Xu U Zhu

US Patent:

7332980, Feb 19, 2008

Filed:

Sep 22, 2005

Appl. No.:

11/232663

Inventors:

Xu Zhu - Allen TX, US
Mike Brobston - Allen TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H03H 7/40

US Classification:

333 173, 333 32

Abstract:

The present disclosure relates generally to digitally tunable impedance matching networks. In one example, a digitally tunable impedance matching network is configured to produce an overall reactance value of approximately X, and includes multiple reactive components that are configured to produce a reactance value in the range of approximately zero to X with a minimum resolution of approximately X/2.

US Patent:

7671693, Mar 2, 2010

Filed:

Apr 14, 2006

Appl. No.:

11/404734

Inventors:

Michael Brobston - Allen TX, US
Xu Zhu - Plano TX, US
Seong Eun Kim - Plano TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H03H 7/38

US Classification:

333 173, 333 32

Abstract:

The present disclosure relates generally to tunable impedance matching networks and methods for the use of such networks. In one example, a method includes identifying state information about a mobile device, accessing a memory to identify a configuration of an impedance matching network based on the state information, and applying the values from the configuration to the impedance matching network.

US Patent:

7714691, May 11, 2010

Filed:

Jan 5, 2006

Appl. No.:

11/325936

Inventors:

Xu Zhu - Allen TX, US
Michael L. Brobston - Allen TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H01H 61/00
H02N 10/00

US Classification:

337 14, 337 2, 337 3, 337 53, 257415, 335 78, 335 80, 335141, 335144, 200181, 310307

Abstract:

A lockable MEMS switching architecture provided having a clutch assembly, a switching member, and an actuator. The clutch assembly has one or more engagement features located in proximity to the switching member—particularly one or more receiving features located upon the switching member. The clutch assembly is actuated to disengage the engagement features from the receiving features. The switching member is actuated to move in relation to the clutch assembly. Once the switching member is in a desired position, the clutch assembly is de-actuated, causing the engagement features to re-engage with the switching member, thereby restricting its further movement.

US Patent:

8026773, Sep 27, 2011

Filed:

Feb 19, 2008

Appl. No.:

12/070553

Inventors:

Xu Zhu - Allen TX, US
Michael Brobston - Allen TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H03H 7/38

US Classification:

333 32

Abstract:

The present disclosure relates generally to digitally tunable impedance matching networks. In one example, a digitally tunable impedance matching network is configured to produce an overall reactance value of approximately X, and includes multiple reactive components that are configured to produce a reactance value in the range of approximately zero to X with a minimum resolution of approximately X/2.

US Patent:

8160275, Apr 17, 2012

Filed:

Oct 16, 2008

Appl. No.:

12/288030

Inventors:

Xu Zhu - Allen TX, US
Michael L. Brobston - Allen TX, US
Lup M. Loh - Plano TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H03G 3/00

US Classification:

381104, 381120, 381311, 330 3, 330150, 330302, 330305, 455280, 455292

Abstract:

An apparatus and method for amplifying a transmission signals in multiple modes and multiple bands. The apparatus includes a tunable power amplifying module adapted to receive a plurality of signal types comprising multiple modes and multiple bands. The tunable power amplifying module includes a first and second power amplifier stages and a number of tunable matching networks configured to optimize an impedance value based on the mode and band of the signal to be amplified.

US Patent:

20120051409, Mar 1, 2012

Filed:

Aug 22, 2011

Appl. No.:

13/214892

Inventors:

Michael L. Brobston - Allen TX, US
Xu Zhu - Allen TX, US
Au Duy Bui - Dallas TX, US
George Z. Hutcheson - Richardson TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H03H 7/38
H04B 1/38

US Classification:

375222, 333124, 375219

Abstract:

An apparatus and method manage impedance values in a radio in a wireless network. The apparatus includes a tunable matching network (TMN) positioned on a path between a transceiver and an antenna. The TMN includes a plurality of immittance elements. A voltage standing wave ratio (VSWR) detector is configured to detect a ratio of a signal passing the VSWR detector and a signal reflected from the TMN. A control circuit is configured to identify an operating setting for the radio, set a number of the immittance elements based on the operating setting, monitor the ratio detected by the VSWR detector, and modify a setting of at least one of the immittance elements based on the ratio detected.

US Patent:

20120056677, Mar 8, 2012

Filed:

Aug 26, 2011

Appl. No.:

13/219231

Inventors:

Xu Zhu - Allen TX, US
Michael Brobston - Allen TX, US
Lup M. Loh - Plano TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H03F 3/04
H03F 3/19
H03G 3/20

US Classification:

330296, 330127

Abstract:

An apparatus and method amplify a signal for use in a wireless network. The apparatus includes a power amplifier, an envelope modulator, a tunable matching network (TMN), and a controller. The power amplifier outputs the signal at an output power. The envelope modulator controls a bias setting for the power amplifier. The TMN includes a plurality of immittance elements. The controller is operably connected the envelope modulator and the TMN. The controller identifies a desired value for the output power of the power amplifier, controls the output power of the power amplifier by modifying the bias setting of the power amplifier, and sets a number of the plurality of immittance elements based on the bias setting of the power amplifier.

US Patent:

20120200352, Aug 9, 2012

Filed:

Apr 16, 2012

Appl. No.:

13/448200

Inventors:

Xu Zhu - Allen TX, US
Michael L. Brobston - Allen TX, US
Lup M. Loh - Plano TX, US

Assignee:

Samsung Electronics Co., Ltd. - Suwon-si

International Classification:

H03F 1/56
H03F 1/34

US Classification:

330105, 330144

Abstract:

An apparatus and method for amplifying a transmission signals in multiple modes and multiple bands. The apparatus includes a tunable power amplifying module adapted to receive a plurality of signal types comprising multiple modes and multiple bands. The tunable power amplifying module includes a first and second power amplifier stages and a number of tunable matching networks configured to optimize an impedance value based on the mode and band of the signal to be amplified.