Patents by Inventor Gabriel J. Uscategui

Gabriel J. Uscategui 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).

  • Low distortion feedback IC amplifier and method
    Patent number: 5789982
    Abstract: Circuits and methods to minimize total harmonic distortion in an integrated circuit feedback amplifier. Complementary transistors in the signal path are selected so that their base-to-collector capacitances are matched. Additionally, the DC operating currents of such transistors are matched, thereby cancelling non-linearities due to base-to-collector capacitances.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: August 4, 1998
    Assignee: Harris Corporation
    Inventors: Gabriel J. Uscategui, Glenn Wells
  • Voltage independent symmetrical current source with cross-coupled transistors
    Patent number: 5446368
    Abstract: A symmetrical current source 10 has a pnp current source 11 including four npn transistors Q1-Q4 and a pnp output transistor Q28 and an npn current sink 12 including pnp transistors Q5-Q8 and an output transistors Q29. In current source 11 cross coupled transistors Q3, Q4 establish a predetermined bias for source 11; cross coupled transistors Q7, Q8 establish a predtermined bias for sink 12.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: August 29, 1995
    Assignee: Harris Corporation
    Inventor: Gabriel J. Uscategui
  • Method of fabricating low noise reference diodes and transistors
    Patent number: 4590664
    Abstract: The thick oxide over the surface portion of a P/N junction of a reference diode is removed, a thin oxide is grown thereon, and a contaminated shield layer is formed on the thin oxide. In addition to improving the reversed biased diode, the same method improves the forward biased emitter-base surface junction of a vertical bipolar transistor. The shield layer may be biased separate from the transistor.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: May 27, 1986
    Assignee: Harris Corporation
    Inventors: John S. Prentice, Gabriel J. Uscategui