Patents by Inventor John F. Bulzachelli

John F. Bulzachelli 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).

  • Bandpass sigma-delta modulator employing high-Q resonator for narrowband noise suppression
    Patent number: 6157329
    Abstract: The invention provides a superconducting bandpass sigma-delta modulator for use in analog-to-digital converters for converting an analog input signal to a digital output signal. The modulator includes an input unit, a sampling pulse generator unit, a quantizer unit, and a high Q resonator unit. The input unit is for receiving the analog input signal. The sampling pulse generator unit is for generating sampling pulses. The quantizer unit is coupled to the sampling pulse generator unit and to the input unit. The quantizer unit is for quantizing the input signal and producing an output signal representative of the analog input signal. The high Q resonator unit presents the quantizer unit with a low impedance at a center frequency of the input signal.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: December 5, 2000
    Assignee: Massachusetts Institute of Technology
    Inventors: Hae-Seung Lee, John F. Bulzachelli