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A 10-bit CMOS DAC With Current Interpolated Gamma Correction for LCD Source Drivers

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2 Author(s)
Pang-Jung Liu ; Dept. of Electr. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan ; Chen, Y.-J.E.

This paper presents a compact 10-bit digital-to-analog converter (DAC) for LCD source drivers. The cyclic DAC architecture is used to reduce the area of LCD column drivers when compared to the use of conventional resistor-string DACs. The current interpolation technique is proposed to perform gamma correction after D/A conversion. The gamma correction circuit is shared by four DAC channels using the interleave technique. A prototype 10-bit DAC with gamma correction function is implemented in 0.35 μm CMOS technology and its average die size per channel is 0.053 mm2, which is smaller than those of the R-DACs with gamma correction function. The settling time of the 10-bit DAC is 1 μs, and the maximum INL and DNL are 2.13 least significant bit (LSB) and 1.30 LSB, respectively.

Published in:

Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:22 ,  Issue: 6 )

Date of Publication:

June 2012

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