Daniel S Chang

US Patent:

6661276, Dec 9, 2003

Filed:

Jul 29, 2002

Appl. No.:

10/209211

Inventors:

Daniel Chang - Fremont CA

Assignee:

Lovoltech Inc. - Santa Clara CA

International Classification:

H03K 17687

US Classification:

327427, 327430

Abstract:

A matching circuit for coupling a conventional metal-oxide semiconductor field effect transistor (MOSFET) driver to the gate of a junction field effect transistor (JFET). A driver circuit optimized for driving a MOSFET is combined with a matching circuit to provide gate drive for a JFET. The matching circuit comprises a resistor and capacitor in parallel. For driving enhancement mode JFETs having a gate grid array structure and a pinch-off voltage greater than 0. 4 volts, the range of resistor values is 10 to 200 ohms, and the range of capacitor values is 1 to 100 nF. For devices having a pinch-off voltage less than 0. 4 volts, the range of resistor values is 100 to 2000 ohms. The matching circuit may further include a diode to provide a bias.

US Patent:

7590681, Sep 15, 2009

Filed:

Aug 7, 2000

Appl. No.:

09/632897

Inventors:

Daniel T. Chang - Belmont CA, US
Jay Raju - Fremont CA, US
Rodric C. Fan - Fremont CA, US
Haiqi Chen - Sunnyvale CA, US
Paul Chen - San Jose CA, US

Assignee:

Trimble Navigation Limited - Sunnyvale CA

International Classification:

G06F 15/16

US Classification:

709203, 709206, 709214, 709228

Abstract:

A method and a system allow presentation of web pages to an internet appliance (e. g. , a hand-held computer, a mobile telephone, or a digital personal assistant) according to user preferences. The user preferences are captured by a management server, which provides a web page customization service in conjunction with a document manager, which parses the web pages to identify information units. The customized web pages are stored in a database using a standardized hypertext document representation device, such as XML. The customized web pages are accessible from a portal adapted for accessing by the internet appliance. In one implementation, the user is also offered pre-configured resources for frequently used services when accessing the portal using the internet device.

US Patent:

7714398, May 11, 2010

Filed:

Mar 27, 2006

Appl. No.:

11/390493

Inventors:

Nadav Ben-Barak - Berkeley CA, US
Daniel M. Chang - Danville CA, US
Jean-Christophe P. Gabriel - Pinole CA, US
Vikram Joshi - Newington CT, US
Joseph Niemann - Fremont CA, US
Alexander Star - Pittsburgh PA, US
Christian Valcke - Orinda CA, US

Assignee:

Nanomix, Inc. - Emeryville CA

International Classification:

G01N 27/414

US Classification:

257414, 600353

Abstract:

A system for measuring an analyte of interest, particularly carbon dioxide, dissolved in a fluid media of a patient including a nanoelectronic sensor and a measurement instrument in communication with the sensor and configured to receive at least a signal from the sensor indicative of a response of the sensor to at least the analyte of interest.

US Patent:

7937284, May 3, 2011

Filed:

Oct 18, 2002

Appl. No.:

10/273538

Inventors:

Daniel T. Chang - Belmont CA, US
Alexander Goldstein - Foster City CA, US
Yucheng Hu - Redwood City CA, US
Ying Wang - San Mateo CA, US
Pasan Rukmal Sirisena - San Mateo CA, US
Steve Apfelberg - Menlo Park CA, US
Marc Verbeek - Foster City CA, US
John J. Jakubik - Menlo Park CA, US
David Faibish - Foster City CA, US
Jie Liu - Redwood City CA, US
Tarri Furlong - San Leandro CA, US
Ashley Stirrup - Burlingame CA, US
Ajay Sabhlok - Fremont CA, US
Martin Renaud - San Carlos CA, US

Assignee:

Siebel Systems, Inc. - San Mateo CA

International Classification:

G05B 19/418
G06F 9/46

US Classification:

705 8

Abstract:

A method, system, and article of manufacture for defining and managing time-based organization hierarchies are disclosed herein. In one embodiment, a user interface, including a plurality of user interface displays configured to receive a user input to define and/or manage one or more instances of a time-based organization hierarchy, may be generated on a client. The user may then define, via interaction with the user interface, the at least one instance of the organization hierarchy to include a plurality of nodes, and specify an effective period for the instance of the time-based organization hierarchy by defining a start date and an end date. The user may also define a territory to correspond to each of the plurality of nodes in the organization hierarchy. In one embodiment, the territory may include at least one position and an assignment rule, the position having a corresponding quota.

