Power Control Or Detection Circuit Patents (Class 379/395.01)
  • Subscriber circuit
    Patent number: 6310953
    Abstract: In a subscriber circuit implementing the analog system, the 2B1Q system and the ping-pong system, a signal processing unit is divided into a signal output unit for outputting a signal for transmission and a bias unit for providing a voltage, the signal output unit being implemented by an amplifier unit characterized by a low withstand voltage and a broadband characteristic, and the bias unit is implemented by an amplifier unit characterized by a high withstand voltage and a narrowband characteristic.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: October 30, 2001
    Assignee: Fujitsu Limited
    Inventors: Kazuhiro Yoshida, Kenji Takato