Patents by Inventor Ernest D. D. Schmidt

Ernest D. D. Schmidt 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).

  • Servo amplifier providing current torque and dynamic parameters
    Patent number: 4185235
    Abstract: A servo amplifier system includes first and second operational amplifiers, with the second amplifier having a low output impedance. A torque coil is connected directly from the output circuit of the first amplifier to the input circuit of the second amplifier free of any impedance elements which would tend to make the torque coil subject to frequency response variations. Various circuits are provided to feed back error signals from the output circuit of the second amplifier to the input circuit of the first amplifier. A test signal may be connected across torque coil to test the response of the accelerometer including the torque coil.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: January 22, 1980
    Assignee: Schaevitz Engineering
    Inventor: Ernest D. D. Schmidt