Patents by Inventor Tomoko Tsuha

Tomoko Tsuha 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).

  • Microcomputer capable of accessing to an external memory with least possible wait
    Patent number: 5511176
    Abstract: In a refresh pulse producing circuit of a microcomputer, an access detection section detects access to a non-refresh memory area of an external memory to produce a non-refresh memory signal indicative of the access. A pulse producing section produces a refresh pulse when supplied to a non-refresh memory signal. The refresh pulse producing circuit may comprise a timer for measuring a predetermined time interval from appearance of each refresh pulse to make the pulse producing section produce an additional pulse as one of such refresh pulses after lapse of a predetermined time interval even when the non-refresh memory signal is not produced.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: April 23, 1996
    Assignee: NEC Corporation
    Inventor: Tomoko Tsuha