Abstract: A method is provided for increasing the speed at which a graphics image is displayed on a raster, such as in a liquid crystal display. The method incorporates off-line created look-up tables which are stored in a memory associated with a graphics processor unit. Thus, real time calculations are reduced resulting in a faster graphics image response time.
Type:
Grant
Filed:
November 12, 1998
Date of Patent:
October 24, 2000
Assignees:
L-3 Communications Corporation, Universal Avionics Systems Corporation-Intruments Division
Abstract: The present invention is directed to a method and apparatus which utilizes a software-based digital signal processing circuit to generate a signal which is representative of the status of a movable component. A preferred embodiment of the apparatus of the present invention includes a synchro which is connected to a movable component. An analog reference excitation may be applied to the synchro, and the synchro generates analog synchro signals which bear a relationship to the status of the movable component. The analog synchro signals are converted to digital synchro signals by a plurality of analog-to-digital converters. A digital reference signal and the digital synchro signals are provided to a software-based digital signal processing circuit which preferably corrects constant and time-varying errors in the digital synchro signals and generates a status signal which is representative of the status of the movable component.
Type:
Grant
Filed:
January 8, 1999
Date of Patent:
June 13, 2000
Assignees:
Universal Avionics Systems Corporation--Instrument Division, L-3 Communications Corporation
Inventors:
Joseph W. Goode, III, John R. Smith, Kenneth D. Ashcraft