Patents by Inventor I. Ross Mactaggart

I. Ross Mactaggart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5596539
    Abstract: A self-timed memory control system including a dummy row and column of memory cells along adjacent edges of a core memory array. Control logic receives an external clock signal and initiates address decoding, and also asserts a sense enable signal for activating the sense amplifiers. A dummy driver receives the enable signal and asserts a select signal on a dummy select line, which causes a memory access to occur in the dummy portion simultaneously with each access of the core memory array. A fixed memory cell in the dummy path always asserts a logic zero to a dummy sense amplifier, which senses the logic zero and respondingly asserts a timing signal. The dummy sense amplifier is biased with a voltage offset to favor a logic one, so that the timing signal is preferably delayed until after the output data of the core memory array has stabilized.
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: January 21, 1997
    Assignee: LSI Logic Corporation
    Inventors: Robin H. Passow, Gordon W. Priebe, Ronald D. Isliefson, I. Ross Mactaggart, Kevin R. LeClair