Patents by Inventor STEVEN D. WALTMAN

STEVEN D. WALTMAN 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).

  • Publication number: 20010043116
    Abstract: A variable frequency active filter circuit for tuning in a specific bandpass frequency is disclosed. The active filter incorporates a controlled oscillator circuit for tuning into a specific frequency range. A frequency input signal controls the active filter bandpass frequency by tuning the oscillator circuit to a desired frequency. The controlled oscillator circuit further includes a gain input. The gain input is set to a value just below where the oscillator circuit would oscillate.
    Type: Application
    Filed: November 1, 1999
    Publication date: November 22, 2001
    Inventor: STEVEN D. WALTMAN