John J Spears

US Patent:

7777369, Aug 17, 2010

Filed:

Dec 22, 2007

Appl. No.:

12/004864

Inventors:

John Hanford Spears - Johnsburg IL, US
Matthew Russell Greene - Crystal Lake IL, US

Assignee:

AT&T Intellectual Property I, L.P. - Reno NV

International Classification:

H02M 3/06
H03J 3/20

US Classification:

307109, 334 78

Abstract:

An embodiment of the present invention provides an apparatus, comprising at least one anti-parallel pair VVC network comprised of two parallel VVCs with one biased in the opposite polarity of the other and at least one anti-series VVC network comprised of two VVCs configured in series, one biased in the opposite polarity of the other such that the resulting AC capacitive variations produce a desired capacitance variation.

US Patent:

8072285, Dec 6, 2011

Filed:

Sep 24, 2008

Appl. No.:

12/236662

Inventors:

John H. Spears - Johnsburg IL, US
Wayne E. Smith - Crystal Lake IL, US
Chenggang Sui - Ellicott City MD, US
Yongfei Zhu - Ellicott City MD, US

Assignee:

Paratek Microwave, Inc. - Nashua NH

International Classification:

H03H 7/38

US Classification:

333 173

Abstract:

Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.

US Patent:

8395459, Mar 12, 2013

Filed:

Feb 29, 2012

Appl. No.:

13/408624

Inventors:

John H. Spears - Johnsburg IL, US
Wayne Smith - Crystal Lake IL, US
Chenggang Sui - Ellicott City MD, US
Yongfei Zhu - Nashua NH, US

Assignee:

Research In Motion RF, Inc. - Wilmington DE

International Classification:

H03H 7/38

US Classification:

333 173

Abstract:

Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.

US Patent:

8421548, Apr 16, 2013

Filed:

Nov 16, 2011

Appl. No.:

13/297951

Inventors:

John H. Spears - Johnsburg IL, US
Wayne E. Smith - Crystal Lake IL, US
Chenggang Sui - Ellicott City MD, US
Yongfei Zhu - Ellicott City MD, US

Assignee:

Research In Motion RF, Inc. - Wilmington DE

International Classification:

H03H 7/38

US Classification:

333 173

Abstract:

Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes.

US Patent:

20110254637, Oct 20, 2011

Filed:

Apr 20, 2011

Appl. No.:

13/090583

Inventors:

Keith Manssen - Bull Valley IL, US
Matthew Greene - Crystal Lake IL, US
Wayne Smith - Crystal Lake IL, US
David Schlueter - Lake Vllla IL, US
John Spears - Johnsburg IL, US

Assignee:

PARATEK MICROWAVE, INC. - Nashua NH

International Classification:

H03H 7/40

US Classification:

333 2, 333 173

Abstract:

A system that incorporates teachings of the present disclosure may include, for example, a matching network including a tunable reactance circuit configured to be coupled to at least one of a transmitter portion and a receiver portion of a communication device, wherein the tunable reactance circuit is adjustable to a plurality of tuning states, and wherein the determination of a tuning state is based on parameters associated with a detected interference. Additional embodiments are disclosed.

US Patent:

20110254638, Oct 20, 2011

Filed:

Apr 20, 2011

Appl. No.:

13/090575

Inventors:

Keith Manssen - Bull Valley IL, US
Matthew Greene - Crystal Lake IL, US
Wayne Smith - Crystal Lake IL, US
David Schlueter - Lake Vllla IL, US
John Spears - Johnsburg IL, US

Assignee:

PARATEK MICROWAVE, INC. - Nashua NH

International Classification:

H01P 5/18
H03H 7/38

US Classification:

333109, 333 173

Abstract:

A system that incorporates teachings of the present disclosure may include, for example, a matching network including a tunable reactance circuit configured to be coupled to at least one of a transmitter portion and a receiver portion of a communication device, where the tunable reactance circuit is adjustable to a plurality of tuning states, and where the determination of a tuning state is based on whether detected signal measurements are determined to be invalid and is based on information from at least one of an open-loop or closed-loop feedback configuration of the tunable reactance circuit. Additional embodiments are disclosed.

US Patent:

20130325149, Dec 5, 2013

Filed:

Jun 1, 2012

Appl. No.:

13/486914

Inventors:

Keith Manssen - Bull Valley IL, US
Carsten Hoirup - Crystal Lake IL, US
Matthew Greene - Crystal Lake IL, US
Simon Andrew Hughes - Waterloo, CA
Steven Mark Morelen - Cary NC, US
Victor Galperin - Waterloo, CA
John Spears - Johnsburg IL, US

Assignee:

PARATEK MICROWAVE, INC. - Wilmington DE

International Classification:

G05B 13/02

US Classification:

700 37

Abstract:

A system that incorporates teachings of the subject disclosure may include, for example, a method for detecting a plurality of use cases of a communication device, determining an initial tuning state for each of a plurality of tuning algorithms according to the plurality of use cases, configuring each of the plurality of tuning algorithms according to their respective initial tuning state, executing a first tuning algorithm of the plurality of tuning algorithms according to an order of execution of the plurality of tuning algorithms, detecting a stability condition of the first tuning algorithm, and executing a second tuning algorithm of the plurality of tuning algorithms responsive to the detected stability condition of the first tuning algorithm. Each tuning algorithms can control one of a tunable reactive element, a control interface, or both of one of a plurality of circuit components of a radio frequency circuit. Other embodiments are disclosed.

US Patent:

55880410, Dec 24, 1996

Filed:

Jan 5, 1995

Appl. No.:

8/369021

Inventors:

George W. Meyer - Buffalo Grove IL
Allen Wong - Streamwood IL
John H. Spears - McHenry IL
David L. Bond - Hoffman Estates IL
Thomas F. Vondrak - Libertyville IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 732

US Classification:

379 59

Abstract:

A cellular speakerphone (100) includes a housing (101) containing a transceiver circuit (203), a processor and switching circuit (205), a coupler (209), and a hands-free user interface (207). The processor and switching circuit (205) and the hands-free user interface (207) operate the cellular speakerphone (100) in a default hands-free mode that is automatically interruptable to permit the cellular speakerphone (100) to operate in a handset mode when an optional handset (127) is operably coupled to the cellular speakerphone (100) via the coupler (209).