Patents by Inventor Edwin Stanley Busby

Edwin Stanley Busby 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).

  • Non-linear digital-to-analog converter for servo circuit
    Patent number: 4020485
    Abstract: A shunt-series resistive network in which the shunt elements are switched in and out of the circuit in accordance with the individual bits of a digital binary signal and wherein the values of the various resistive elements are selected to provide a network impedance which varies as a preselected expotential function of the quantity represented by the digital signal. A non-linear converter employing this network is used in a servo circuit for driving a controlled device as a non-linear expotential function of its relative position.
    Type: Grant
    Filed: April 3, 1972
    Date of Patent: April 26, 1977
    Assignee: Ampex Corporation
    Inventor: Edwin Stanley Busby