Patents by Inventor Karl Elshuber

Karl Elshuber 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).

  • Patent number: 4159487
    Abstract: An automatic TV tuner circuit responsive to a tuning voltage for tuning over a desired frequency reception range. The tuning voltage is generated by a staircase voltage generator. A discriminator produces an output signal having a nominal value when the receiver is tuned to a transmitted broadcast frequency and at a discriminator output having a predetermined difference from the nominal value, a sequence control circuit halts the operation of the staircase generator and regulates the tuning voltage in a continuous manner under control of the discriminator output signal to complete the tuning process.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: June 26, 1979
    Assignee: Texas Instruments Deutschland GmbH
    Inventors: Karl Elshuber, Hans Tonn, Laszlo Gotz
  • Patent number: 4004231
    Abstract: A circuit arrangement for automatic fine tuning of a broadcast receiver to an assigned transmission frequency. The receiver has an input stage which can be tuned over a desired receiving frequency range by a variable control voltage fed to the input stage. The input stage feeds a discriminator having an S-shaped output signal characteristic and producing an output signal having a given nominal value when the input stage is tuned to the assigned frequency. A first variable frequency clock generator is controlled by a control signal depending on the output signal of the discriminator and feeds an up/down counter the count of which is converted by a digital-analog converter into the control voltage for the input stage. The first clock generator is so designed that its output signal frequency varies constantly in dependence on the deviation of the discriminator output signal from the nominal value, and that it has a zero value when the discriminator output signal has the nominal value.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: January 18, 1977
    Assignee: Texas Instruments Incorporated
    Inventors: Karl Elshuber, Laszlo Gotz