Patents by Inventor John S. Wang

John S. Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120109503
    Abstract: The operation of internal combustion, reciprocating engines in some automotive vehicles may be managed such that the engine operation is stopped each time the vehicle is brought to a stop, and then the engine is re-started when the operator presses the accelerator pedal to put the vehicle in motion. In some driving situations the engine of the vehicle may be stopped and re-started many times, which is a mode of engine operation for which the traditional 12 volt, lead-acid battery is not well suited. It is found that a six cell, lithium-ion battery combining LiFePO4 as the active positive electrode material and Li4Ti5O12 as the active negative electrode material, together with suitable separators and a suitable low freezing point electrolyte may be adapted to deliver starting power for repeated engine starting, despite short intervening charging periods.
    Type: Application
    Filed: June 28, 2011
    Publication date: May 3, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Jihui Yang, Mark W. Verbrugge, Ping Liu, John S. Wang, Steven Cai
  • Publication number: 20120100403
    Abstract: A lithium ion battery includes a positive electrode, a negative electrode, and an electrolyte operatively disposed between the positive and negative electrodes. The negative electrode contains a composite material including graphitic carbon and a disordered carbon.
    Type: Application
    Filed: October 26, 2010
    Publication date: April 26, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: John S. Wang, Mark W. Verbrugge, Elena Sherman, Ping Liu
  • Publication number: 20120101674
    Abstract: A method of determining and predicting a state of a rechargeable battery device in real time involves measuring a current and a voltage of the rechargeable battery in real time, inputting the measured current and voltage into an algorithm, and applying the algorithm to determine the state of the rechargeable battery. The algorithm includes a first mathematical model based on a direct solution of at least one differential equation characterizing an equivalent RC circuit of the battery as a function of time. The first model generates a plurality of parameters that are usable to determine the state of the battery. The algorithm further includes a second mathematical model configured to regress the parameters over time, and a third mathematical model configured to estimate the state of the battery.
    Type: Application
    Filed: October 26, 2010
    Publication date: April 26, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: SHUOQIN WANG, MARK W. VERBRUGGE, JOHN S. WANG, PING LIU
  • Patent number: 7924910
    Abstract: Methods, apparatuses, and systems are presented for performing adaptive equalization involving receiving a signal originating from a channel associated with inter-symbol interference, filtering the signal using a filter having a plurality of adjustable tap weights to produce a filtered signal, and adaptively updating each of the plurality of adjustable tap weights to a new value to reduce effects of inter-symbol interference, wherein each of the plurality of adjustable tap weights is adaptively updated to take into account a constraint relating to a measure of error in the filtered signal and a constraint relating to group delay associated with the filter. Each of the plurality of adjustable tap weights may be adaptively updated to drive group delay associated with the filter toward a target group delay.
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: April 12, 2011
    Assignee: Vitesse Semiconductor Corporation
    Inventors: Sudeep Bhoja, John S. Wang, Hai Tao
  • Patent number: 7738547
    Abstract: A method and apparatus for improved high-speed adaptive equalization that may operate effectively even in systems experiencing severe interference by using one or more error generators and taking multiple samples across a bit interval. Advantageously, a preferred embodiment of the current invention may be deployed in a clockless configuration. Preferably, one or more controllable analog filters may be controlled by one or more microprocessors used to assess the error data from the error generators and to calculate the appropriate coefficients for the filters according to one or more error minimization algorithms. Preferably, the steps of sampling, assessment, calculation and coefficient setting may be done iteratively to converge to an optimum set of filter values and/or respond dynamically to signals with time-varying noise and interference characteristics.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: June 15, 2010
    Assignee: Vitesse Semiconductor Corporation
    Inventors: John S. Wang, Sudeep Bhoja, Shanthi Pavan
  • Publication number: 20080260015
    Abstract: A method and apparatus for improved high-speed adaptive equalization that may operate effectively even in systems experiencing severe interference by using one or more error generators and taking multiple samples across a bit interval. Advantageously, a preferred embodiment of the current invention may be deployed in a clockless configuration. Preferably, one or more controllable analog filters may be controlled by one or more microprocessors used to assess the error data from the error generators and to calculate the appropriate coefficients for the filters according to one or more error minimization algorithms. Preferably, the steps of sampling, assessment, calculation and coefficient setting may be done iteratively to converge to an optimum set of filter values and/or respond dynamically to signals with time-varying noise and interference characteristics.
