scholarly journals An Area-Efficient 10-Bit Buffer-Reused DAC for AMOLED Column Driver ICs

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 208 ◽  
Author(s):  
Ming Xia ◽  
Zunkai Huang ◽  
Li Tian ◽  
Ning Wang ◽  
Yongxin Zhu ◽  
...  

In this paper, we proposed an area-efficient 10-bit digital-to-analog converter (DAC) with buffer-reusing method to dramatically relief the severe area exploding issue in high-definition active-matrix organic light-emitting diode (AMOLED) driver integrated circuits (ICs). In our design, we implement the functionalities of a large number of switches and capacitors in conventional DAC by a compact internal buffer. Furthermore, we minimize the buffer capacity requirement by elaborately reusing the indispensable output buffer in the typical column driver. In this way, we can cut down nearly a half of the decoder-switches and simultaneously reduce the capacitor size from 8 C to 3 C without designing an intricate and power-consuming amplifier separately. A prototype 6-channel column driver employing the proposed buffer-reused DAC was fabricated by 0.35 μm 2P3M BCD (Bipolar, CMOS, DMOS) process and its effective layout area per channel is 0.0429 mm2, which is 42.8% smaller than that of the conventional 10-bit R-C DAC. Besides, the measured differential nonlinearity (DNL) and integral nonlinearity (INL) are 0.514 LSB/0.631 LSB, respectively and the maximum value of inter-channel deviation voltage output (DVO) is 3.25 mV. The settling time within 5.6 μs is readily achieved under 1.5 kΩ-resistance and 100 pF-capacitance load. Measurement results indicate that the proposed buffer-reused DAC can successfully minimize the die area while maintaining other required performances.

1999 ◽  
Vol 30 (1) ◽  
pp. 438 ◽  
Author(s):  
R. M. A. Dawson ◽  
Z. Shen ◽  
D. A. Furst ◽  
S. Connor ◽  
J. Hsu ◽  
...  

Nano Letters ◽  
2011 ◽  
Vol 11 (11) ◽  
pp. 4852-4858 ◽  
Author(s):  
Jialu Zhang ◽  
Yue Fu ◽  
Chuan Wang ◽  
Po-Chiang Chen ◽  
Zhiwei Liu ◽  
...  

2011 ◽  
Author(s):  
David A. Fellowes ◽  
Michael V. Wood ◽  
Arthur R. Hastings, Jr. ◽  
Russell S. Draper ◽  
Amalkumar Ghosh ◽  
...  

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