Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Highly Accurate BiCMOS Cascode Current Mirror for Wide Output Voltage Range

광범위 출력전압을 위한 고정밀 BiCMOS cascode 전류미러

  • Yang, Byung-Do (School of Electrical and Computer Engineering, Chungbuk National University)
  • 양병도 (충북대학교 전기전자컴퓨터공학부)
  • Published : 2008.03.25
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Abstract

A highly accurate wide swing BiCMOS cascode current mirror is proposed. It uses the base-current compensated BJT current mirror. It increases both output impedance and output voltage range by using the npn-NMOS cascode instead of the NMOS-NMOS cascode. The npn transistor copies the input current and the NMOS transistor increases the output impedance for the accurate current mirroring. The proposed current mirror achieves highly constant current for wide output voltage range. Simulation results were verified with measurements performed on a fabricated chip using a 5/16V 0.5um BCD process. It has only $-2.5%{\sim}1.0%$ current error for $0.3V{\sim}16V$ output voltage range.

본 논문에서는 광범위 출력전압을 위한 고정밀 BiCMOS cascode 전류미러를 제안하였다. 제안한 전류미러는 베이스 전류에러를 보상하는 BJT 전류미러를 기본으로 하고 있다. NMOS-NMOS cascode 구조 대신에 npn-NMOS cascode 구조를 사용하여, 출력저항과 출력전압 범위를 증가시켰다. npn 전류 복사 트랜지스터는 입력전류를 출력전류로 복사하고, NMOS 트랜지스터는 출력저항을 증가시켜 정밀한 전류 복사를 가능케 한다. 제안한 전류미러는 광범위 출력전압에서 정밀하게 전류를 복사한다. 5V/16V 0.5um BCD 공정을 이용하여 제작한 칩을 측정하여 검증하였고, $0.3V{\sim}16V$의 출력전압 범위에서 전류 에러는 $-2.5%{\sim}1.0%$이다.

Keywords

References

  1. R. J. Baker, CMOS Circuit Design, Layout, and Simulation, 2nd ed. New York: John Wiley and Sons, 2005
  2. A.S.Sedra and K.C.Smith, Microelectronic Circuits, 5th ed. New York: Oxford University Press, 2004
  3. B.Razavi, Design of Analog CMOS Integrated Circuits, New York: McGraw-Hill, 2001
  4. A.K.Gupta, J.W.Haslett, and F.N.Trofimenkoff, "BiCMOS Adjustable Linear Current Mirror", IEEE Journal of Solid-State Circuits, Vol. 32, No. 1, pp. 130-134, Jan. 1997 https://doi.org/10.1109/4.553194
  5. B.A.Minch, "Low-Voltage Wilson Current Mirrors in CMOS", IEEE International Symposium on Circuits and Systems, pp. 2220-2223, May 2007
  6. Ali Meaamar and Masuri Othman, "Low- Voltage, High-Performance Current Mirror Circuit Techniques", IEEE International Conference on Semiconductor Electronics, pp. 661-665, Oct. 2006
  7. Laura Sanchez-Gonzalez and Gladys Ducoudray -Acevedo, "High Accuracy Self-Biasing Cascode Current Mirror", IEEE International Symposium on Circuits and Systems, Vol. 1, pp. 465-468, Aug. 2006