Patents by Inventor David Cave

David Cave 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).

  • Patent number: 9671800
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched compare circuit is coupled to the one transistor to inject or remove a first current into or from the transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: June 6, 2017
    Assignee: OL Security Limited Liability Company
    Inventor: David Cave
  • Patent number: 9655069
    Abstract: A method includes generating an indicator of interference introduced by a transmitter into a spectrum of an output transmit signal outside a target channel of the transmitter. The indicator is generated based on the output transmit signal. The method includes adjusting a power level of the output transmit signal based on the indicator and a predetermined interference indicator level. The indicator may indicate a carrier-to-interference (C/I) ratio of the output transmit signal, and the adjusting comprises setting the power level of the output transmit signal to a maximum power level that maintains the C/I ratio of the output transmit signal above the predetermined interference indicator level. The output transmit signal may be based on a radio-frequency output of a power amplifier of the transmitter prior to transmission over a channel and the generating comprises generating a baseband version of the output transmit signal.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: May 16, 2017
    Assignee: ViXS Systems, Inc.
    Inventors: James Robert Kelton, Michael David Cave
  • Publication number: 20170053079
    Abstract: A clinical scoring system and methods that effectively and efficiently utilizes a number of different data sources to determine a diagnosis of patient conditions. The score is compared to a spectrum of scores in order to identify between disorders, such as Inflammatory bowel disease (IBD) and irritable bowel syndrome (IBSd) or gastroesophageal reflux disease (GERD) and functional dyspepsia.
    Type: Application
    Filed: May 1, 2015
    Publication date: February 23, 2017
    Inventors: David Cave, Neil Marya, Christopher Macomber
  • Publication number: 20150123643
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched compare circuit is coupled to the one transistor to inject or remove a first current into or from the transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Application
    Filed: January 12, 2015
    Publication date: May 7, 2015
    Inventor: David Cave
  • Patent number: 8941370
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched compare circuit is coupled to the one transistor to inject or remove a first current into or from the transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Doplan Audio, LLC
    Inventor: David Cave
  • Publication number: 20130285637
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched compare circuit is coupled to the one transistor to inject or remove a first current into or from the transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Application
    Filed: April 15, 2013
    Publication date: October 31, 2013
    Inventor: David Cave
  • Patent number: 8421434
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: April 16, 2013
    Assignee: Dolpan Audio, LLC
    Inventor: David Cave
  • Publication number: 20130065544
    Abstract: A method includes generating an indicator of interference introduced by a transmitter into a spectrum of an output transmit signal outside a target channel of the transmitter. The indicator is generated based on the output transmit signal. The method includes adjusting a power level of the output transmit signal based on the indicator and a predetermined interference indicator level. The indicator may indicate a carrier-to-interference (C/I) ratio of the output transmit signal, and the adjusting comprises setting the power level of the output transmit signal to a maximum power level that maintains the C/I ratio of the output transmit signal above the predetermined interference indicator level. The output transmit signal may be based on a radio-frequency output of a power amplifier of the transmitter prior to transmission over a channel and the generating comprises generating a baseband version of the output transmit signal.
    Type: Application
    Filed: September 9, 2011
    Publication date: March 14, 2013
    Inventors: James Robert Kelton, Michael David Cave
  • Publication number: 20110234197
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Application
    Filed: June 10, 2011
    Publication date: September 29, 2011
    Applicant: DOLPAN AUDIO, LLC
    Inventor: David Cave
  • Patent number: 7960961
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: June 14, 2011
    Assignee: Dolpan Audio, LLC
    Inventor: David Cave
  • Patent number: 7835461
    Abstract: A low power radio transmitter includes an intermediate frequency stage, signal-to-pulse conversion module, and a power amplifier. The intermediate frequency stage up-converts the frequency of a base-band digital signal into an N-bit signal at the intermediate frequency. The signal-to-pulse conversion module converts the N-bit signal at the intermediate frequency into a pulse signal of M-bits at the radio frequency. As such, the signal-to-pulse conversion module is taking an N-bit signal (e.g., an 8-bit digital signal) and converting it into an M-bit pulse signal (e.g., a 1-bit pulse stream). Accordingly, the M-bit signal at the radio frequency is essentially a square-wave, which has a peak to average ratio of zero, is subsequently amplified by the power amplifier.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: November 16, 2010
    Assignee: ViXS Systems, Inc.
