A wideband CMOS current-mode operational amplifier and its use for band-pass filter realization

Altun M., Kuntman H.

International Conference on Applied Electronics, Pilsen, Çek Cumhuriyeti, 6 - 07 Eylül 2006, ss.3-6 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/ae.2006.4382949
  • Basıldığı Şehir: Pilsen
  • Basıldığı Ülke: Çek Cumhuriyeti
  • Sayfa Sayıları: ss.3-6
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

In this paper, a CMOS current-mode operational amplifier (COA) based on a novel, class A input stage and a folded-cascode output stage is presented. The amplifier provides a 95 dB DC gain and a gain-bandwidth product exceeding 200 MHz. The COA is operated under +/-1.5 V voltage supplies and designed with 0.35-mu m CMOS process. Additionally, COA-based band-pass filter is realized. In a multiple feedback band-pass filter topology, COA can be used instead of voltage amplifier to enhance the bandwidth of operation. The center frequency of the filter is 10 MHz.