Patents by Inventor Brian Keith Stevenson

Brian Keith Stevenson 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: 6198265
    Abstract: An electrical circuit provides a fixed frequency switching regulator, having improved dynamic response, and a low count of external discrete elements. The circuit can be used at 100% duty cycle and does not require a minimum load or the components usually found in such circuits for compensation. A current source is used to charge a timing capacitor. A comparator is used in conjunction with a hysteresis circuit so that as the timing capacitor is charged the voltage on one input of the comparator rises until reaching a set input voltage level whereupon the timing capacitor is discharged to ground. A PWM latch logic element is used to control output to a control switch, a FET, so that positive going output pulses are received at an output terminal. A divider network between the output terminal and the timing capacitor along with a switch controlled by the PWM latch element are used for slope compensation for maintaining operational synchronization to the oscillator.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: March 6, 2001
    Assignee: Unisem, Inc.
    Inventor: Brian Keith Stevenson