A 2.1Gbps 12-channel transmitter with phase emphasis embedded serializer for UHD intra-panel interface

Abstract

A 2.1Gbps 12-channel transmitter with phase emphasis embedded serializer for an intra-panel interface is presented. Phase emphasis is introduced into the final 2:1 stage of a 20:1 serializer to reduce the data-dependent jitter without increasing IO capacitance, by making the transition timing depend on previous data. This is combined with LVDS channel drivers which control the common-mode voltage and swing of the output signal over a wide range to match the condition of each channel. Using both phase and amplitude emphasis, the transmitter can compensate for channel losses exceeding 10dB, and eye jitter is reduced by 38%: phase emphasis is responsible for about half of this reduction. Fabricated in 28nm CMOS, the transmitter occupies 1.35mm2. The proposed transmitter is verified with 55-inch UHD (3840×2160) resolution TFT-LCD intra-panel interface.