D.c. Bias Control Patents (Class 363/117)
  • Patent number: 12283810
    Abstract: The object of the invention is interference filter arrangements with surge protection having, an input for a conductive phase and a neutral phase of a three-wire alternating-current voltage system, an output for a protected conductive phase and a protected neutral phase of a three-wire alternating-current voltage system, at least one terminal for a protective earth, at least one first coil arranged as a filter element between the input of the conductive phase and the output of the protected conductive phase, at least one second coil arranged as a filter element between the input of the neutral phase and the output of the protected neutral phase, at least one first three-pole gas-filled surge arrester arranged with its two external poles parallel to the first coil, at least one second three-pole gas-filled surge arrester arranged with its two external poles parallel to the second coil.
    Type: Grant
    Filed: May 17, 2023
    Date of Patent: April 22, 2025
    Assignee: PHOENIX CONTACT GMBH & CO. KG
    Inventor: Hannes Sagebiel
  • Patent number: 5698344
    Abstract: Ferroelectric materials are disclosed as reversible holographic recording media (25) for use in two-photon recording systems. The ferroelectric materials disclosed herein provide long-lived electronic states intermediate the ferroelectric material's valence and conduction bands. These intermediate states have a sufficiently long life (on the order of 1 to 100 milliseconds) that low-power continuous wave ("cw") lasers (1) can be used to record interference patterns on them. Thus, two-photon holographic recording systems are also disclosed which do not require high-power, short pulse length, mode-locked or Q-switched lasers. Rather, the disclosed holographic recording systems employ visible and near IR cw lasers such as diode lasers.The disclosed two-photon holographic recording systems provide for absorption of a first photon which excites electrons of holographic recording media to an intermediate state.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: December 16, 1997
    Assignee: SRI International
    Inventors: Yu Sheng Bai, Ravinder Kachru
  • Patent number: H843
    Abstract: Utilizing sections of charged transmission line cables and optically-actied semiconductor switches, the direct generation of high power RF is demonstrated.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: November 6, 1990
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Anderson H. Kim, Maurice Weiner, Lawrence J. Bovino, Robert J. Youmans