optimize the power amplifier supply voltage based on allocated resource blocks by minimizing the supply voltage to reduce power consumption while ensuring that emissions requirements are satisfied.

US Patent:

20130065541, Mar 14, 2013

Filed:

Sep 8, 2011

Appl. No.:

13/227953

Inventors:

Nicholas W. Lum - Santa Clara CA, US
William J. Noellert - Mountain View CA, US
Ronald W. Dimpflmaier - Los Gatos CA, US

International Classification:

H04B 1/40

US Classification:

455 77

Abstract:

An electronic device may be located in a geographical cell that is served by a base station. The electronic device may communicate with the base station on a frequency band. The frequency band may be subject to adjacent band emissions requirements to help prevent interference with wireless devices that are operating in adjacent frequency bands. The adjacent band emission requirements may vary based on the frequency band used to communicate with the base station, the geographical cell, and/or the presence of public safety radios. To satisfy the adjacent band emissions requirements while minimizing power consumption, the electronic device may receive cell information from the base station and adjust power amplifier linearity based on the received information.