Patents by Inventor Minobu Okada

Minobu Okada 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).

  • Satellite broadcasting receiving tuner which inhibits interference caused by satellite broadcast signals having one octave higher frequency band
    Patent number: 6272312
    Abstract: A disturbance may be prevented from being caused in a satellite broadcasting signal of a reception target by a satellite broadcasting signal in which a frequency is higher by 1 octave.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: August 7, 2001
    Assignee: Alps Electric Co., Ltd.
    Inventors: Akira Takayama, Minobu Okada
  • Delayed automatic gain control circuit
    Patent number: 5884153
    Abstract: A delayed automatic gain control circuit using a simple delayed AGC voltage generation section and capable of fixing a start point of AGC in an RF amplification section at a predetermined received signal level without performing a special adjusting operation even if there are variations in the characteristics of circuit sections. The delayed automatic gain control circuit has a tuner including the RF amplification section, an AGC voltage generation section for generating an AGC voltage dependent on an output signal from the tuner, and an AGC voltage setting section for converting the AGC voltage into a delayed AGC voltage which is supplied to the RF amplification section of the tuner. The AGC voltage setting section is formed by a resistor voltage divider for dividing a power supply voltage and a diode connected to one voltage dividing point of the resistor voltage divider to selectively supply the AGC control voltage to the voltage dividing point according to the level of the AGC voltage.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: March 16, 1999
    Assignee: Alps Electric Co., Ltd.
    Inventor: Minobu Okada