Patents by Inventor David T. Jobling

David T. Jobling 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).

  • Amplfier circuit
    Patent number: 5023564
    Abstract: An amplifier circuit is described comprising a transconductance amplifier in series with a voltage gain stage. A compensation capacitance coupled across the voltage gain stage includes a capacitance whose value is dependent upon the output voltage of the voltage gain stage so as to optimize amplifier stability over a wide range of output voltages.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: June 11, 1991
    Assignee: Motorola, Inc.
    Inventor: David T. Jobling
  • Timebase circuit
    Patent number: 4855651
    Abstract: A timebase circuit for use in the vertical timebase of a television receiver in which a linearity control current fed to the ramp capacitor is derived by multiplying a current proportional to the difference between the instantaneous and average ramp voltages by a reference current which may be adjusted to control linearity.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: August 8, 1989
    Assignee: Motorola, Inc.
    Inventors: David T. Jobling, Anthony D. Newton
  • Timebase circuit
    Patent number: 4698556
    Abstract: A timebase circuit is described, for compensation of picture dimensions of a television type display, for EHT fluctuations in which a control current is derived by multiplying a current dependent upon the picture beam current with a reference current derived from a digital to analogue converter fed with a digital code.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: October 6, 1987
    Assignee: Motorola Inc.
    Inventors: David T. Jobling, Anthony D. Newton
  • Timebase circuit
    Patent number: 4642531
    Abstract: A timebase circuit is described for providing a horizontal drive correction waveform to correct for pincushion distortion in which a parabolic correction current is derived by squaring a current proportional to the difference between the instantaneous and average values of the vertical ramp voltage. The correction current may be tilted by combination with a linear current proportional to the ramp voltage and may also be amplitude controlled.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: February 10, 1987
    Assignee: Motorola Inc.
    Inventors: David T. Jobling, Anthony D. Newton