A 10-bit CMOS Digital-to-Analog Converter with Compact Size for Display Applications
- Authors
- Kim, Mungyu; Chung, Hoon-Ju; Jang, Young-Chan
- Issue Date
- Jun-2014
- Publisher
- IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
- Keywords
- digital-to-analog converter; resistor string; logarithmic time interpolator; low-pass filter; decoder
- Citation
- IEICE TRANSACTIONS ON ELECTRONICS, v.E97C, no.6, pp.519 - 525
- Journal Title
- IEICE TRANSACTIONS ON ELECTRONICS
- Volume
- E97C
- Number
- 6
- Start Page
- 519
- End Page
- 525
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/2039
- DOI
- 10.1587/transele.E97.C.519
- ISSN
- 1745-1353
- Abstract
- A 10-bit digital-to-analog converter (DAC) with a small area is proposed for data-driver integrated circuits of active-matrix liquid crystal display systems. The 10-bit DAC consists of a 7-bit resistor string, a 7-bit two-step decoder, a 2-bit logarithmic time interpolator, and a buffer amplifier. The proposed logarithmic time interpolation is achieved by controlling the charging time of a first-order low-pass filter composed of a resistor and a capacitor. The 7-bit two-step decoder that follows the 7-bit resistor string outputs an analog signal of the stepped wave with two voltage levels using the additional 1-bit digital code for the logarithmic time interpolation. The proposed 10-bit DAC is implemented using a 0.35-mu m CMOS process and its supply voltage is scalable from 3.3 V to 5.0 V. The area of the proposed 10-bit logarithmic time interpolation DAC occupies 57% of that of the conventional 10-bit resistor-string DAC. The DNL and INL of the implemented 10-bit DAC are +0.291-0.30 and +0.47/-0.36 LSB, respectively.
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