Tunable linear CMOS current mirror


Zeki A., Toker A.

ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, vol.50, no.3, pp.261-269, 2007 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 3
  • Publication Date: 2007
  • Doi Number: 10.1007/s10470-007-9030-3
  • Title of Journal : ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
  • Page Numbers: pp.261-269

Abstract

Based on triode MOSFETs as tunable devices, a tunable linear current mirror is proposed, whose current gain is tunable over a wide range. Simulations show that, total harmonic distortion on the output current is within 2% for a tuning range of almost five octaves. Although the structure is in the form of an active-input current mirror, keeping the tuned MOSFETs in triode region significantly relaxes the stability problems of an active-input current mirror. This issue is revealed by theoretical analyses and further simulations are included for demonstration. An application example is also supplied.