Patents by Inventor Evangelos Stavrou

Evangelos Stavrou 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: 7263633
    Abstract: An integrated circuit, in particular, an integrated memory, contains a control circuit for ascertaining an operating state of the circuit. A self-repair circuit, which is connected to the control circuit, is used to implement self-test and self-repair operation for checking the functioning of, and repairing, defective circuit sections of the integrated circuit. After a supply voltage has been applied to the integrated circuit, the control circuit ascertains an operating state of the integrated circuit and, in a manner dependent thereon, the self-repair circuit is activated by the control circuit in a self-controlling manner in order to put the integrated circuit into a self-repair mode for implementing self-test and self-repair operation. The integrated circuit can be tested for its functionality and repaired even after being soldered onto a module substrate.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: August 28, 2007
    Assignee: Infineon Technologies AG
    Inventors: Evangelos Stavrou, Stephan Schröder, Manfred Pröll, Koen Van der Zanden
  • Publication number: 20060067115
    Abstract: The object of designing a magneto resistive memory such that it is as resistant as possible to magnetic stray fields, offers a longest possible retention time of the information stored, and ensures a good read signal, which is achieved by the MRAM memory cells comprising a first ferromagnetic layer or reference layer, a second ferromagnetic layer or reference layer adapted to be magnetized by an external magnetic field, and a non-magnetic or non-magnetizable intermediate layer positioned between the first and second ferromagnetic layers, wherein a ferrimagnetic assistant layer is at least partially adjacently positioned at the ferromagnetic memory layer of the MRAM memory cells, and is adapted to be mechanically coupled therewith. The present invention offers higher stability and longer retention of the information stored, and thus an improvement of the read out signal.
    Type: Application
    Filed: August 19, 2005
    Publication date: March 30, 2006
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Arndt Gruber, Evangelos Stavrou, Bachmann Bjorn
  • Patent number: 6917549
    Abstract: An integrated memory has a memory cell array having word lines and bit lines. The bit lines are organized in bit line pairs. The bit lines of the bit line pairs cross one another at a crossing location and run parallel to one another. A sense amplifier is connected to one of the bit line pairs at one end. Two precharge circuits are provided. One precharge circuit is arranged on a side of the crossing location and the other precharge circuit is arranged on a side of the crossing location. The precharge circuit facing the sense amplifier is arranged at a first distance from the crossing location and at a second distance from the sense amplifier. The RC constant of the bit lines, which is effective during the precharge operation, is reduced, so that the time period required for a precharge operation is reduced.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: July 12, 2005
    Assignee: Infineon Technologies AG
    Inventors: Manfred Pröll, Stephan Schröder, Heinz-Joachim Neubauer, Evangelos Stavrou
  • Publication number: 20040260934
    Abstract: A memory chip having an integrated address scrambler unit that has address inputs for applying an address and can be to scramble the address in various ways depending on control bits. In addition, a memory cell array is provided, which is connected downstream of the address scrambler unit. This allows an increase in flexibility during scrambling.
    Type: Application
    Filed: May 10, 2004
    Publication date: December 23, 2004
    Inventors: Manfred Proll, Ralf Schneider, Tobias Hartner, Evangelos Stavrou
  • Publication number: 20040240262
    Abstract: An integrated circuit, in particular, an integrated memory, contains a control circuit for ascertaining an operating state of the circuit. A self-repair circuit, which is connected to the control circuit, is used to implement self-test and self-repair operation for checking the functioning of, and repairing, defective circuit sections of the integrated circuit. After a supply voltage has been applied to the integrated circuit, the control circuit ascertains an operating state of the integrated circuit and, in a manner dependent thereon, the self-repair circuit is activated by the control circuit in a self-controlling manner in order to put the integrated circuit into a self-repair mode for implementing self-test and self-repair operation. The integrated circuit can be tested for its functionality and repaired even after being soldered onto a module substrate.
    Type: Application
    Filed: May 25, 2004
    Publication date: December 2, 2004
    Inventors: Evangelos Stavrou, Stephan Schroder, Manfred Proll, Koen Van der Zanden
  • Patent number: 6826111
    Abstract: A method includes providing a semiconductor memory device having at least one memory cell array. The memory cell array has a multiplicity of memory cells arranged in a matrix-like manner. Each of the memory cells is assigned a physical address and an electrical address. The method also includes inputting a physical address of a memory cell that is to be addressed into an address input device of the semiconductor memory device, decoding the input physical address into the assigned electrical address of the memory cell to be addressed by an address decoder device of the semiconductor memory device, and outputting the electrical address to the memory cell array in order to address the memory cell.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: November 30, 2004
    Assignee: Infineon Technologies AG
    Inventors: Ralf Schneider, Evangelos Stavrou, Tobias Hartner, Norbert Wirth
  • Publication number: 20040199730
    Abstract: The device according to the invention in each case has a temperature sensor for detecting the temperatures of the memory modules, which is arranged in the memory modules. In addition, a memory control module is provided, which, in order to evaluate the temperatures, is connected to the memory modules via a measurer or means for determining the highest operating temperature of the memory modules. The memory control module is designed and can be operated such that an adaptation operation is initiated, if the highest operating temperature exceeds a specific value.
    Type: Application
    Filed: March 26, 2004
    Publication date: October 7, 2004
    Inventors: Georg Erhard Eggers, Manfred Proll, Evangelos Stavrou
  • Publication number: 20040156253
    Abstract: An integrated memory has a memory cell array having word lines and bit lines. The bit lines are organized in bit line pairs. The bit lines of the bit line pairs cross one another at a crossing location and run parallel to one another. A sense amplifier is connected to one of the bit line pairs at one end. Two precharge circuits are provided. One precharge circuit is arranged on a side of the crossing location and the other precharge circuit is arranged on a side of the crossing location. The precharge circuit facing the sense amplifier is arranged at a first distance from the crossing location and at a second distance from the sense amplifier. The RC constant of the bit lines, which is effective during the precharge operation, is reduced, so that the time period required for a precharge operation is reduced.
    Type: Application
    Filed: January 20, 2004
    Publication date: August 12, 2004
    Inventors: Manfred Proll, Stephan Schroder, Heinz-Joachim Neubauer, Evangelos Stavrou
  • Publication number: 20030048672
    Abstract: The invention relates to a semiconductor memory device having
    Type: Application
    Filed: June 28, 2002
    Publication date: March 13, 2003
    Inventors: Ralf Schneider, Evangelos Stavrou, Tobias Hartner, Norbert Wirth