Patents by Inventor Aki Nishimura

Aki Nishimura 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).

  • Method and apparatus for measuring the capacitance of complementary field-effect transistor devices
    Patent number: 4795964
    Abstract: A combination inverter chain and ring oscillator (200) is used to measure the capacitance of a field effect transistor device (12, 85, 202) by measuring the current associated with propagating a signal through the circuit at a certain signal frequency. Where the device (12) is a CMOS pair, the capacitance thus obtained is reduced by a constant factor to take crowbar current (52) into account. Once the capacitance for a basic or reference device (84) has been determined, the basic structure may be modified to derive incremental per-unit area capacitances for various components of the device structure.
    Type: Grant
    Filed: August 1, 1986
    Date of Patent: January 3, 1989
    Assignee: Texas Instruments Incorporated
    Inventors: Shivaling S. Mahant-Shetti, Aki Nishimura