Patents by Inventor Christopher Isert

Christopher Isert 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).

  • Frequency counter based analog-to-digital converter
    Patent number: 7948421
    Abstract: An analog-to-digital converter (ADC) is provided. The ADC includes a variable oscillator, a frequency divider, a clock circuit, and a counter. The variable oscillator is coupled to a sensor and configured to generate an oscillating signal based on a measurement generated by the sensor. The frequency divider is coupled to the variable oscillator and configured to divide a frequency of the oscillating signal. The clock circuit is configured to generate a clock signal at a defined frequency. The counter is coupled to the frequency divider and to the clock and is configured to generate a bit stream representative of a first number of periods of the clock signal during a second number of periods of the divided oscillating signal.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: May 24, 2011
    Assignee: University of Louisville Research Foundation, Inc.
    Inventors: Michael Calvin McCoy, Christopher Isert, Douglas Jackson, John Naber
  • FREQUENCY COUNTER BASED ANALOG-TO-DIGITAL CONVERTER
    Publication number: 20090315749
    Abstract: An analog-to-digital converter (ADC) is provided. The ADC includes a variable oscillator, a frequency divider, a clock circuit, and a counter. The variable oscillator is coupled to a sensor and configured to generate an oscillating signal based on a measurement generated by the sensor. The frequency divider is coupled to the variable oscillator and configured to divide a frequency of the oscillating signal. The clock circuit is configured to generate a clock signal at a defined frequency. The counter is coupled to the frequency divider and to the clock and is configured to generate a bit stream representative of a first number of periods of the clock signal during a second number of periods of the divided oscillating signal.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 24, 2009
    Inventors: Michael Calvin McCoy, Christopher Isert, Douglas Jackson, John Naber