A 0.7pJ/bit 2Gbps self-synchronous serial link receiver using gated-ring oscillator for inductive coupling communication

A low-energy self-synchronous serial link receiver for inductive coupling communication is implemented in 130nm CMOS process. The gated-ring oscillator (GRO) is proposed to combine three key building blocks (CDR, phase interpolator and PLL) used in conventional receiver resulting in energy consumption reduction. In addition, the start-up time and settling time for clock recovery can be significantly reduced due to the large loop bandwidth characteristics of the proposed GRO. As a result, the proposed serial link receiver achieves 2Gbps data rate and sub-20ns settling time while consuming 0.7pJ/bit from the 1.2V supply.