Patents by Inventor Brendan John Whelan

Brendan John Whelan 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: 7772920
    Abstract: A first and a second group of individual transistors in a voltage reference may collectively function as a first and a second composite transistor with a first and a second emitter area equal to the combined areas of the emitters of the first and the second groups of individual transistors, respectively. The second emitter area may be larger than the first emitter area. The stability of the reference voltage may depend upon the stability of the ratio between the first emitter area and the second emitter area. The first group of individual transistors may not be at the center of an arrangement of the second group of individual transistors. The constant reference voltage may vary due to thermal hysteresis by less than 200 parts per million over a 40 degree centigrade temperature range.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: August 10, 2010
    Assignee: Linear Technology Corporation
    Inventors: Michael B. Anderson, Robert C. Dobkin, Brendan John Whelan