Patents by Inventor Ken Saitoh

Ken Saitoh 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: 6616462
    Abstract: This invention is a convertible multi-diameter sleeve for optical fiber connectors to allow optical fiber cables with plug ferrules of different internal and external diameters to be pushed into the sleeve and connected with precise core alignment keeping stable conditions. The sleeve has at least one slot extending part way along the length of the sleeve.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: September 9, 2003
    Assignee: Tonami Electronics Corporation
    Inventor: Ken Saitoh
  • Publication number: 20030044124
    Abstract: This invention is a convertible multi-diameter sleeve for optical fiber connectors to allow optical fiber cables with plug ferrules of different internal and external diameters to be pushed into the sleeve and connected with precise core alignment keeping stable conditions. The sleeve has at least one slot extending part way along the length of the sleeve.
    Type: Application
    Filed: September 4, 2001
    Publication date: March 6, 2003
    Inventor: Ken Saitoh
  • Patent number: 6166977
    Abstract: A dynamic random access memory device having a number of sense amplifier banks (404a-404h) is disclosed. Each sense amplifier bank (404a-404h) has an associated memory array (402a-402h) and supply switch (406a-406h). In a given sense operation, data signals are coupled from a memory array (402a-402h) to its associated sense amplifier bank (404a-404h). Selection of the memory array (402a-402h) is determined by address signals (MS0-MS7). The supply switches (406a-406h) provide a sense amplifier supply voltage at a supply node (708) of its associated sense amplifier bank (404a-404h). At the initial portion of a sense operation, the supply switch (406a-406h) couples the high power supply voltage (VDD) to its associated supply node (708). After a predetermined time period, the supply switch couples a reduced array voltage (VDL) to its associated supply node (708). The switching operation is determined by an overdrive signal (SAOV).
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: December 26, 2000
    Assignee: Texas Instruments Incorporated
    Inventors: Ken Saitoh, Shoji Wada
  • Patent number: 5831925
    Abstract: A memory circuit includes a bond option circuit 106 having an input and an output, and row control circuitry 100 coupled to the output of the bond option circuit, the row control circuitry including address terminals, A12 and A13. The memory circuit also includes column control circuitry 102 coupled to the output of the bond option circuit, the column control circuitry 102 also including address terminals, A12 and A13. A memory cell array is coupled to the row control and column control circuitry and is arranged in a first plurality of banks of memory cells, the banks being selectable by a combination of address signals on the address terminals of the row control and column control circuitry. In response to a first signal at the input of the bond option circuit 106, the bond option circuit produces a second signal at the output of the bond option circuit that is coupled to the row control 100 and column control 102 circuitry.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: November 3, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: David R. Brown, Shoji Wada, Kazuya Ito, Yasuhito Ichimura, Ken Saitoh
  • Patent number: 5768214
    Abstract: A semiconductor memory device in which erroneous operation with respect to undesired level changes of the input address signal is prevented, and appropriate operation of the main amplifier is ensured. The semiconductor memory device has a main amplifier activating pulse generator 112' which includes response sensitivity reduction circuit 10, response sensitivity selector 12, and main amplifier activating pulse generator 14. The response sensitivity reduction circuit 10 can reduce the response sensitivity or input sensitivity of the circuit 112' with respect to an input address transition detection pulse ATD. The response sensitivity selector 12 selects either a first input terminal A1 or a second input terminal A2, depending on the output state of the main amplifier activating pulse generator 14.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: June 16, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: Ken Saitoh, Shunichi Sukegawa, Tadashi Tachibana, Makoto Saeki, Yukihide Suzuki