Abstract: A line smoothing circuit for graphic display units, comprising a drawing data computing device for determining the dot data, direction data and correction amount data with reference to the line vector-indicating starting point coordinates and terminal point coordinates, memory for storing said data correspondingly to addresses on a display picture frame, and a position-correcting device for reading the data from said memory and determining the generation timing of the dot data on the rasters by calculating the dot location from the data or preceding address and line.

Abstract: A word recognizer probe to be removably incorporated with the mainframe of a logic analyzer is disclosed. The use of serial input-parallel output type memory means in the probe minimizes the number of interconnection signal paths between the probe and the mainframe regardless of the input bits to be recognized.