Patents by Inventor Roy Charles Reese

Roy Charles Reese 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).

  • Variable attenuator
    Patent number: 6339356
    Abstract: A variable attenuator formed from a combination of PIN diodes is provided. The PIN diodes may be coupled in a “T,” “p” or other appropriate configuration. At radio frequencies (RF), a PIN diode acts as a variable resistor with a resistance value based on the bias current of the PIN diode. To control the attenuation level of the variable attenuator, the bias current of the PIN diodes are selectively adjusted. Digital values relating to selected bias currents, and thus selected attenuation levels, are stored in a memory. These digital values are provided as control signals that set the bias current levels for the PIN diodes. The bias current levels control the attenuation level of the variable attenuator.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: January 15, 2002
    Assignee: ADC Telecommunications, Inc.
    Inventors: Earl A. Daughtry, Roy Charles Reese