Patents by Inventor Mark A. J. Alexander

Mark A. J. Alexander 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).

  • Current feedback audio power amplifier
    Patent number: 5097223
    Abstract: An audio power amplifier achieves a closed-loop bandwidth which is relatively independent of gain, and a very high slew rate capability, with a current feedback operational amplifier design. A separate operational amplifier which is connected as an integrator and operates at sub-audio frequencies compensates for the output terminal bias current of the first operational amplifier, thus mitigating the effects of current mirror mismatch in the current feedback circuit and allowing the overall output offset voltage to be significantly reduced.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: March 17, 1992
    Assignee: Analog Devices, Inc.
    Inventor: Mark A. J. Alexander