Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Design of A 10MHz Bandpass Filter Using Grounding and Floating CDTA Active Inductors

그라운딩과 폴로팅 CDTA 능동인덕터를 사용한 10MHz 대역통과필터 설계

  • Bang, Junho (Department of IT Applied System Engineering, Smart Grid Research Center, Semiconductor Design Education Center, Chonbuk National University) ;
  • Ryu, In-Ho (Department of IT Applied System Engineering, Smart Grid Research Center, Semiconductor Design Education Center, Chonbuk National University)
  • 방준호 (전북대학교 IT응용시스템공학과, 스마트그리드연구센터, 반도체설계교육센터) ;
  • 유인호 (전북대학교 IT응용시스템공학과, 스마트그리드연구센터, 반도체설계교육센터)
  • Received : 2014.10.21
  • Accepted : 2014.11.06
  • Published : 2014.11.30
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Abstract

This paper presents a bandpass filter using a current differencing transconductance amplifier (CDTA)s for application to low-voltage and low-power analog signal processing systems. The presented filter employs grounding and floating active inductors, which are composed of two or three CDTAs, and is capable of realizing all the standard functions of the filter without requiring any component matching criteria or extra active components. The HSPICE simulation result of the designed active bandpass filter showed that it had a 10MHz center frequency with -2.5dB attenuated bandwidth from 9.5 MHz to 10.5 MHz, and -50dB from 8 MHz to 17 MHz.

본 논문에서는 저전압, 저전력 아날로그 신호처리 시스템에 활용할 수 있도록 전류 차동 트랜스컨덕턴스 증폭기(CDTA)를 사용하여 대역통과 필터를 설계하였다. 대역통과 필터는 그라운딩 인덕터와 플로팅 능동 인덕터를 사용하여 설계하였고, 설계된 능동 인덕터는 각각 두 개 또는 세 개의 CDTA를 활용하여 구성하였다. 본 논문에서 설계된 능동 인덕터를 활용하여 대역통과 필터를 구성할 때, 소자 값 들을 조정하기 위한 외부의 추가적인 정합회로의 필요 없이 필터를 구현할 수 있다는 장점이 있다. 설계된 능동 대역통과 필터 특성의 검증은 HSPICE 시뮬레이션 프로그램을 활용하였다. 시뮬레이션결과, 설계된 필터는 10MHz의 중심주파수, 통과대역에서는 -2.5dB의 감쇄율을 가진 9.5~10.5MHz의 대역폭을 얻을 수 있었으며, 차단대역에서는 8MHz이하와 17MHz이상에서 -50dB의 감쇄율을 가진 대역통과 특성을 얻을 수 있다.

Keywords

References

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