Patents by Inventor Dooho Yum

Dooho Yum 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).

  • Amplifier employing matched transistors to provide linear current feedback
    Patent number: 4187472
    Abstract: A feedback transistor, whose base and emitter are connected respectively to the base and emitter of a common emitter output transistor, conducts a collector current which is directly proportional to the output current. The collector current of the feedback transistor is fed back to the input of an amplifier which drives the output transistor. The resulting negative feedback controls overall gain, reduces distortion, and controls the quiescent current of the output transistor. Application of this linear current feedback technique to both class A and class B amplifiers is disclosed.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: February 5, 1980
    Assignee: Beltone Electronics Corporation
    Inventor: Dooho Yum