Hua Jin F Wang

D568459, May 6, 2008

Oct 17, 2007

29/290042

Hua Chiang Wang - La Verne CA, US

2304

D23383

7471290, Dec 30, 2008

Nov 18, 2005

11/283489

Hua Wang - Pasadena CA, US
John Hatlestad - Maplewood MN, US
Keith R. Maile - New Brighton MN, US

Cardiac Pacemakers, Inc. - St. Paul MN

G06T 15/00

345419, 607 19, 607 32, 607 60

Methods, systems, and apparatus are described for posture detection. Orientations of a body are detected with respect to first and second axes. A movement of the body with respect to a third axis is also detected. Three-dimensional orientations of the body are determined based on the orientations and the movement. The detected posture may be used for applications such as controlling medical devices and detecting patient disorders.

8274021, Sep 25, 2012

Mar 6, 2009

12/399320

Hua Wang - Pasadena CA, US
Seyed Ali Hajimiri - Pasadena CA, US

California Institute of Technology - Pasadena CA

H05B 1/02

219494, 219497, 219209, 219501

The invention is an integrated temperature regulator that can be fabricated using conventional semiconductor processing technology. The integrated temperature regulator can include a reaction chamber, for example fabricated from PDMS, in which chemical or biochemical reactions of interest can be carried out. The temperature regular can also be used to regulate the temperature of some circuits, e. g. an effective-inductance-change based magnetic particle sensor, to achieve a stable operation performance, such as an improved sensitivity. The integrated temperature regulator includes as subcomponents a temperature sensing circuit that receives a thermal signal from the vicinity of the reaction chamber, a temperature reference circuit, and a temperature control circuit that controls a heater based at least in part on the difference between the sensed temperature and the reference temperature. The various subcomponents can be programmable.

8305106, Nov 6, 2012

Aug 24, 2010

12/806906

Florian Bohn - Pasadena CA, US
Seyed Ali Hajimiri - Pasadena CA, US
Hua Wang - Hillsboro OR, US
Yu-Jiu Wang - Shengang Township, TW

California Institute of Technology - Pasadena CA

G01R 31/02

32476202, 3247503

Systems and methods for providing self-healing integrated circuits. The method is characterized in that the behavior of a circuit or a device in response to an input signal is observed. One or more operational parameters or characteristics of the circuit or the device are derived. A corrective action to bring the operational parameters or characteristics of the circuit or device within a desired range is deduced, if needed. The corrective action can be the application of a correction signal or a modification of one or more parameters or characteristics of an element in the circuit. The calculated corrective action, if needed, is applied to bring the operational parameters or characteristics of the circuit or device within the desired range. Optionally, the operational parameters or characteristics of the circuit or the device after the correction is effectuated can be checked.

8366641, Feb 5, 2013

Nov 18, 2005

11/283490

Hua Wang - Pasadena CA, US
John Hatlestad - Maplewood MN, US

Cardiac Pacemakers, Inc. - St. Paul MN

A61B 5/103
A61B 5/117

600595, 600587

Calibrating a posture detector for a patient's body involves measuring outputs of one or more sensors disposed in relation to the patient's body while the patient assumes a plurality of positions. A transfer matrix is formed having coefficients corresponding to the measured outputs. The transfer matrix defines a relationship between a coordinate system of the one or more sensors and a coordinate system of the patient's body. The body coordinate system is used as a reference coordinate system for posture detection. Posture, including tilt and/or tilt angle, may be determined based on first and second rotational angles defined in relation to the body coordinate system.

8378669, Feb 19, 2013

Sep 15, 2009

12/559517

Hua Wang - Pasadena CA, US
Seyed Ali Hajimiri - Pasadena CA, US

California Institute of Technology - Pasadena CA

G01N 27/72

324228, 324204, 32476201, 32476208, 702117

According to one aspect, an integrated magnetic particle measurement device for detecting a presence or absence of magnetic particles in a sample volume includes at least one sensor cell having a differential sensor pair. An active sensor oscillator frequency is responsive to one or more magnetic particles situated within a sample volume. The sensor cell is configured to be operative in the absence of an externally applied magnetic field. A frequency measurement circuit provides as a time-multiplexed output a first count representative of the active sensor oscillator frequency and a second count representative of the reference sensor oscillator frequency. A calculated difference between the first count and the second count is indicative of a presence or an absence of one or more magnetic particles within the sample volume. An integrated magnetic particle measurement system array and a method for detecting one or more magnetic particles are also described.

8610589, Dec 17, 2013

Feb 22, 2010

12/710334

Hua Wang - Pasadena CA, US
Seyed Ali Hajimiri - Pasadena CA, US
Shouhei Kousai - Kawasaki, JP

California Institute of Technology - Pasadena CA

G08B 21/00
G01R 13/34

340635, 340657, 324 7658

A frequency/timing measurement apparatus includes a reference source having a reference source output terminal. At least one target source has a target source output terminal. The at least one target source is communicatively coupled to the reference source. A frequency timing measurement block has a first input terminal electrically coupled to the reference source output terminal. A second input terminal is electrically coupled to the target source output terminal and at least one output terminal. The frequency timing measurement block is configured to perform a noise shaping technique to reduce measurement error attributable to a phase noise that is correlated between the reference source and the target source, and to provide a reduced correlated noise measurement at the at least one output terminal. A method to reduce correlated noise is also described.

20070040553, Feb 22, 2007

Aug 7, 2006

11/499921

Seyed Hajimiri - Pasadena CA, US
Arjang Hassibi - Pasadena CA, US
Hua Wang - Pasadena CA, US

G01V 3/00
A61B 5/05

324309000, 600410000

Spectral scanning magnetic resonance imaging methods and systems. In preferred methods and systems of the invention, to measure the resonance spectrum of the target object, a plurality of excitation signals in different frequencies and/or waveform shapes are introduced simultaneously to the imaging volume through one or more excitation coils, and the response spectrum is measured also in real-time and/or after excitation. Systems of the invention can be compact and portable, with small magnets providing the deterministic inhomogeneous magnetic field. Preferred embodiments include integrated circuit transmitters and receivers. Preferred systems of the invention are suitable, for example, for point of care medical diagnostics.