The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Design of OTA Circuit for Current-mode FIR Filter

Current-mode FIR Filter 동작을 위한 OTA 회로 설계

  • 여성대 (서울과학기술대학교 NID융합기술대학원) ;
  • 조태일 (서울과학기술대학교 NID융합기술대학원) ;
  • 신영철 (서울과학기술대학교 NID융합기술대학원) ;
  • 김성권 (서울과학기술대학교 NID융합기술대학원)
  • Received : 2016.07.07
  • Accepted : 2016.07.24
  • Published : 2016.07.31
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Abstract

In this paper, we suggest operational trans-conductance amplifier(OTA) for current-mode FIR filter that can be used in a digital circuit system requiring high operating frequency and low power consumption. The current-mode signal processing is one of the very innovative design method for a low power consumption system with high operating frequency because it shows a constant power regardless of frequency. From the simulation result using 0.35um CMOS process, when Vdd is 2V, it is confirmed that the proposed circuit showed the dynamic range of the about 1V, about 50% of supply voltage and output current swing of about 0~200uA. Also, the power consumption was evaluated with about 21uW and the active size for an integration was measured with $71um{\times}166um$.

본 논문에서는 고속 동작과 저전력 동작을 요구하는 디지털 회로 시스템에 사용될 수 있는 Current-mode FIR Filter를 위한 OTA(:Operational Trans-conductance Amplifier) 회로를 제안한다. Current-mode 신호처리는 동작 주파수와 상관없이 일정한 전력을 유지하는 특징이 있기 때문에 고속 동작을 요구하는 디지털 회로 시스템의 저전력 동작에 매우 유용한 회로설계 기술이라고 할 수 있다. 0.35um CMOS 공정을 이용한 시뮬레이션 결과, Vdd=2V에서 전원 전압의 50%에 해당하는 약 1V의 Dynamic Range를 확보하였으며, 약 0~200uA의 출력전류를 확인하였다. 설계한 OTA 회로의 전력은 약 21uW가 계산되었으며, Active Layout 면적은 $71um{\times}166um$ 사이즈로 집적화에 유리할 것으로 기대된다.

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References

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