    Type: Application
    Filed: November 20, 2007
    Publication date: October 23, 2008
    Inventors: John S. Wang, Sudeep Bhoja, Shanthi Pavan
  • Patent number: 7301997
    Abstract: A method and apparatus for improved high-speed adaptive equalization that may operate effectively even in systems experiencing severe interference by using one or more error generators and taking multiple samples across a bit interval. Advantageously, a preferred embodiment of the current invention may be deployed in a clockless configuration. Preferably, one or more controllable analog filters may be controlled by one or more microprocessors used to assess the error data from the error generators and to calculate the appropriate coefficients for the filters according to one or more error minimization algorithms. Preferably, the steps of sampling, assessment, calculation and coefficient setting may be done iteratively to converge to an optimum set of filter values and/or respond dynamically to signals with time-varying noise and interference characteristics.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: November 27, 2007
    Assignee: Vitesse Semiconductor Corporation
    Inventors: John S Wang, Sudeep Bhoja, Shanthi Pavan
  • Patent number: 7158567
    Abstract: A method for performing adaptive equalization is presented comprising receiving a Forward Error Correction (FEC) encoded signal from a channel, filtering the received FEC encoded signal using a filter according to at least one adjustable filter coefficient to produce a filtered signal, evaluating the filtered signal to generate a signal error output, adjusting the at least one adjustable filter coefficient in response to the signal error output, performing FEC decode processing dependent on the filtered signal to generate an FEC output, and adjusting the at least one adjustable filter coefficient in response to the FEC output. In one embodiment, the signal error output relates to Mean Squared Error (MSE), and the FEC output relates to bit error rate. The at least one adjustable filter coefficient may be first adjusted in response to the signal error output until a specified condition is met, then adjusted in response to the FEC output.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: January 2, 2007
    Assignee: Vitesse Semiconductor Corporation
    Inventors: John S. Wang, Jeff Rahn, Sudeep Bhoja
  • Patent number: 7003228
    Abstract: Improved high-speed adaptive equalization is presented that may involve converting an optical signal into an electrical signal and performing equalization by (i) filtering the electrical signal with an analog filter according to at least one filter coefficient to produce a filtered output, (ii) generating an error signal from the filtered output according to an error function, (iii) providing at least one control signal to the analog filter for adjusting the at least one filter coefficient, (iv) detecting a relationship between a change in the at least one filter coefficient and a change in the error signal, and (v) adjusting the at least one filter coefficient according to the relationship to minimize the error signal. The least one coefficient may comprise a plurality of coefficients, and the relationship may be a gradient estimate having multiple components, each determined by varying only one of the coefficients and detecting a resulting change in the error signal.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: February 21, 2006
    Assignee: Vitesse Semiconductor Corporation
    Inventors: John S. Wang, Sudeep Bhoja, Shanthi Pavan, Hai Tao
  • Patent number: 6934869
    Abstract: A method and apparatus for eliminating dead zone in a phase locked loop with binary quantized detectors are described. Dead zone can be eliminated by changing the threshold used to quantize the cross point sample. A quantized cross point sample is integrated in order to set a new threshold. The integration may be performed during data transitions to eliminate threshold drift during long sequences where no transitions occur.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: August 23, 2005
    Assignee: Big Bear Networks, Inc.
    Inventors: Sudeep Bhoja, John S. Wang, Chris R. Cole
  • Publication number: 20040136731
    Abstract: Improved high-speed adaptive equalization is presented that may involve converting an optical signal into an electrical signal and performing equalization by (i) filtering the electrical signal with an analog filter according to at least one filter coefficient to produce a filtered output, (ii) generating an error signal from the filtered output according to an error function, (iii) providing at least one control signal to the analog filter for adjusting the at least one filter coefficient, (iv) detecting a relationship between a change in the at least one filter coefficient and a change in the error signal, and (v) adjusting the at least one filter coefficient according to the relationship to minimize the error signal. The least one coefficient may comprise a plurality of coefficients, and the relationship may be a gradient estimate having multiple components, each determined by varying only one of the coefficients and detecting a resulting change in the error signal.
    Type: Application
    Filed: September 30, 2003
    Publication date: July 15, 2004
    Applicant: Big Bear Networks, Inc.
    Inventors: John S. Wang, Sudeep Bhoja, Shanthi Pavan, Hai Tao
  • Patent number: 6545567
    Abstract: Method and system for a programmable analog tapped delay line filter are disclosed. One embodiment of the present invention is a programmable analog tapped delay line filter comprising an input line, an output line, and one or more gaincells or taps coupled between the input line and the output line. The input and output lines each comprises a cascade of one or more differential delay cells, and each of the one or more gaincells or taps corresponds to a tap weight or coefficient. Furthermore, the input and output lines are terminated in impedances and the filter produces one or more outputs.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: April 8, 2003
    Assignee: Big Bear Networks, Inc.
