Patents by Inventor Ming T. Cheng

Ming T. Cheng 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: 4709169
    Abstract: A logic circuit network with circuitry for independently controlling at least one of the logic levels generated thereby, comprising, in one embodiment, a logic circuit with an output current node, a complement output current node, and at least one input line, the circuit for generating an output voltage level at the output current node which depends on the amount of current drawn therethrough, and for generating a complement output voltage level at the complement output current node which depends on the amount of current drawn therethrough; in combination with a current drawing means for drawing a controlled amount of current through one of those nodes to adjust the voltage level at that node. In one embodiment, this current drawing means is connected to a voltage reference level V.sub.R1, and operates to draw an amount of current from whichever current node is at a voltage level which is closest to a predetermined constant plus this voltage reference level V.sub.R1.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: November 24, 1987
    Assignee: International Business Machines Corporation
    Inventors: Gerard J. Ashton, Joseph R. Cavaliere, Ming T. Cheng