Patents Assigned to AST Research
  • Patent number: 5779502
    Abstract: In an integrated circuit socket an integrating capacitor filter carried on a mylar film or integral with said socket incorporated into the top of an integrated circuit socket electrically connected to the voltage and ground connecting pins or electrodes of the integrated circuit in as close as proximity to the entry point into the integrated circuit as is possible. This reduces the lead distance between the entry point in the integrated circuit including CPU integrated circuits at both the voltage and ground connection and the capacitive element to a minimum and minimizes interference in the power source by minimizing inductance in capacitor leads experienced in high speed electrical circuits. It is particular useful in minimizing electrical interference in the voltage applied to CPU by incorporating the capacitive element directly into the CPU socket so that it is electrically coupled between the voltage pin and the ground pin of the CPU in close proximity to the entry point in the CPU.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 14, 1998
    Assignee: AST Research
    Inventors: Reza E. Daftari, Bao G. Le
  • Patent number: 5136711
    Abstract: A system for integrating incompatible hard disk partitioning systems in a single hard disk drive provides a method for installing and operating multiple incompatible absolute zero sector operating systems on the same hard disk drive with a first operating system and its associated boot loader located at absolute physical sector zero and a second operating system and its associated boot loader located at an absolute physical sector other than zero. The system includes a second BIOS that automatically offsets physical addresses for disk requests from the second operating system so that correct absolute physical address of the disk is accessed. This facilitates the use of a single hard disk drive in dual-compatible computers which functions selectively in an IBM AT compatible mode and a non-IBM AT compatible mode.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: August 4, 1992
    Assignee: AST Research
    Inventors: James M. Hugard, George C. Y. Li