A 9.6-Gb/s 1.22-mW/Gb/s Data-Jitter Mixing Forwarded-Clock Receiver in 65-nm CMOS

Abstract

In this paper, a data-jitter mixing (DJM) forwardedclock receiver is proposed that achieves high jitter correlation between data and a clock for high speed and small power consumption. The first-stage injection-locked oscillator (ILO) filters out high-frequency clock jitter that loses the correlation due to a latency mismatch between data and the clock. Then, a data-jitter mixer in the second stage of the proposed receiver further increases the jitter correlation reduced by nonoptimal jitter filtering in ILO. Moreover, the DJM reduces power supply noise induced jitter from a clock distribution network, while the conventional jitter filter cannot track the high-frequency jitter because of filtering it out. A prototype receiver implemented in 1-V 65-nm CMOS process achieves 9.6 Gb/s with 1.22-mW/Gb/s in spite of a 1.92-ns latency mismatch between data and a clock.Index Terms-Data-jitter mixer (DJM), double-balanced mixer, injection-locked oscillator (ILO), jitter tracking bandwidth, receiver, source synchronous parallel link.