Patents by Inventor Robert H. Yates

Robert H. Yates 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).

  • Circuit for providing a symmetric current to the head of a magnetic recording device
    Patent number: 4816932
    Abstract: A write circuit for a streaming cartridge tape drive provides a substantially constant and symmetric write current to the magnetic write heads in the drive. The write current is provided by a pair of transistors coupled to the write head and the magnitude of the write current is maintained substantially constant by an operational amplifier coupled to the two write current transistors which regulates the voltage at the emitters of the two write current transistors.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: March 28, 1989
    Assignee: Archive Corporation
    Inventor: Robert H. Yates