대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

ULTRA LOW-POWER AND HIGH dB-LINEAR CMOS EXPONENTIAL VOLTAGE-MODE CIRCUIT

  • Duong Quoc-Hoang (RFME lab, Information and Communications University.) ;
  • Lee Sang-Gug (RFME lab, Information and Communications University.)
  • 발행 : 2004.08.01
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초록

This paper proposed an ultra low-power CMOS exponential voltage-mode circuit using the Pseudo-exponential function for realizing the exponential characteristics. The proposed circuit provides high dB-linear output voltage range at low-voltage applications. In a $0.25\;\mu m$ CMOS process, the simulations show more than 35 dB output voltage range and 26 dB with the linearity error less than $\pm0.5\;dB.$ The average current consumption is less than 80 uA. The proposed circuit can be used for the design of an extremely low-power variable gain amplifier (VGA) and automatic gain control (AGC).

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