A low-voltage, low-power CMOS fifth-order elliptic GM-C filter for baseband mobile, wireless communication

Chung Chih Hung, Kari A.I. Halonen, Mohammed Ismail, Veikko Porra, Akira Hyogo

Research output: Contribution to journalArticle

71 Citations (Scopus)


In this paper, the design and performance of a rail-to-rail low-voltage CMOS fifth-order elliptic low-pass GM-C filter for baseband mobile communication are presented. The operational transconductance amplifier (OTA) used in this filter is a low-voltage rail-to-rail voltage-to-current converter (V-I converter). In this V-I converter, an N-type V-I converter cell is connected in parallel with its counterpart, a P-type V-I converter cell, to achieve common-mode (CM) rail-to-rail operation. Two maximum-current selecting circuits and an output current subtraction circuit are utilized to generate constant-gm output currents for this OTA. This fifth-order elliptic low-pass GM-C filter operates at a supply voltage of 3 V and has a cutoff frequency of 280 to 405 KHz. It provides up to 700 mVpp output with 1% total harmonic distortion (THD), dissipates 2.48 mW at Vcm - 1.5 V, and occupies 1.62 mm2 in a 1.2-μm CMOS technology.

Original languageEnglish
Pages (from-to)584-593
Number of pages10
JournalIEEE Transactions on Circuits and Systems for Video Technology
Issue number4
Publication statusPublished - 1 Dec 1997



  • Analog VLSI
  • Baseband circuits
  • Communication circuits
  • Low power CMOS
  • RF circuits
  • Transceiver

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