Abstract: An object oriented database data acquisition device having a housing with at least one substantially planar surface and a video screen positioned thereon. The device includes a digitizer positioned substantially coextensively under the video screen and a pen having a power source for activating the digitizer. Means for controlling the data acquisition device includes controllers comprising a first microprocessor, a second microprocessor connected to said digitizer and first processor for scanning the digitizer, a third microprocessor connected to said video screen for controlling screen images, a power manager connected to the first processor, the power manager including a power source and controller, program storage, and a program stored in the program storage for controlling the microprocessors.

Abstract: Built-in self-test programmable logic arrays use a deterministic test pattern generator to generate test patterns such that each cross point in an AND-plane can be evaulated sequentially. A multiple input signature register which uses X.sup.Q +1 as its characteristic polynomial is used to evaulate the test results, where Q is the number of outputs. The final signature can be further compressed into only one bit. Instead of only determining the probability of fault detection, in this scheme, the fault detection capability has been analyzed using both the stuck at fault and the contact fault model. It can be shown that all of these faults can be detected. Shorts between two adjacent lines can be detected by using NOR gates.