Patents by Inventor Daniel W. Tjoa

Daniel W. Tjoa 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: 3950654
    Abstract: An initializing circuit for automatically providing a pulse of a duration sufficient to initialize all the relevant storage elements in an electronic calculator computing system having one or two power supplies. It comprises a power-on pulse generator controlled by two phase clock buffers utilizing a feed-back loop including a bit of delay to guarantee a minimum of one bit time duration for the power-on level. The two phase clock buffers are activated at turn-on to remain in a steady state by a power-on level detecting sub-circuit to control the pulse generator. When a one bit pulse is insufficient to initialize the system, a flip-flop and a counter may be used to generate a longer pulse.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: April 13, 1976
    Assignee: American Microsystems, Inc.
    Inventors: Walter F. Broedner, Ravinder K. Bhatnagar, W. Eugene Hill, Daniel W. Tjoa