A New Analog Buffer Using Low-Temperature Polysilicon Thin-Film Transistors for Active-Matrix Displays

Author

Pappas, Ilias ; Siskos, Stilianos ; Dimitriadis, Charalambos A.

Author_Institution

Dept. of Phys., Aristotle Univ. of Thessaloniki

Volume

54

Issue

2

fYear

2007

Firstpage

219

Lastpage

224

Abstract

In this paper, a new source-follower-type analog buffer for active-matrix displays, designed by using low-temperature polysilicon thin-film transistors (TFTs), is proposed. The buffer, consisting of five n-type polysilicon TFTs, one bias voltage, and an additional control signal, exhibits high immunity to threshold voltage and mobility variations. The functionality of the proposed buffer was verified by HSPICE simulations. In order to obtain realistic simulations, the TFT model parameters used for the simulations were extracted from fabricated TFTs using the Silvaco tools (ATLAS). The proposed buffer has 7-bit output voltage with the dynamic output voltage range of 7.5 V ranging from 2.5 to 10 V and with resolution up to 0.03 V

Keywords

analogue circuits; buffer circuits; display devices; low-temperature techniques; thin film transistors; 2.5 to 10 V; HSPICE simulations; Silvaco tools; active-matrix displays; bias voltage; control signal; low-temperature polysilicon thin-film transistors; n-type polysilicon TFT; source-follower-type analog buffer; Active matrix liquid crystal displays; Active matrix technology; Circuits; Computer displays; Liquid crystal displays; MOSFETs; Substrates; Thin film transistors; Threshold voltage; Voltage control; Active-matrix displays (AMDs); analog buffer; polysilicon thin-film transistors (TFTs);

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2006.888720

Filename

4067198