대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

전류- 제어 CMOS operational transconductance amplifier

A Current-controlled CMOS operational transconductance amplifier

  • 정원섭 (청주대학교 반도체공학과) ;
  • 차형우 (청주대학교 반도체공학과) ;
  • 김홍배 (청주대학교 반도체공학과) ;
  • 노승룡 (서울시립대학교 전자공학과)
  • Chung, W.S. (Dept. of Semiconductor Eng. Chongju University) ;
  • Cha, H.W. (Dept. of Semiconductor Eng. Chongju University) ;
  • Kim, H.B. (Dept. of Semiconductor Eng. Chongju University) ;
  • Rho, S.R. (Dept. of Electronics Eng. Seoul City University)
  • 발행 : 1988.07.01
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초록

A current-controlled CMOS operational transconductance amplifier(OTA), whose transconductance is directly proportional to the DC bias current, has been developed for many electronic circuit applications. It features that its transconductance is insensitive to temperature unlike that of the bipolar OTA. This property makes it possible to use the proposed OTA as a basic buliding block in electrically variable circuit design. The SPICE simulation shows that the conversion sensitivity of the circuit is 44.62 mv /${\mu}A$ and the linearity error less than 0.54 % over a bias current range from 2 ${\mu}A$ to 120 ${\mu}A$ when the output is loaded with a 1${\Omega}$ resistor.

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