Patents by Inventor David Christopher Clarkson

David Christopher Clarkson 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).

  • Summation of band-limited ADC outputs having different resolutions and rates
    Patent number: 6342850
    Abstract: A high speed analog-to-digital converter utilizes a fine resolution ADC to digitize the low band component of an analog video signal to produce a fine resolution signal and a coarse resolution ADC to digitize the full spectrum of the analog signal and produce a coarse resolution signal. The coarse resolution signal is subtracted from the fine resolution signal to generate a summed signal containing a quantization error, which is filtered through a low pass digital filter to filter out the high band component and pass the quantization error. The filter output is summed with the coarse resolution signal to restore the fine resolution of the low band, producing a digital output signal that has a resolution suitable for high definition applications.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: January 29, 2002
    Assignee: Innovision Limited
    Inventors: Timothy John Borer, Gary Bryan Wordsworth, David Christopher Clarkson