A 10-b Two-Stage DAC with an Area-Efficient Multiple-Output Voltage Selector and a Linearity-Enhanced DAC-Embedded Op-Amp for LCD Column Driver ICs

作者：Lu Chih Wen^*; Hsiao Ching Min; Yin Ping Yeh

来源：IEEE Journal of Solid-State Circuits, 2013, 48(6): 1475-1486.

DOI：10.1109/JSSC.2013.2252525

• Buffer amplifier
• column driver
• digital-to-analog converter (DAC)
• liquid crystal driver (LCD)
• LCD driver
• op-amp
• resistor-string DAC (RDAC)
• voltage selector

This work proposes a 10-b two-stage DAC with an area-efficient multiple-output voltage selector and a linearity-enhanced DAC-embedded op-amp for LCD column driver ICs. The proposed voltage selector is divided into two stages, MSB and LSB decoders; this design requires fewer switches compared with tree-type voltage selectors, enabling a smaller die area. The proposed 6-b two-voltage selector occupies only 61% of the area needed for a 6-b tree-type two-voltage selector. This study also develops a generalized architecture for an area-efficient voltage selector for multiple outputs. To improve the linearity of the DAC-embedded op-amp, the differential pairs operate at the edge of the saturation region. The 10-b DAC prototypes were produced with 0.35-mu m/0.5-mu m CMOS technology with the worst DNL/INL being 0.44/0.58 LSB.

• 出版日期2013-6
• 单位清华大学