Patents by Inventor Toshiro Imi

Toshiro Imi 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).

  • Charge pump voltage converter
    Patent number: 5635776
    Abstract: A charge pump circuit which has a simple circuit configuration yet can boost the power source voltage 4 or 8 times. The + side electrode of a capacitor C1 is connected to an input terminal 10 via a diode D1; the - side electrode is connected to input terminal 10 via a switch S1 and is also connected to ground potential via a switch S2. The + side electrode of a capacitor C2 is connected to the + side electrode of capacitor C1 via a diode D2; the - side electrode is connected to the + side electrode of capacitor C1 via a switch S3 and is also connected to ground potential via a switch S4. Switching control signals PA, PB, PC, PD with the prescribed frequencies and phase are provided to switches S1, S2, S3, S4 from switch control circuit (14).
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: June 3, 1997
    Assignee: Texas Instruments Incorporated
    Inventor: Toshiro Imi