Patents by Inventor Michael D. Keane

Michael D. Keane 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).

  • Multiple string, multiple output digital to analog converter
    Patent number: 10075179
    Abstract: A multiple impedance string, multiple output digital-to-analog converter (DAC) circuit that can include a shared coarse resolution DAC, two first fine resolution DACs to receive outputs of the MSB DAC, and a multiplexer to multiplex outputs of the first and second fine resolution DACs to output terminals. The multiplexer can be configured to interchange coupling of the outputs of the first and second fine resolution DACs using one or more MSBs.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: September 11, 2018
    Assignee: Analog Devices Global
    Inventors: Michael D. Keane, Johan H. Mansson, Dennis A. Dempsey
  • System and method of clock generation in high speed serial communication
    Patent number: 8854096
    Abstract: A transmission system may include an oscillator, a serializer, and a driver. The oscillator may generate at least two clock signals. The serializer may modulate a plurality of data streams based upon the at least two clock signals and a plurality of channels of data. The driver may receive and combine the plurality of data streams into a single output data stream, wherein the single output data stream has a clock frequency higher than frequency of each of the at least two clock signals.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: October 7, 2014
    Assignee: Analog Devices Technology
    Inventors: Michael R. Elliott, Brad P. Jeffries, Michael D. Keane, Johan H. Mansson, Axel Zafra Petersson
  • Multiplexing circuit
    Publication number: 20090140775
    Abstract: A multiplexing circuit comprising an converter for converting an input voltage signal to an input current signal. A plurality of first current mirrors for mirroring the input current signal. A switching unit selectively switches each first current mirror to a corresponding output.
    Type: Application
    Filed: November 2, 2007
    Publication date: June 4, 2009
    Inventor: Michael D. Keane