Invention Grant
US06483383B2 Current controlled CMOS transconductive amplifier arrangement 有权
电流控制CMOS跨导放大器布置

  • Patent Title: Current controlled CMOS transconductive amplifier arrangement
  • Patent Title (中): 电流控制CMOS跨导放大器布置
  • Application No.: US10026818
    Application Date: 2001-12-27
  • Publication No.: US06483383B2
    Publication Date: 2002-11-19
  • Inventor: Kao-Pin Wu
  • Applicant: Kao-Pin Wu
  • Priority: TW90200273U 20010105
  • Main IPC: H03F345
  • IPC: H03F345
Current controlled CMOS transconductive amplifier arrangement
Abstract:
A current controlled complementary metal-oxide-semiconductor transconductive amplifier arrangement includes a first transconductive amplifier and a control circuit to control the transconductance of the first transconductive amplifier. The control circuit contains a second transconductive amplifier and an error amplifier formed in a feedback circuit, a current source to provide a current flowing through a resistor so as to supply an input voltage for the second transconductive amplifier, and a second current source and the output of the second transconductive amplifier coupled to the positive input of the error amplifier such that the transconductance of the second transconductive amplifier is in a linear relation with its bias current. The bias current of the first transconductive amplifier is mirrored from the bias current of the second transconductive amplifier by a current mirror, thus the transconductance of the first transconductive amplifier is linearly current controlled.
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