Patents by Inventor Philip A. Downey

Philip A. Downey 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: 4918647
    Abstract: A unit for providing an interface between analog input signals and a digital data processing system bus includes a plurality of sample-and-hold circuits coupled to the analog input signals, a multiplexer for selecting a particular sample-and-hold circuit, and an analog-to-digital converter for providing a digital signal related to the amplitude of a selected portion of the input signal. A control circuit provides control signals for controlling the operation of the sample-and-hold circuits, the multiplexer, and the analog-to-digital converter circuit. The control circuit can receive and store signals from the data processing system and use such signals to control the operation of the interface unit.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: April 17, 1990
    Assignee: Burr-Brown Limited
    Inventor: Philip A. Downey
  • Patent number: 4764866
    Abstract: A data processing system has a host processor (100) and an interface processor (160) both accessing a RAM (136) via respective RAM address generators (128, 132). RAM control logic (122) coupled to the data bus (124) and associated with the interface processor (160) provides pre-decoding of op codes on the data bus and generates control signals. The control signals are used to speed up memory access by the interface processor, to provide memory address generation for the interface processor, or to control memory access by the interface processor.
    Type: Grant
    Filed: August 7, 1986
    Date of Patent: August 16, 1988
    Assignee: Burr-Brown Limited
    Inventor: Philip A. Downey