Journal of System Simulation ›› 2016, Vol. 28 ›› Issue (2): 383-387.

Previous Articles     Next Articles

Research on Switched Current Mirror Mismatch and Simulation

Guo Jierong1,2, He Yigang1, Liu Changqing1,2   

  1. 1. School of Electrical Engineering and Automation Postdoctoral Mobile Research Station, Hefei University of Technology, Hefei 230009, China;
    2. Key Lab of Integrated with Optoelectronic Information and Optical Fabrication in Hunan, Changde 415000, China
  • Received:2014-10-20 Revised:2014-12-25 Online:2016-02-08 Published:2020-08-17

Abstract: Typical sources of switched current mirror mismatch were discussed. The most important three parameter of mismatch: transconductance, threshold voltage and the sub threshold slope were analyzed, due to the switch current circuit adopts the width to length ratio characteristic for calibration design. SPICE model using Hspice platform and 0.18 um BSIM3_V3.1 were proposed for circuit simulation. The simulation and analysis of mismatch were executed based on two kinds of operating rules of weak inversion and strong inversion. The compensation ability for mismatch was provided by floating gate switch current mirror which was also verified by simulation. Analysis and simulation results of two kinds of operation rules were also given.

Key words: current mirror, mismatch, current model, weak inversion, strong inversion

CLC Number: