Patents by Inventor Heimbert Irmer

Heimbert Irmer 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: 4910514
    Abstract: A single-step digital-to-analog converter includes a multiplicity of individual interconnected sources disposed in a matrix having matrix rows and matrix columns; a decoder apparatus connected to the matrix for addressing the individual sources, the decoder apparatus including a column decoder for addressing at least the more significant part of an n-bit-wide digital word to be converted and a row decoder in the form of a thermometer decoder.Logic apparatus is connected between the decoder apparatus and the matrix for determining the matrix column of one of the individual sources being addressed and for suppressing switching over of the individual sources of others of the columns. The logic apparatus includes first and second logic devices, the first logic device being connected between the column decoder and the matrix for deriving further column information (E.sub.i) and additional information (S.sub.i) from column information (X.sub.i) in accordance with the logical equations: E.sub.i =S.sub.i and S.sub.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: March 20, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Heimbert Irmer, Otto Muhlbauer
  • Patent number: 4667216
    Abstract: Electric resistor, including at least two simultaneously produced monolithically combined MIS field-effect transistors for integrated circuits, each of the transistors having a source electrode and a drain electrode defining a source-drain path, a gate terminal and a channel width to channel length ratio, the transistors being connected in series with each other through the source-drain paths, each respective transistor having the gate terminal thereof connected to one of the source and drain electrodes thereof, and the transistors differ with respect to the channel width to channel length ratios thereof.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: May 19, 1987
    Assignee: Siemens Aktiengesellschaft
    Inventors: Klaus-Dieter Bigall, Heimbert Irmer