Patents by Inventor Samuel C.-C. Tseng

Samuel C.-C. Tseng 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: 4166258
    Abstract: A thin-film integrated circuit with tank circuit characteristics may comprise a surface acoustic wave transducer with appropriate geometry. A preferred embodiment of such integrated circuit includes, in addition to the surface acoustic wave transducer, surface acoustic wave reflecting means located adjacent the transducer, and preferably on opposite sides thereof. The reflecting means may include a pair of reflectors and be proportioned so that the device exhibits a single resonant-anti-resonant frequency pair, such as a single tank circuit. Alternatively, the reflectors may be proportioned such that the device exhibits multiple resonant-anti-resonant frequency pairs. The operating frequency may be as high as hundreds of megahertz to one gigahertz.Applications of the thin-film integrated circuit to thin-film filters and oscillators are also disclosed.
    Type: Grant
    Filed: August 29, 1974
    Date of Patent: August 28, 1979
    Assignee: International Business Machines Corporation
    Inventor: Samuel C.-C. Tseng
  • Patent number: 3990776
    Abstract: A switching device for switching an optical beam between first and second outputs each associated with first and second paths in a thin-film optical wave guide supported on a substrate. Switching occurs by reason of mode conversion in a first or second path as determined by the direction of a variable magnetic field. A common optical path is defined, in said wave guide, by a first optical coupler, for coupling an optical beam into or out of said wave guide, and a beam splitter. First and second optical paths are defined, in the same wave guide, between the beam splitter and second and third couplers each co-linear with said beam splitter. At least a portion of each of said first and second optical paths include means for periodically varying the magnetization in said path. The wave guide is subjected to a d.c. magnetic field in the plane of the wave guide and at an angle with respect to both said first and second paths. Preferably the first and second paths are perpendicular and the d.c. field makes a 45.
    Type: Grant
    Filed: June 17, 1975
    Date of Patent: November 9, 1976
    Assignee: International Business Machines Corporation
    Inventors: Samuel C.-C. Tseng, Axel R. Reisinger