Patents by Inventor Thomas E. McEwan

Thomas E. McEwan 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: 5345471
    Abstract: An ultra-wideband (UWB) receiver utilizes a strobed input line with a sampler connected to an amplifier. In a differential configuration, .+-.UWB inputs are connected to separate antennas or to two halves of a dipole antenna. The two input lines include samplers which are commonly strobed by a gating pulse with a very low duty cycle. In a single ended configuration, only a single strobed input line and sampler is utilized. The samplers integrate, or average, up to 10,000 pulses to achieve high sensitivity and good rejection of uncorrelated signals.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: September 6, 1994
    Assignee: The Regents of the University of California
    Inventor: Thomas E. McEwan
  • Patent number: 5332938
    Abstract: The problem of source lead inductance in a MOSFET switching circuit is compensated for by adding an inductor to the gate circuit. The gate circuit inductor produces an inductive spike which counters the source lead inductive drop to produce a rectangular drive voltage waveform at the internal gate-source terminals of the MOSFET.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: July 26, 1994
    Assignee: Regents of the University of California
    Inventor: Thomas E. McEwan
  • Patent number: 5274271
    Abstract: An inexpensive pulse generating circuit is disclosed that generates ultra-short, 200 picosecond, and high voltage 100 kW, pulses suitable for wideband radar and other wideband applications. The circuit implements a nonlinear transmission line with series inductors and variable capacitors coupled to ground made from reverse biased diodes to sharpen and increase the amplitude of a high-voltage power MOSFET driver input pulse until it causes non-destructive transit time breakdown in a final avalanche shockwave diode, which increases and sharpens the pulse even more.
    Type: Grant
    Filed: July 12, 1991
    Date of Patent: December 28, 1993
    Assignee: Regents of the University of California
    Inventor: Thomas E. McEwan