Patents by Inventor Mohammad Mojarradi

Mohammad Mojarradi 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: 7772550
    Abstract: The present invention discloses an mixed signal RF drive electronics board that offers small, low power, reliable, and customizable method for driving and generating mass spectra from a mass spectrometer, and for control of other functions such as electron ionizer, ion focusing, single-ion detection, multi-channel data accumulation and, if desired, front-end interfaces such as pumps, valves, heaters, and columns.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: August 10, 2010
    Assignee: California Institute of Technology
    Inventors: Rembrandt Thomas Schaefer, Mohammad Mojarradi, Ara Chutjian, Murray R. Darrach, John MacAskill, Tuan Tran, Gary R. Burke, Stojan M. Madzunkov, Brent R. Blaes, John L. Thomas, Ryan A. Stern, David Q. Zhu
  • 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
  • Publication number: 20080001658
    Abstract: A differential output analog multiplier circuit utilizing four G4-FETs, each source connected to a current source. The four G4-FETs may be grouped into two pairs of two G4-FETs each, where one pair has its drains connected to a load, and the other par has its drains connected to another load. The differential output voltage is taken at the two loads. In one embodiment, for each G4-FET, the first and second junction gates are each connected together, where a first input voltage is applied to the front gates of each pair, and a second input voltage is applied to the first junction gates of each pair. Other embodiments are described and claimed.
    Type: Application
    Filed: May 21, 2007
    Publication date: January 3, 2008
    Inventors: Mohammad Mojarradi, Benjamin Blalock, Sorin Cristoloveanu, Suheng Chen, Kerem Akarvardar
  • 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
  • Publication number: 20070008013
    Abstract: An universal and programmable logic gate based on G4-FET technology is disclosed, leading to the design of more efficient logic circuits. A new full adder design based on the G4-FET is also presented. The G4-FET can also function as a unique router device offering coplanar crossing of signal paths that are isolated and perpendicular to one another. This has the potential of overcoming major limitations in VLSI design where complex interconnection schemes have become increasingly problematic.
    Type: Application
    Filed: March 15, 2006
    Publication date: January 11, 2007
    Inventors: Amir Fijany, Farrokh Vatan, Kerem Akarvardar, Benjamin Blalock, Suheng Chen, Sorin Cristoloveanu, Elzbieta Kolawa, Mohammad Mojarradi, Nikzad Toomarian
  • Publication number: 20060092583
    Abstract: In one embodiment, an electronic device comprises a plurality of electrical switches and a plurality of energy storage elements arrayed relative to one another such that the energy storage elements may be connected in series, or in parallel, or both, to an input and an output.
    Type: Application
    Filed: October 3, 2005
    Publication date: May 4, 2006
    Inventors: Mahmoud Alahmad, Vinesh Sukumar, Fadl Zghoul, Kevin Buck, Herbert Hess, Harry Li, David Cox, Mohammad Mojarradi
  • Patent number: 5739582
    Abstract: A method in which several high voltage chips may be packaged within a single, typically low voltage plastic package. The high voltage chips are packaged to remain electrically isolated from each other to avoid undesirable side effects such as arcing between the chips but able to share electronic data and communicate with each other electronically through their input and ouput nodes. Due to the unique packaging method, the typically low voltage plastic packaging can be made to withstand operating voltages up to 35 times greater than previously attained by such low voltage plastic packaging.
    Type: Grant
    Filed: November 24, 1995
    Date of Patent: April 14, 1998
    Assignee: Xerox Corporation
    Inventors: Abdul M. ElHatem, Hung C. Nguyen, Mohammad Mojarradi