Patents by Inventor Shuja Andrabi

Shuja Andrabi 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).

  • Center frequency and Q tuning of biquad filter by amplitude-limited oscillation-based calibration
    Patent number: 9673782
    Abstract: Certain aspects of the present disclosure provide methods and apparatus for calibrating a tunable active filter. One example apparatus is a filter circuit that generally includes a tunable active filter comprising at least one amplifier and a first feedback path coupled between an input and an output of the at least one amplifier, the first feedback path comprising at least one switch; and an amplitude limiter coupled to the tunable active filter and comprising at least one transistor disposed in a second feedback path coupled between the input and the output of the at least one amplifier.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: June 6, 2017
    Assignee: QUALCOMM Inc.
    Inventors: Shuja Andrabi, Rahul Karmaker