Patents by Inventor Greg Levanas

Greg Levanas 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).

  • Compact resolver pre-amplification assembly (RPA) module
    Patent number: 10259120
    Abstract: A compact resolver pre-amplification assembly has first and second printed circuit boards. The boards include an interface with an N/N?1 resolver and a resolver-to-digital converter and three signal paths. The first and second circuit boards are contained in a single package configured for mounting on a robotic joint while providing high amplification and noise rejection. Low level sensitive signal are separated from high level excite signals by locating sensitive signals on the first board and excite signals on the second board.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: April 16, 2019
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Eric Rossland, Mark Fratta, Greg Levanas
  • Compact Resolver Pre-Amplification Assembly (RPA) Module
    Publication number: 20160332307
    Abstract: A compact resolver pre-amplification assembly has first and second printed circuit boards. The boards include an interface with an N/N?1 resolver and a resolver-to-digital converter and three signal paths. The first and second circuit boards are contained in a single package configured for mounting on a robotic joint while providing high amplification and noise rejection. Low level sensitive signal are separated from high level excite signals by locating sensitive signals on the first board and excite signals on the second board.
    Type: Application
    Filed: May 12, 2016
    Publication date: November 17, 2016
    Inventors: Eric Rossland, Mark Fratta, Greg Levanas
  • Wide-temperature integrated operational amplifier
    Patent number: 7514998
    Abstract: The present invention relates to a reference current circuit. The reference circuit comprises a low-level current bias circuit, a voltage proportional-to-absolute temperature generator for creating a proportional-to-absolute temperature voltage (VPTAT), and a MOSFET-based constant-IC regulator circuit. The MOSFET-based constant-IC regulator circuit includes a constant-IC input and constant-IC output. The constant-IC input is electrically connected with the VPTAT generator such that the voltage proportional-to-absolute temperature is the input into the constant-IC regulator circuit. Thus the constant-IC output maintains the constant-IC ratio across any temperature range.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: April 7, 2009
    Assignee: California Institute of Technology
    Inventors: Mohammad Mojarradi, Greg Levanas, Yuan Chen, Raymond S. Cozy, Robert Greenwell, Stephen Terry, Benjamin J. Blalock
  • Wide-temperature integrated operational amplifier
    Publication number: 20070229158
    Abstract: The present invention relates to a reference current circuit. The reference circuit comprises a low-level current bias circuit, a voltage proportional-to-absolute temperature generator for creating a proportional-to-absolute temperature voltage (VPTAT), and a MOSFET-based constant-IC regulator circuit. The MOSFET-based constant-IC regulator circuit includes a constant-IC input and constant-IC output. The constant-IC input is electrically connected with the VPTAT generator such that the voltage proportional-to-absolute temperature is the input into the constant-IC regulator circuit. Thus the constant-IC output maintains the constant-IC ratio across any temperature range.
    Type: Application
    Filed: December 7, 2006
    Publication date: October 4, 2007
    Inventors: Mohammad Mojarradi, Greg Levanas, Yuan Chen, Raymond Cozy, Robert Greenwell, Stephen Terry, Benjamin Blalock