Patents by Inventor Helmut H. Heimeier

Helmut H. Heimeier 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: 4397002
    Abstract: After a controlled strong lowering of the word line potential for the purpose of addressing a cell, said potential is immediately recharged simultaneously increasing the potential on the N side of the two PNP injectors of the cell and causing the injector capacitances of the selected storage cells and the bit line capacitances to form a capacitive voltage divider, so that the bit lines connected thereto are recharged to different degrees by the different magnitudes of the injector capacitances. Thus, the differential signal formed on the bit lines is noticeably amplified by the supply of currents of different magnitudes.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: August 2, 1983
    Assignee: International Business Machines Corporation
    Inventors: Rudolf Brosch, Helmut H. Heimeier, Wilfried Klein, Friedrich Wernicke
  • Patent number: 4330853
    Abstract: Semiconductor storage in which the current necessary for reading and/or writing the storage cells is generated simply by discharging input capacitances of the non-selected storage cells and is fed directly to the selected storage cells for reading and/or writing.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: May 18, 1982
    Assignee: International Business Machines Corporation
    Inventors: Helmut H. Heimeier, Wielfried Klein, Erich Klink, Friedrich C. Wernicke
  • Patent number: 4313179
    Abstract: An integrated semiconductor memory having memory cells which have (or are designed to have) inherent asymmetrical access times for the distinguishable memory states thereof. The memory is operated on the basis of the shorter access time. This is accomplished by utilizing an oppositely asymmetrical sense system, preferably in the form of a pre-set sense latch.For example, in the case of a digital memory with the reading of a "0" state having a shorter access time than the reading of a "1" state, at the beginning of a read operation a sense latch is set to the (slower) "1" state. Thus, only in the case of reading a "0" is the state of the latch changed to the "0" state. Thus, the actual access time is no longer determined by the longer access time, namely, the reading of a "1". The access time is determined by the shorter access time, namely, the reading of a "0".The concept may also be used if the sense latch has an asymmetric access time.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: January 26, 1982
    Assignee: International Business Machines Corporation
    Inventors: Helmut H. Heimeier, Wilfried Klein, Knut Najmann, Friedrich C. Wernicke