US Patent:

8027869, Sep 27, 2011

Filed:

Oct 18, 2002

Appl. No.:

10/273632

Inventors:

Daniel T. Chang - Belmont CA, US
Pasan Rukmal Sirisena - San Mateo CA, US
Xin Wang - Sunnyvale CA, US
Tao Gui - Foster City CA, US
Charles Shagong - Menlo Park CA, US
Alexander Goldstein - Foster City CA, US
Steve Apfelberg - Menlo Park CA, US
Marc Verbeek - Foster City CA, US
Tarri Furlong - San Leandro CA, US
Ashley Stirrup - Burlingame CA, US
Ajay Sabhlok - Fremont CA, US
Martin Renaud - San Carlos CA, US

Assignee:

Siebel Systems, Inc. - San Mateo CA

International Classification:

G06Q 10/00

US Classification:

705 738, 705 712, 705 715, 7079991

Abstract:

A method, system, and article of manufacture for defining and managing instances of time-based organization hierarchies, and for monitoring achievement and attainment, and calculating compensation for individuals and/or groups within instances of the time-based organization hierarchies are disclosed herein. In one embodiment, a user may define and/or manage one or more instances of the time-based organization hierarchy via a user interface generated on a client. Moreover, and in response to a sales data input corresponding to a transaction, an achievement and attainment monitoring process may then be executed to accumulate transaction data in one or more achievement containers, and to compile achievement containers from a specified attainment period to calculate a user's attainment. In addition, an embodiment also provides for implementation of a compensation calculation process that may utilize the transaction data accumulated in the achievement containers to calculate an individual's compensation for a specified compensation period.

US Patent:

8600799, Dec 3, 2013

Filed:

Oct 18, 2002

Appl. No.:

10/273679

Inventors:

Daniel T. Chang - Belmont CA, US
Alexander Goldstein - Foster City CA, US
Ashish Singhal - Union City CA, US
Pankaj Bhatia - Hayward CA, US
Bhakti Vithalani - Foster City CA, US
Pasan Rukmal Sirisena - San Mateo CA, US
Steve Apfelberg - Menlo Park CA, US
Marc Verbeek - Foster City CA, US
Tarri Furlong - San Leandro CA, US
Ashley Stirrup - Burlingame CA, US
Ajay Sabhlok - Fremont CA, US
Martin Renaud - San Carlos CA, US

Assignee:

Siebel Systems, Inc. - San Mateo CA

International Classification:

G06Q 10/00

US Classification:

705 742

Abstract:

A method, system, and article of manufacture for defining and managing instances of time-based organization hierarchies, and for assigning sales credit to corresponding positions within the time-based organization hierarchy in response to a sales data input are disclosed herein. In one embodiment, a user may define and/or manage one or more instances of the time-based organization hierarchy via a user interface generated on a client. Moreover, and in response to the sales data input corresponding to a transaction, a sales credit assignment process may then be executed to assign sales credit to one or more positions within the instance of the time-based organization hierarchy based on an evaluation of conditions specified in one or more identified assignment rules associated with the time-based organization hierarchy.

US Patent:

20050112650, May 26, 2005

Filed:

Oct 14, 2004

Appl. No.:

10/965092

Inventors:

Daniel Chang - Danville CA, US
Scot Weinberger - Montara CA, US

Assignee:

Ciphergen Biosystems, Inc. - Fremont CA

International Classification:

C12Q001/68
C12M001/34

US Classification:

435006000, 435287200

Abstract:

Polyurethane polymers bearing multiple reactive groups are readily prepared from easily accessible precursors. The reactive groups of the polymers are then derivatized with binding functionalities for analytes, energy absorbing molecules for matrix assisted laser desorption/ionization mass spectrometry, fluorescent moieties and the like. The reactive groups can also be converted to different reactive groups having a desired avidity or specificity for a selected reaction partner. The polymers are incorporated into devices of use for the analysis, capture, separation, or purification of an analyte. In an exemplary embodiment, the invention provides a substrate coated with a polymer of the invention, the substrate being adapted for use as a probe for a mass spectrometer.

US Patent:

20070048181, Mar 1, 2007

Filed:

Jul 18, 2006

Appl. No.:

11/488456

Inventors:

Daniel Chang - Danville CA, US
Jean-Christophe Gabriel - Pinole CA, US
Vikram Joshi - Newington CT, US
William Mickelson - San Francisco CA, US
Joseph Niemann - Fremont CA, US
John Passmore - Berkeley CA, US
Alexander Star - Pittsburgh PA, US
Christian Valcke - Orinda CA, US

International Classification:

G01N 31/22

US Classification:

422057000

Abstract:

An electronic system and method for detecting analytes, such as carbon dioxide, is provided, using an improved nanostructure sensor (CO2 sensor). The CO2 sensor may comprise a substrate and a nanostructure, such as a one or more carbon nanotubes disposed over the substrate (e.g., as a network). One or more conductive elements may electrically communicate with the nanostructure. A counter or gate electrode may be positioned adjacent the nanostructure. A functionalization material reactive with carbon dioxide may be included, either disposed in contact with the nanostructure or isolated by a dielectric. The sensor may be connected to a circuit responsive to changes in CO2 concentration in the environment. Embodiments are described of medical sensing systems including one or more CO2 sensors. One embodiment comprises a breath sampling cannula which is connected to a sensor unit. In an alternative, the cannula permits supplemental oxygen to be administered, while recovering and measuring analytes in breath samples. The cannula may connect to a portable processor-display unit for monitoring one or more analytes, such as CO2. Another embodiment includes a cannula configured for the monitoring of sleep disorders, such as apnea, comprising one or more sensors disposed adjacent a breath sampling channel, optionally including flow rate or other sensors. The sensors may be connected by wired or wireless links for to a processor/input/display unit. Any of the embodiments may include filters, selectively permeable membranes, absorbents, and the like to precondition the breath sample, may be configured to include complementary chemistry measurements.