Mentor Graphics Corporation

Credence Systems Corporation

Robert Randal Klingenberg

Wu-Tung Cheng

Manish Sharma

Robert Brady Benware

William A Greenseth

David Du Pont

Thomas W Rudwick, Iii

Cathie J Wier

Chris M Pieper

Eric M Bush

Aspects of the disclosed technology relate to techniques for determining canonical forms of layout patterns. Coordinates of vertices of geometric elements in a window of a layout design are first transformed into new coordinates of the vertices, wherein the coordinates of vertices do not comprise clipped coordinates and the transforming comprises: performing a translation on the coordinates of vertices based on differences between maximum and minimum X/Y coordinate values of the vertices. Based on sums of X/Y coordinate values of the new coordinates of the vertices, a canonical form of the geometric elements is determined. The canonical form coordinates of the vertices may then be determined and sorted. The sorted canonical form coordinates may be employed for pattern matching.

Canonical forms of layout patterns

A system manipulates stimulus/response signal data associated with an integrated circuit design, such as from a computer-aided engineering simulator, and converts the data into a format acceptable by a tester device which tests a prototype or production integrated circuit. The data is graphically displayed as a waveform and as a vector sequence. On-screen editing of either display is reflected in the other display. Further, the same displays are used to convert the data from event-based data into cycle-based template data compatible with a tester. A mix between event and state data during the conversion is allowed. A standard frame generation language is presented for defining tester frames for each signal within a template or timeset. A workbench editor provides for icon-based control of the system.

Graphical data base editor

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Beaverton, OR, United States of America

Robert Randal Klingenberg