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An adaptive equalizer with the capacitance multiplication for DisplayPort main link has been proposed. The proposed equalizing filter is based on Miller's theorem and composed of metal-insulator-metal capacitors and a sub-amplifier. The active source degeneration capacitor achieves low cost and area saving with the capacitance multiplication. The equalizer satisfies the specification of DisplayPort version 1.1a. The measured eye widths of 2.7 Gb/s data are 0.6 and 0.5 UI for 5 and 8 m cables, respec- tively. The core area is 286 × 380 μm2 and power consumption is 22.3 mW at 2.7 Gb/s at 1.8 V.