A Mobile OLED Source-Driver IC featuring Ultra-Compact 3-Stage-Cascaded 10-Bit DAC and 42V/μs-Slew-Rate True-DC-Interpolative Super-OTA Buffer
- Resource Type
- Conference
- Authors
- Shin, Seunghwa; Kang, Gyeong-Gu; Lim, Gyu-Wan; Kim, Hyun-Sik
- Source
- 2023 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits) VLSI Technology and Circuits (VLSI Technology and Circuits), 2023 IEEE Symposium on. :1-2 Jun, 2023
- Subject
- Components, Circuits, Devices and Systems
Interpolation
Merging
Modulation
Switches
Very large scale integration
Organic light emitting diodes
- Language
- ISSN
- 2158-9682
This paper presents a source-driver IC for mobile OLED displays. The proposed 3-stage-cascaded 10-bit DAC fully exploits compactness benefit of multi-step interpolation. The overlap-switch merging (OSM) method allows for a 47% size-reduction in the 2-output R-DAC. The SAR-interpolating SC (SI-SC) DAC with bit-adaptive switch size (BASS) modulation is designed to obtain 2-output without switching errors. The proposed super-OTA buffer not only offers a fast slew-rate, but it also performs accurate 1-bit true-DC interpolation The SD-IC fabricated in 180nm shows the smallest area $(132.4 \times 16.7~\mu \mathrm{m}^{2}/\mathrm{Ch})$ and the best slew-rate FoM (2470.6) reported to date.