Self-Biasing High Precision CMOS Current Subtractor for Current-Mode Circuits


Arslan E.

ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING, cilt.13, sa.4, ss.19-24, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Konu: 4
  • Basım Tarihi: 2013
  • Doi Numarası: 10.4316/aece.2013.04004
  • Dergi Adı: ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING
  • Sayfa Sayıları: ss.19-24

Özet

In this study, a novel, differential pair based, high performance and high bandwidth current subtractor is proposed. Very low equivalent impedances are obtained at input ports n and p by using source follower transistors. Furthermore, the proposed circuit is self-biasing which makes it resistant to process, supply voltage and temperature variations. The proposed current subtractor can be used as an input stage for current-mode active circuits like current differencing buffered amplifier (CDBA), operational transresistance amplifier (OTRA) and current differencing transconductance amplifier (CDTA) which employ current subtractors. A numeric figure-of-merit is defined and it is used to demonstrate the superior performance of the proposed circuit.