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On the use of Nauta's transconductor in low-frequency CMOS g(m)-C bandpass filters

Publiceringsår: 2002
Språk: Engelska
Sidor: 114-124
Publikation/Tidskrift/Serie: IEEE Journal of Solid-State Circuits
Volym: 37
Nummer: 2
Dokumenttyp: Artikel i tidskrift
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


This paper discusses the use of a transconductor, first proposed by Nauta for high frequency applications, in low frequency CMOS g(m) - C bandpass filters. The behavior of the transconductor is examined in detail, showing that the robust implementation of higher-order low-voltage filters is possible for center frequencies in the lower megahertz region. The experimental results are presented of the realization of two prototypes, a 0.6-mum CMOS 18th-order real bandpass filter and a 0.35-mum CMOS 7th-order complex (14th-order bandpass) filter, both with a center frequency of 3 MHz and a passband of 1 MHz. These filters comply with the specifications for the channel-select stage of the Bluetooth short-range radio receiver.


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • polyphase
  • filters
  • non-quasi-static phenomena
  • non-quasi-static MOS models
  • g(m)-C filters
  • complex filters
  • bandpass filters
  • CMOS


  • ISSN: 0018-9200

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