A 12.5-Gb/s near-GND transceiver for wire-line UHD video interfaces

This paper demonstrates a 12.5-Gb/s complete transceiver with near-ground and voltage-mode signaling. The output stage of the transmitter has two types of equalization methods: 2-tap FIR, AC-coupled equalization. The receiver equalizes the attenuation of the cable with a continuous time linear equalizer which includes a level-up shifter for receiving near-ground input signal. A dual-loop clock and data recovery circuit using a bang-bang phase detector is implemented for a receiver clock generation. The test-chips are fabricated in a 45-nm CMOS technology, and successfully perform data communication through -27 dB loss video cables. The entire transmitter and receiver test-chips respectively consume 92 mW and 138 mW from a 1.2 V supply while operating at 12.5 Gb/s.