With Particular Shape And/or Arrangement Of Plates Patents (Class 334/82)
  • Patent number: 6701779
    Abstract: A semiconductor torsional micro-electromechanical (MEM) switch is described having a conductive movable control electrode; an insulated semiconductor torsion beam attached to the movable control electrode, the insulated torsion beam and the movable control electrode being parallel to each other; and a movable contact attached to the insulated torsion beam, wherein the combination of the insulated torsion beam and the control electrode is perpendicular to the movable contact. The torsional MEM switch is characterized by having its control electrodes substantially perpendicular to the switching electrodes. The MEM switch may also include multiple controls to activate the device to form a single-pole, single-throw switch or a multiple-pole, multiple-throw switch. The method of fabricating the torsional MEM switch is fully compatible with the CMOS manufacturing process.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: March 9, 2004
    Assignee: International Business Machines Corporation
    Inventors: Richard P. Volant, Robert A. Groves, Kevin S. Petrarca, David M. Rockwell, Kenneth J. Stein
  • Patent number: 5878333
    Abstract: A tuner circuit includes a first IF signal generating a first oscillation signal, a local oscillator circuit outputting a local oscillator signal, a mixing circuit mixing the first IF signal and the oscillation signal to generate a second IF signal, and a first substrate on which at least the local oscillator signal is formed. The local oscillator circuit includes an oscillation circuit and a coaxial resonator connected to the oscillation circuit for correcting the influence of change in oscillation frequency owing to moisture and secular change. The coaxial resonator includes an impedance variable trimmer portion for adjusting the oscillation frequency, a central conductor provided at a fixed position with respect to the first substrate, and an insulator for providing insulation between the impedance variable trimmer and the central conductor. The impedance variable trimmer portion and the central conductor are adhered to one another via the insulator after adjusting is completed.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: March 2, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Masanori Kitaguchi
  • Patent number: 5070313
    Abstract: The present invention relates to a tuning arrangement for combiner filters which include a dielectric waveguide resonator (3) and a tuning capacitance (4) coacting therewith. According to the invention, the tuning capacitance (4) has the form of a substantially isosceles acute-angled triangle bent to a circular-cylindrical form with the cylinder axis parallel with the waveguide resonator (4). The apex of the triangle is attached to the center of the opposing side. The cylindrical tuning capacitance (4) can be rotated around the cylinder axis, for tuning the combiner filter.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: December 3, 1991
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventors: Olov H. Gladh, Leif S. Kagstrom
  • Patent number: 4926147
    Abstract: An apparatus for tuning a balanced-to-ground resonator, the resonator including at least one radio-frequency coil, the radio-frequency coil having an inductance forming a resonant circuit in combination with a capacitor, includes two identical differential capacitors which are mechanically coupled so that their respectively capacitances, during tuning, change in a balanced-to-ground fashion. In this tuning arrangement, the dependency of the frequency error on a change of the load of the resonator is negligibly small, so that a separate step or separate circuitry for undertaking frequency correction is not needed.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: May 15, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ralph Oppelt
  • Patent number: 4897624
    Abstract: Apparatus for adjusting capacitance between an electronic component and external circuitry. The electronic component is unitarily provided with a plurality of conductive leads for connection to external circuitry with at least one of the leads being configured to provide integral means for adjustment of capacitance. The configured lead is bent for a turnabout of about 180 degree change of direction such that when the component is mounted on a printed circuit board the portion of the lead distal of the component extends above the board and is positionally adjustable providing adjustable capactive coupling to other circuit components.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: January 30, 1990
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: Leroy S. Wignot, Robert P. Parker
  • Patent number: 4622528
    Abstract: The microwave filter comprises resonators constituted by capacitor-coupled rejector circuits. The tuning and coupling capacitors are composed of parallel metal plates supported and separated by the dielectric of a substrate. The surface of at least one plate of each tuning and/or coupling capacitor is provided with windows which can be sealed-off by a metal deposit in order to permit adjustment of each capacitor to its optimum value.
    Type: Grant
    Filed: September 11, 1984
    Date of Patent: November 11, 1986
    Assignee: Alcatel Thomson Espace
    Inventor: Roland Milard
  • Patent number: 4375626
    Abstract: A precision linear tuning circuit having particular utility to applications employing superconductors in a supercooled environment. Two capacitors, one fixed and one variable, are connected in parallel by an arrangement of shared, concentric electrodes. The variable capacitor includes one electrode and a movable facing dielectric which are tapered such that displacement of the dielectric results in a linear variation in tuning frequency.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: March 1, 1983
    Assignee: The United States of America as represented by the National Security Agency
    Inventor: John J. Hudak