    Inventors: Shanthi Pavan, Sudeep Bhoja, John S. Wang
  • Patent number: 6306093
    Abstract: A method and system for generating data for a spectral Doppler strip in an ultrasound system includes a beamformer that provides Doppler data to a signal processor. The signal processor applies an autoregressive model and determines autoregressive parameters responsive to the Doppler data. Information responsive to the autoregressive parameters is generated, and a window function is applied to the information. At least one spectrum responsive to the auto-regressive parameter is estimated with a Fourier transform.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: October 23, 2001
    Assignee: Acuson Corporation
    Inventor: John S. Wang
  • Patent number: 6106465
    Abstract: An ultrasonic method and system for boundary detection of an object of interest in an ultrasound image is provided. One ultrasound imaging system that is provided acquires an ultrasound image from a subject using harmonic information and automatically generates a boundary oriented with respect to an object of interest in the ultrasound image. Another ultrasound imaging system that is provided receives a plurality of user-proposed transition positions oriented with respect to an object of interest in an ultrasound image and automatically generates a computed boundary oriented with respect to the object of interest at least partially as a function of the plurality of user-proposed transition positions. The ultrasound image used in this system can be generated with received ultrasonic energy at a fundamental frequency or at a harmonic of the fundamental frequency.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: August 22, 2000
    Assignee: Acuson Corporation
    Inventors: David J. Napolitano, John S. Wang
  • Patent number: 6083168
    Abstract: An ultrasound system and method are provided for improving resolution and operation. The system applies different imaging parameters within and outside a region of interest in an ultrasound image to improve spatial and/or temporal resolution inside a region of interest. The system also increases an apparent frame rate within a region of interest in an ultrasound-image frame by generating a motion-compensated interpolated image based on measured motion. The ultrasound imaging system also performs a method for automatically adjusting ultrasound imaging parameters in at least a portion of an ultrasound image in response to transducer or image motion to improve spatial or temporal resolution. With the measured motion, the system can also alter an operating mode of an ultrasound transducer array in response to an absence of transducer motion. Further, the system corrects distortion in an acquired ultrasound image caused by transducer or image motion.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: July 4, 2000
    Assignee: Acuson Corporation
    Inventors: John A. Hossack, John S. Wang
  • Patent number: 6030345
    Abstract: A method and system for generating data for a spectral Doppler strip in an ultrasound system includes a beamformer that provides Doppler data to a signal processor. The signal processor applies an autoregressive model and determines autoregressive parameters responsive to the Doppler data. Information responsive to the autoregressive parameters is generated, and a window function is applied to the information. At least one spectrum responsive to the autoregressive parameter is estimated with a Fourier transform.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: February 29, 2000
    Assignee: Acuson Corporation
    Inventor: John S. Wang
  • Patent number: 5873830
    Abstract: An ultrasound system and method are provided for improving resolution and operation. The system applies different imaging parameters within and outside a region of interest in an ultrasound image to improve spatial and/or temporal resolution inside a region of interest. The system also increases an apparent frame rate within a region of interest in an ultrasound-image frame by generating a motion-compensated interpolated image based on measured motion. The ultrasound imaging system also performs a method for automatically adjusting ultrasound imaging parameters in at least a portion of an ultrasound image in response to transducer or image motion to improve spatial or temporal resolution. With the measured motion, the system can also alter an operating mode of an ultrasound transducer array in response to an absence of transducer motion. Further, the system corrects distortion in an acquired ultrasound image caused by transducer or image motion.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: February 23, 1999
    Assignee: Acuson Corporation
    Inventors: John A. Hossack, Bhaskar S. Ramamurthy, John S. Wang, Kutay F. Ustuner, Ching-Hua Chou, James W. Arenson, Arvind Jain
  • Patent number: 5642732
    Abstract: The invention provides a method and system for estimating missing Doppler signals and spectra in an ultrasound imaging system: (1) parameters representative of a Doppler data model are matched to actual Doppler data that is received; (2) the parameters are interpolated or extrapolated (possibly after normalization, smoothing, or other manipulation) for regions where actual Doppler data is missing ("Doppler gaps"); and (3) a set of synthesized Doppler spectra are constructed, using the model and the interpolated or extrapolated parameters, for those Doppler gaps. The Doppler data model is an autoregressive model, or another model in which the Doppler data may be approximated by supplying a source signal to an autoregressive filter. The parameters of the model comprise a set of autoregressive filter coefficients and a .sigma..sup.2 (variance) value. The reflection coefficients of these autoregressive filter coefficients are determined. The reflection coefficients and .sigma..sup.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: July 1, 1997
    Assignee: Acuson Corporation
    Inventor: John S. Wang
  • Patent number: 5634095
    Abstract: A visual procedure aides the program builder in linking objects in a visual application builder where the objects are on different pages of the application builder notebook. When the target object is on another page of the notebook, the user selects the source object. The user then flips the notebook page. During the page flipping, the selected source object is shown as an outline shadow with a page number under it. If the new page is shown with the desired target object on it, the user drags and drops a link between the shadow source object and the target object to make a connection. If the user flips to the source object page, then the target object will become the shadow object with a page number label next to it. If the shadow object is too big and covers the target object completely or for any other reason, the user may want to optionally use the outside page connector technique. This can be done by dragging and dropping the link from the source object to any point outside the notebook.
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: May 27, 1997
    Assignee: International Business Machines Corporation
    Inventors: John S. Wang, Richard E. Berry
  • Patent number: 5557731
    Abstract: The present invention provides a method and system for permitting a user to efficiently create an application utilizing a plurality of objects in a graphic user interface. A database is created to track objects selected by a user. The objects selected by a user for utilization in the application are registered in the database. The user is permitted to create definitions for the selected objects. An absence of a definition for one of the selected objects within the database is graphically indicated, wherein the user may efficiently identify objects requiring a definition.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: September 17, 1996
    Assignee: International Business Machines Corporation
    Inventors: Shih-Gong Li, John S. Wang