Patents by Inventor Jeff W. Hall

Jeff W. Hall 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).

  • Power factor control circuit having a boost current for increasing a speed of a voltage control loop and method therefor
    Patent number: 5502370
    Abstract: An integrated power factor control circuit (12) for keeping an average AC line current sinusoidal and in phase with the line voltage. The integrated power factor control circuit (12) provides a boosted DC voltage greater than the amplitude of the line voltage. A transconductance amplifier (16) provides a boosted source and sink current when an output voltage is significantly out of regulation. The boosted source and sink current of the transconductance amplifier (16) increases the speed in which the voltage control loop can react to an output voltage change and reduces the time needed to generate the regulated voltage under startup. A comparator (17) provides a boost current at start up and senses a no-load condition during normal operation. The comparator (17) senses the no-load condition and stops switching to eliminate further output charging before an out of range condition occurs.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: March 26, 1996
    Assignee: Motorola, Inc.
    Inventors: Jeff W. Hall, Steven M. Barrow, Jade H. Alberkrack, Eric W. Tisinger