A 10-bit DAC with offset-adjustable op-amp for LCD column driver applications

Chih Wen Lu, Ching Min Hsiao, Ping Yeh Yin, Yo Sheng Lin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper proposes a 10-bit digital-to-analog converter (DAC) consisting of a 6-bit resistive DAC (RDAC) and a 4-bit offset-adjustable op-amp for LCD column driver applications. The 6-bit RDAC selects only one voltage from the global resistor string before transmitting it to the op-amp. The op-amp implements 4-bit interpolation by adjusting the offset voltage. The maximal differential nonlinearity and integral nonlinearity of the proposed converter were measured at 0.8 LSB and 0.81 LSB, respectively, using 1LSB equal to 2 mV. The proposed 10-bit DAC occupies only 70 % of the space required for a conventional 8-bit RDAC.

Original languageEnglish
Pages (from-to)651-660
Number of pages10
JournalAnalog Integrated Circuits and Signal Processing
Volume74
Issue number3
DOIs
StatePublished - Mar 2013

Keywords

  • Column driver
  • DAC
  • LCD
  • Op-Amp
  • RDAC

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