Patents by Inventor Noboru Inanami

Noboru Inanami 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).

  • Oscillator having switching capacitors and phase-locked loop employing same
    Patent number: 5793257
    Abstract: A voltage-controlled oscillator has first and second switched capacitor filters, an operational amplifier, and a comparator. The first switched capacitor filter is controlled by a control clock signal to supply a positive current depending on an input voltage, and the second switched capacitor filter is controlled by the control clock signal to supply a negative current depending on the input voltage. The operational amplifier has an input terminal alternately connectable to the first and second switched capacitor filters by a first switch which can be rendered conductive in synchronism with an output clock signal, and another input terminal for being supplied with a constant voltage.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: August 11, 1998
    Assignee: Fujitsu Limited
    Inventors: Noboru Inanami, Yuji Segawa, Kunihiko Gotoh