Patents by Inventor David A. Giangano

David A. Giangano 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).

  • Patent number: 5010339
    Abstract: A sliding scale averaging technique is employed for an analog-to-digital converter. An analog signal is summed with a varying number prior to conversion. This causes repeated input voltage signals of the same value to be converted in different bins of the ADC converter thereby minimizing errors due to unequal bin widths. The present invention includes a comparator technique for ensuring that the summed signal does not exceed the full dynamic range of the ADC.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: April 23, 1991
    Assignee: Grumman Aerospace Corporation
    Inventors: David A. Giangano, Martin Kesselman, Steven Bocskor, Anthony R. Celona
  • Patent number: 4914600
    Abstract: A programmable frequency identifier circuit for identifying the frequency of a contaminated signal including a digital finite impulse response filter, a zero crossing detector, a zero crossing counter, and a frequency range decoder. The filter is a programmable filter for filtering signals of the form: S(n)=S.sub.1 (n)+S.sub.2 (n)=A cos 2.pi.F.sub.1 (n)+B cos 2.pi.F.sub.2 (n) where S.sub.1 (n)=desired signal, S.sub.2 (n)=contamination, F.sub.1 =passband frequency, F.sub.2 =stopband frequency, and A,B=constants. The zero-crossing counter counts the sign changes occuring during a programmably determined frame time. The number of zero crossings occuring during the frame time is a number representing the desired frequency. The frequency range decoder is programmed with a plurality of frequency range boundaries similarly represented by a count that is based upon the programmable frame time.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: April 3, 1990
    Assignee: Gruman Aerospace Corporation
    Inventors: Cecelia Jankowski, David A. Giangano, Vincent T. Jovene, Jr.
  • Patent number: 4734921
    Abstract: Basic block shift registers are cascaded to form a fully programmable linear feedback shift register. Each of the basic block shift registers comprises a plurality of flip-flops, each of which includes control logic circuits. A polynomial equation is first fed into the linear feedback shift register for setting the respective flip-flops into predetermined logic states, which are used to encode messages to be shifted by the programmable linear feedback shift register. The number of flip-flops in the programmable linear feedback shift register can be varied, in accordance to the polynomial equation. Likewise, the polynomial equation also determines the number of times the programmable linear feedback shift register is to circulate the encoded messages.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: March 29, 1988
    Assignee: Grumman Aerospace Corporation
    Inventors: David A. Giangano, Cecelia Jankowski