($V_{th}$ Variation Insensitive Current Source and Current Mirror Circuits using poly-Si TFTs

  • Choi, Woo-Jae (Division of Electrical and Computer Engineering, Hanyang University) ;
  • Kim, Seong-Joong (Division of Electrical and Computer Engineering, Hanyang University) ;
  • Sung, Yoo-Chang (Division of Electrical and Computer Engineering, Hanyang University) ;
  • Kim, In-Hwan (Division of Electrical and Computer Engineering, Hanyang University) ;
  • Sik, Yoo-Chang (Division of Electrical and Computer Engineering, Hanyang University) ;
  • Kwon, Oh-Kyong (Division of Electrical and Computer Engineering, Hanyang University)
  • Published : 2003.07.09

Abstract

We proposed new current source and mirror circuits insensitive to $V_{th}$ variation of poly-Si TFTs. The proposed circuits have been verified by SPICE simulation using poly-Si TFT model. The error currents of the proposed current source and current mirror circuits caused by $V_{th}$ variation reduced less than 6.6% and 4.5% of that of conventional ones, respectively.

Keywords