Patents by Inventor Naotaka Satoh

Naotaka Satoh 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).

  • Apparatus for optimizing the performance of a power amplifier
    Patent number: 5880635
    Abstract: The performance of a power amplifier used in a signal transmitter, such as in a communication system (e.g., a personal communication system PCS), is optimized by coupling a controllable impedance to the output impedance of the power amplifier. The power output level of the amplifier, which is variable over a range from a minimum level to a maximum level and which is accompanied by a corresponding amplifier output impedance change, is detected, as is the operating power supplied to the amplifier. The controllable impedance that is coupled to the amplifier output is controlled as a function of the detected amplifier power output level and sensed operating power.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: March 9, 1999
    Assignees: Sony Corporation, Sony Electronics, Inc.
    Inventor: Naotaka Satoh