Patents by Inventor Raymond J. Hasler

Raymond J. Hasler 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).

  • Superheterodyne radio receiver
    Patent number: 5832375
    Abstract: A satellite navigation receiver uses common dual-conversion superheterodyne and frequency synthesiser circuitry for receiving signals from both the GPS and the GLONASS satellite navigation systems. Successive first and second frequency down-converters in the receiver chain are fed by first and second local oscillator signals which are both variable in frequency such that the frequency of the first local oscillator signal is an integral multiple (preferably 8) of the second local oscillator signal. This relationship is provided by a binary divider (32) at least a portion of which may form part of a digital frequency synthesiser loop.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: November 3, 1998
    Assignee: SymmetriCom, Inc.
    Inventors: Oliver P. Leisten, Raymond J. Hasler
  • Heterodyne radio receiver with plural variable frequency local oscillator signals
    Patent number: 5606736
    Abstract: A satellite navigation receiver uses common dual-conversion superheterodyne and frequency synthesizer circuitry for receiving signals from both the GPS and the GLONASS satellite navigation systems. Successive first and second frequency down-converters in the receiver chain are fed by first and second local oscillator signals which are both variable in frequency such that the frequency of the first local oscillator signal is an integral multiple (preferably 8) of the second local oscillator signal. This relationship is provided by a binary divider (32) at least a portion of which may form part of a digital frequency synthesizer loop.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: February 25, 1997
    Assignee: SymmetriCom, Inc.
    Inventors: Raymond J. Hasler, Oliver P. Leisten
  • Radio frequency filter having a substrate with recessed areas
    Patent number: 5343176
    Abstract: A radio frequency transmission line filter has an insulative substrate substantially in the form of a plate of dielectric material, a ground plane formed by metallization on one face of the substrate, capacitor plates formed by areas of metallization on the other face of the substrate to form, in conjunction with the ground plane, capacitances, and coupled to the capacitances, respective metallized short circuit transmission line stubs forming inductances. The inductances and capacitances together form transmission line resonators. To allow the designer a wide choice in capacitance and/or inductance values, the substrate is recessed in selected areas to bring the ground plane to within predetermined distances of the capacitor plates or inductance stubs. The ground plane may be trimmed in the recessed areas to adjust component values.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: August 30, 1994
    Assignee: Applied Radiation Laboratories
    Inventor: Raymond J. Hasler