Gyeong-Gu Kang, Seok-Tae Koh, W. Jang, Ji-Hun Lee, Seongjoo Lee, O. Kwon, K. Jung, Hyunsik Kim
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A 12-Bit Mobile OLED/μLED Display Driver IC with Cascaded Loading-Free Capacitive Interpolation DAC and 6.24V/μs-Slew-Rate Buffer Amplifier
This paper presents an OLED/μLED display driver IC with cascaded loading-free capacitive interpolation (LFCI) DAC and a high-slew buffer amplifier. The 12-bit color-depth is realized by a combination of 7-bit R-DAC and proposed 5-bit LFCI DAC while occupying only 295×17μm2, which is ×2 reduction compared to the state-of-the-art. In-pixel MSB-conversion is also presented to reduce chip size further. 5V amplifier offers a slew-rate of 6.24V/μs at 80pF with a static current of 2μA. The chip fabricated in 180-nm achieved the measured 0.43LSB (DNL), 0.95LSB (INL), and 7.9mV (DVO).
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