The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design of Low Voltage Transconductor for Fully Differential Gm-C Filter

완전 차동 Gm-C 필터를 위한 저전압 트랜스컨덕터 설계

  • 최석우 (전북대학교 공과대학 전자정보공학부) ;
  • 김선홍 (삼성전기 WS모듈사업팀) ;
  • 윤창훈 (우석대학교 과학기술대학 전기공학과)
  • Published : 2007.02.01
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Abstract

A fully differential transconductor using the series composite transistor is proposed. Simulation results show that THD is less than 1.2% for the differential input signal of up to $1.5V_{p-p}$ when the input signal frequency is 10MHz. i he proposed transconductor is used to design a third-order elliptic Gm-C lowpass filter with 138kHz cutoff frequency for ADSL Tx filter. The design procedure is based on signal flow graph(SFG) of a doubly-terminated LC ladder filter by means of fully differential transconductors and capacitors. The filter is fabricated and measured with a $0.35{\mu}m$ CMOS process.

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References

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