A wide tunable bandpass filter design based on CMOS active inductor

Sunca A., ÇİÇEKOĞLU M. O., DÜNDAR G.

8th Conference on Ph.D. Research in Microelectronics and Electronics, PRIME 2012, Aachen, Almanya, 12 - 15 Haziran 2012, ss.203-206, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Aachen
  • Basıldığı Ülke: Almanya
  • Sayfa Sayıları: ss.203-206
  • Anahtar Kelimeler: Active inductor, Bandpass filter, Inductance simulation, Wide tuning
  • Boğaziçi Üniversitesi Adresli: Evet

Özet

In this paper, a wide tunable bandpass filter based on a proposed active inductor topology is presented. Based on the proposed structure, a prototype Q-enhanced second-order filter is designed and simulated in a 0.18μm CMOS process. A center frequency tuning range from 375 MHz to 2 GHz with a quality factor of at least 40 (phase errors less than 1 degree) is achieved thanks to a new technique of frequency tuning. Having a fine and wide range control of its inductance value, the active inductor topology avoids the usage of external capacitances or on-chip varactors for the fine/coarse adjustment of the operating frequency under a fixed nominal biasing condition. The filter consumes 5mW under a supply voltage of 1.8V, including input and output buffers.