Patents by Inventor Masaki Tagai

Masaki Tagai 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).

  • Transistor oscillating circuit having low change in oscillating frequency due to change in power supply voltage
    Patent number: 7449971
    Abstract: Provided is a transistor oscillating circuit capable of reducing change in oscillating frequency due to change in power supply voltage by improving a base bias circuit of an oscillating transistor 3. In a transistor oscillating circuit, an oscillating circuit 3 of which an emitter is connected to ground through an emitter load resistor 8, a resonance circuit 2 is connected between a base and the ground, and a collector is connected to a power supply terminal, is included, base bias resistors 9 and 10 are connected between the base and the collector and between the base and the emitter of the oscillating transistor 3, and a capacitor 7 is connected between the emitter of the oscillating transistor 3 and AC-ground.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: November 11, 2008
    Assignee: ALPS Electric Co., Ltd.
    Inventors: Hiroki Kobayashi, Masaki Tagai, Ryutaro Makita, Toru Kozu
  • Transistor oscillating circuit having low change in oscillating frequency due to change in power supply voltage
    Publication number: 20060279369
    Abstract: Provided is a transistor oscillating circuit capable of reducing change in oscillating frequency due to change in power supply voltage by improving a base bias circuit of an oscillating transistor 3. In a transistor oscillating circuit, an oscillating circuit 3 of which an emitter is connected to ground through an emitter load resistor 8, a resonance circuit 2 is connected between a base and the ground, and a collector is connected to a power supply terminal, is included, base bias resistors 9 and 10 are connected between the base and the collector and between the base and the emitter of the oscillating transistor 3, and a capacitor 7 is connected between the emitter of the oscillating transistor 3 and AC-ground.
    Type: Application
    Filed: June 7, 2006
    Publication date: December 14, 2006
    Inventors: Hiroki Kobayashi, Masaki Tagai, Ryutaro Makita, Toru Kozu