Thomas T Liu

6363033, Mar 26, 2002

Aug 28, 2000

09/649813

Christopher R. Cole - Cupertino CA
Albert Gee - Los Altos CA
Thomas Liu - Stanford CA

Acuson Corporation - Mountain View CA

G03B 4206

367138

A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channels respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values, For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels. Waveform parameters can be specified to the transmitters by an external central control system which is responsible for higher level flexibility, such as scan formats, focusing depths and fields of view. The transmit pulse delay specified per-channel to each transmitter is applied in at least two components: a focusing time delay component and a focusing phase component.

20120154222, Jun 21, 2012

Dec 17, 2010

12/971444

Sung-Hoon Oh - Cupertino CA, US
Thomas Liu - Sunnyvale CA, US
Thorsten Hertel - San Jose CA, US

PALM, INC. - SUNNYVALE CA

H01Q 1/24
H01Q 1/38

343702, 343700 MS

Various embodiments of an antenna structure for mobile devices are described. In one or more embodiments a multi-band antenna includes a grounded parasitic element. In some embodiments, a high band arm is provided, and is fed off-center, so that the resonating arms are not symmetrical in length. In some embodiments, a coupled ground resonator is included to add a differential resonating mode. A ground leg may be included to offer facilitate impedance and inductance matching. The combination of these structures creates four distinct resonance modes for the high band, which creases a wide effective bandwidth for the disclosed antenna. Other embodiments are described and claimed.

20120169547, Jul 5, 2012

Jan 3, 2011

12/983665

Sung-Hoon Oh - Cupertino CA, US
Thomas Liu - Sunnyvale CA, US
Thorsten Hertel - San Jose CA, US
Joselito Gavilan - Sunnyvale CA, US

PALM, INC. - Sunnyvale CA

H01Q 1/24

343702

Various embodiments of an antenna structure for mobile devices are described. In one or more embodiments a multi-band antenna includes a multi-band antenna with a conductive cosmetic feature operating as a resonating element. In some embodiments, an antenna includes a folded monopole element, a loop element formed between a portion of the conductive cosmetic feature and the printed circuit board and an L-shaped slot antenna element defined in part by a side surface of the conductive cosmetic feature. In some embodiments the folded monopole element, the loop element, and the slot antenna element are capable of resonating in response to a signal applied to the folded monopole element. Other embodiments are described and claimed.

20120169568, Jul 5, 2012

Jan 3, 2011

12/983695

Sung-Hoon Oh - Cupertino CA, US
Thomas Liu - Sunnyvale CA, US
Thorsten Hertel - San Jose CA, US

PALM, INC. - Sunnyvale CA

H01Q 21/30

343893

Various embodiments of an antenna structure for mobile devices are described. In one or more embodiments a multi-band antenna includes first, second and third resonating elements. The first and second resonating elements may each have an L-shape, and may be fed by a single feed leg. The third resonating element may be coupled to ground. In some embodiments, the first resonating element may be longer than the second resonating element, and the third resonating element may be positioned adjacent to the first resonating element. In other embodiments, a tuning element is coupled to the signal feed and is positioned adjacent to the second resonating element. The tuning element may have a geometry that is similar to a geometry of the second resonating element. The combination of these structures creates a plurality of distinct resonance modes which creases a wide effective bandwidth for the disclosed antenna. Other embodiments are described and claimed.

46851232, Aug 4, 1987

Sep 13, 1985

6/775742

Richard Y. Hsia - Holmdel NJ
Thomas C. Liu - Atlantic Highlands NJ

American Telephone and Telegraph Company - New York NY
AT&T Information Systems Inc. - Morristown NJ

H04M 1100

379 93

A communication system includes a plurality of station sets each connected over two pair communication facilities to a control module. An adapter unit switchably connects an external data or voice device via a station set to either facility in response to a control signal from the control module. A data mode is established by sending a data mode request signal from the station set to the control module. An off-hook signal from a connected data device is used to request a data call. The control module signals to which facility the adapter is to connect the data call and outputs a unique visual on the data call facility. The control module prevents other calls from bridging onto or interfering with the data call. The system also permits a voice call on a facility to be converted to a data call on the other facility. Furthermore, a user can make a voice call over one facility while a data call is in progress on the other facility.

61729396, Jan 9, 2001

Oct 12, 1999

9/416965

Christopher R. Cole - Cupertino CA
Albert Gee - Los Altos CA
Thomas Liu - Stanford CA

Acuson Corporation - Mountain View CA

G03B 4206

367138

A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform information representative of the ultimate desired waveform to be applied to one or more corresponding transducer elements for each beam. Each multi-channel transmitter applies beamformation delays and apodization to each channel's respective initial waveform information digitally, digitally modulates the information by a carrier frequency, and interpolates the information to the DAC sample rate for conversion to an analog signal and application to the associated transducer element(s). The beamformer transmitters can be programmed per channel and per beam with carrier frequency, delay, apodization and calibration values. For pulsed wave operation, pulse waveform parameters can be specified to the beamformer transmitters on a per firing basis, without degrading the scan frame rate to non-useful diagnostic levels. Waveform parameters can be specified to the transmitters by an external central control system which is responsible for higher level flexibility, such as scan formats, focusing depths and fields of view.

46463470, Feb 24, 1987

May 2, 1985

6/729955

Thomas C. Liu - Atlantic Highlands NJ

American Telephone and Telegraph Company - New York NY
AT&T Information Systems Inc. - Holmdel NJ

H04M 172

379375

A ringing signal reformatting circuit detects ringing signals having one or more ringing bursts and generates a code representing a modified distinctive ringing signal having a predetermined number of bursts and a predetermined on/off timing in response to all detected ringing signals having the same number of ringing bursts. This coded ring signal is sent to a station set and decoded thereat to generate a distinctive ring signal.

44127316, Nov 1, 1983

Jul 29, 1981

6/287973

Peter E. Herborn - Menlo Park CA
Thomas T. Liu - Sunnyvale CA

NCR Corporation - Dayton OH

G03D 700

354299

An improved diazo film processing and developing system has warm-up and steady state heaters along with gravity loading of the film drive rollers and cast aluminum pre-heat and developing chambers. The chambers use resilient or leaf spring seals and a stainless steel aqueous ammonia separation chamber is contiguous and directly connected with the developing chamber for maintaining a temperature differential between the two chambers.