Patents by Inventor Zvi Greenfeld

Zvi Greenfeld 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).

  • Integrated data processing system including CPU core and parallel, independently operating DSP module
    Patent number: 5592677
    Abstract: An integrated data processing system includes a shared internal bus for transferring both instructions and data. A shared bus interface unit is connected to the shared internal bus and connectable via a shared external bus to a shared external memory array such that instructions and data held in the shared external memory array are transferrable to the shared internal bus via the shared bus interface unit. A general purpose (GP) central processing unit (CPU) is connected to the shared internal bus for retrieving GP instructions. The GP CPU includes an execution unit for executing GP instructions to process data retrieved by the GP CPU from the shared internal bus. A digital signal processor (DSP) module connected to the shared internal bus, the DSP module includes a signal processor for processing an externally-provided digital signal received by the DSP module by executing DSP command-list instructions.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: January 7, 1997
    Assignee: National Semiconductor Corporation
    Inventors: Amos Intrater, Andy Birenbaum, Gideon Intrater, Iddo Carmon, Ilan Shimony, Itael Fraenkel, Lev Epstein, Lior Katzri, Omri Viner, Raya Levitan, Ronny Cohen, Sidi Yomtov, Yehezkel Tzadik, Zvi Greenfeld, Israel Greiss, Oved Oz, Yachin Afek, Meir Tsadik, Moshe Doron, Alberto Sandbank
  • Integrated CPU core and parallel, independently operating DSP module and time-critical core priority scheme
    Patent number: 5590357
    Abstract: An integrated data processing system includes a shared internal bus for transferring both instructions and data. A shared bus interface unit is connected to the shared internal bus and connectable via a shared external bus to a shared external memory array such that instructions and data held in the shared external memory array are transferrable to the shared internal bus via the shared bus interface unit. A general purpose (GP) central processing unit (CPU) is connected to the shared internal bus for retrieving GP instructions. The OP CPU includes an execution unit for executing GP instructions to process data retrieved by the GP CPU from the shared internal bus. A digital signal processor (DSP) module connected to the shared internal bus, the DSP module includes a signal processor for processing an externally-provided digital signal received by the DSP module by executing DSP command-list instructions.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: December 31, 1996
    Assignee: National Semiconductor Corporation
    Inventors: Amos Intrater, Andy Birenbaum, Gideon Intrater, Iddo Carmon, Ilan Shimony, Itael Fraenkel, Lev Epstein, Lior Katzri, Omri Viner, Raya Levitan, Ronny Cohen, Sidi Yomtov, Yehezkel Tzadik, Zvi Greenfeld, Israel Greiss, Oved Oz, Yachin Afek, Meir Tsadik, Moshe Doron, Alberto Sandbank
  • Mechanism for implementing vector address pointer registers in system having parallel, on-chip DSP module and CPU core
    Patent number: 5511219
    Abstract: An integrated data processing system includes a shared internal bus for transferring both instructions and data. A shared bus interface unit is connected to the shared internal bus and connectable via a shared external bus to a shared external memory array such that instructions and data held in the shared external memory array are transferrable to the shared internal bus via the shared bus interface unit. A general purpose (GP) central processing unit (CPU) is connected to the shared internal bus for retrieving GP instructions. The GP CPU includes an execution unit for executing GP instructions to process data retrieved by the GP CPU from the shared internal bus. A digital signal processor (DSP) module connected to the shared internal bus, the DSP module includes a signal processor for processing an externally-provided digital signal received by the DSP module by executing DSP command-list instructions.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: April 23, 1996
    Assignee: National Semiconductor Corporation
    Inventors: Ilan Shimony, Zvi Greenfeld
  • Method and apparatus for SRT division using gray coded quotient bit signals
    Patent number: 5103420
    Abstract: A method and apparatus for performing SRT division, in which Gray coded quotient bit signals are generated during each iteration from a divisor signal having Gray coded bits, and a dividend signal. Preferably, only the two most significant bits of the divisor signal are encoded into Gray code at the start of the division process, and the Gray coded quotient bit signals are decoded after each iteration, or after the final iteration, for use in generating the final quotient. In a preferred embodiment, the invention is a circuit capable of performing both single-precision and double-precision operations, and includes a pair of alternately operating divider block circuits each for generating a pair of quotient bits during each iteration cycle.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: April 7, 1992
    Inventors: Dror Avnon, Zvi Greenfeld, Gideon Yuval, Yair Baydach