A 55.1 mW 1.62-to-8.1 Gb/s Video Interface Receiver Generating up to 680 MHz Stream Clock Over 20 dB Loss Channel

Abstract

A 1.62-to-8.1 Gb/s video interface receiver with an adaptive equalizer and a stream clock generator (SCG) is proposed. The adaptation logic is achieved by an edge-based adaptation and it controls the continuous-time linear equalizer ac boost. Using the adaptation logic, the minimum BER point is selected for several cables. The SCG consists of a phase-switching fractional divider and a delta–sigma modulator. The dividing factor is determined by the display resolution and the SCG operates up to 680 MHz which is the 4K UHD pixel frequency. The proposed receiver is fabricated in 65-nm CMOS technology and occupies an active area of 0.282 mm2. The measured BER is less than $10^{-12}$ with a 20-ft-long video cable, whose insertion loss at 4.05 GHz is 20 dB. The receiver consumes 55.1 mW at the data rate of 8.1 Gb/s.