Patents by Inventor Raymond Louis Barrett, Jr.

Raymond Louis Barrett, Jr. 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).

  • Boot-strapped cascode current mirror
    Patent number: 5640681
    Abstract: A cascode current mirror circuit includes a cascode connected input stage (401) that operates to conduct an input current (400) in response to an input voltage of an input signal coupled to an effective transconductance of the cascode connected input stage (401). An input mirroring transistor (404) operates to control a mirror reference current (406) in response to the input voltage of the input signal. A diode connected transistor (409) coupled to a second control node of the cascode connected input stage (410) generates a control bias proportional to the mirror reference current (406) and to the input signal. A cascode connected output stage (411) has a first control node (413) coupled to the input signal and a second control node (414) coupled to the diode connected transistor (409) and the second control node (410) of the cascode connected input stage (401) for establishing an output current (415) that is substantially equivalent to the input current (400).
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: June 17, 1997
    Assignee: Motorola, Inc.
    Inventors: Raymond Louis Barrett, Jr., Barry Wayne Herold, Grazyna A. Pajunen