    Inventors: Michael May, Michael David Cave, James W. Girardeau, Jr., Mathew A. Rybicki
  • Publication number: 20100181986
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Application
    Filed: March 29, 2010
    Publication date: July 22, 2010
    Applicant: Dolpan Audio, LLC
    Inventor: David Cave
  • Patent number: 7688054
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched current source is coupled to the one transistor to inject or remove a first current into or from the emitter of that transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: March 30, 2010
    Inventor: David Cave
  • Patent number: 7592677
    Abstract: In accordance with the principles of the invention, a semiconductor substrate is provided that has a first cell formed thereon. The first cell has first and second terminals or nodes and a control terminal or node and has a characteristic breakdown voltage across the first and second terminals. A voltage sensing transistor is coupled across the power transistor first and second terminals. The voltage sensing transistor has a second element characteristic breakdown voltage that is less than the first cell characteristic breakdown voltage. The voltage sensing transistor provides a control signal to the terminal when the voltage across the first and second terminals exceeds the second element characteristic breakdown voltage.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: September 22, 2009
    Inventors: David Cave, Jade H Alberkrack
  • Publication number: 20090034660
    Abstract: A radio receiver includes a low-noise amplifier, pulse-to-signal conversion module, and intermediate frequency stage. The low-noise amplifier is operably coupled to receive and amplify an M-bit signal at a radio frequency. The M-bit signal at a radio frequency is representative of a pulse signal that is carried on a radio frequency. The pulse-to-signal conversion module demodulates the M-bit signal to produce an N-bit signal at an intermediate frequency. For example, the pulse-to-signal conversion module performs pulse-width demodulation, pulse-density demodulation, or pulse-position demodulation to recapture the N-bit signal. The intermediate frequency stage steps down the frequency of the N-bit signal to produce a base-band digital signal.
    Type: Application
    Filed: October 6, 2008
    Publication date: February 5, 2009
    Inventors: Michael May, Michael David Cave, James W. Girardeau, JR., Mathew A. Rybicki
  • Patent number: 7482797
    Abstract: A voltage bandgap circuit comprises a first transistor and a second transistor connected in a voltage bandgap circuit arrangement, the area of the first transistor is selected to be a predetermined multiple of the area of the second transistor; a differential input amplifier has a first input coupled to the first transistor and a second input coupled to the second transistor; the amplifier has its output coupled to an output node. A first trimmable resistance network is coupled to say the bandgap circuit and is trimmed to adjust the output voltage of the bandgap circuit based upon a single temperature voltage measurement made across two of the terminals of each transistor.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: January 27, 2009
    Assignee: Dolpan Audio, LLC
    Inventor: David Cave
  • Publication number: 20090022240
    Abstract: A low power distributed transmitter includes a signal generator, signal partitioning module, signal processing module, a plurality of amplifiers, and a transmitting module. The signal generator is operably coupled to generate a signal to represent base-band data in accordance with a particular transmission protocol. The signal partitioning module is operably coupled to partition the signal into a plurality of signal partitions based on a peak-to-average ratio of the signal. The signal processing module processes the plurality of signal partitions to in accordance with the particular transmission protocol to produce processed signals. Each of the amplifiers amplifies a corresponding one of the processed signal partitions to produce amplified signal partitioned. The transmitting module transmits, via an antenna or a plurality of antennas, the amplified signal partitions as a composite amplified signal.
    Type: Application
    Filed: November 1, 2006
    Publication date: January 22, 2009
    Inventors: Mathew A. Rybicki, Michael David Cave, Michael May, Timothy W. Markison
  • Patent number: 7468873
    Abstract: In accordance with the principles of the invention, a semiconductor device is provided that has a power transistor and a voltage sensing transistor formed on a substrate. The power transistor has first and second terminals and a control terminal and having a characteristic first breakdown voltage across the first and second terminals. The voltage sensing transistor is coupled across the power transistor first and second terminals. The voltage sensing transistor has a second element characteristic breakdown voltage that is less than the power transistor breakdown voltage. The second transistor provides a control signal to the power transistor control terminal when the voltage across the power transistor first and second terminals exceeds the second element characteristic breakdown voltage.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: December 23, 2008
    Assignee: Dolpan Audio, LLC
    Inventors: Jade H. Alberkrack, David Cave
  • Patent number: 7467152
    Abstract: The present invention relates to a query generator for generating a query for obtaining selected data from a database. The query generator includes a processor which is adapted to receive an input indicating the selected data to be obtained. The processor then analyses the input to determine whether the input requires a joining of data in different tables, and an aggregation step. If so, the processor generates a query which causes the database to aggregate the data within each of the tables as required; and, join the aggregated data, the joined aggregated data representing the selected data.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: December 16, 2008
    Assignee: Oracle International Corporation
    Inventors: Natascha Kearsey, Stephen David Cave, Andrew Osborn, Robert Lloyd Lavender, Kathryn Nash, Paolo Fragapane
  • Publication number: 20080013229
    Abstract: In accordance with the principles of the invention, a semiconductor device is provided that has a power transistor and a voltage sensing transistor formed on a substrate. The power transistor has first and second terminals and a control terminal and having a characteristic first breakdown voltage across the first and second terminals. The voltage sensing transistor is coupled across the power transistor first and second terminals. The voltage sensing transistor has a second element characteristic breakdown voltage that is less than the power transistor breakdown voltage. The second transistor provides a control signal to the power transistor control terminal when the voltage across the power transistor first and second terminals exceeds the second element characteristic breakdown voltage.
    Type: Application
    Filed: July 11, 2006
    Publication date: January 17, 2008
    Applicant: ANDIGILOG, INC.
    Inventors: Jade H. Alberkrack, David Cave