Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Logic circuit generating method and apparatus










Image Number 3 for United States Patent #5745373.

A logic circuit generating method and apparatus generating logic circuits of a circuit system by minimizing the fan-out count of cells or cell macros constituting information specific to the circuit system. According to the method, a Boolean expression and the polarities of its input/output variables are input from a design master file of the apparatus. The Boolean expression is then transformed into a two-branch tree composed of nodes represented by the logical operators of that expression. In the two-branch tree, the nodes representing a parent and a child logical operator are converted into a single node, whereby a multiple-branch tree is generated. That is, a plurality of gates are connected to a single net, or signal line. A cell library is referenced so that cells are assigned initially to the multiple-branch tree thus obtained. The initial cell assignment is performed preferentially starting from the cell whose fan-out count is the largest. This is done to minimize the number of loads represented by the assigned cells (i.e., the number of cells connected to the output net). The number of gate stages is then evaluated. The stage count is minimized by reassigning the cells. Finally, the acquired gate logic is output to the design master file.








 
 
  Recently Added Patents
System and method for associating financial transaction data with user's project data
Emulsions containing arylboronic acids and medical articles made therefrom
Method and apparatus for detection of LVDT core fallout condition
Inductance element
Methods for testing OData services
Utility knife
Cryptography on a simplified elliptical curve
  Randomly Featured Patents
Optical information recording apparatus having write beam intensity detector
Device for converting invisible and visible radiation to visible light and/or UV radiation
Television set
Three-dimensional reconfigurable wall adornment system
USB device and peripheral device changing functional module to activate in accordance with descriptor
Light emitting diode, package structure and manufacturing method thereof
Photosensitive composition for volume hologram recording
Apparatus to make plastic seamed jackets, reinforced jacket structures, and the like
Gentiana plant named `Blue Rock`
Electronic device including two electronic components connected with each other and output terminal and method of manufacturing same