A 0.49-9.8 Gb/s 0.1-1V Output Swing Transmitter with 38.4MHz Reference and <30 ns Turn-On Time

We present a rapid on/off transmitter using a two-stage cascaded clock multiplier that generates a 2.46-4.92GHz clock from 38. 4MHz clock, and a voltage-mode output driver with fast-on regulators for 0.1-1.0V output swings, 2-tap FIR equalizer, and fixed output impedance. The rapid on/off clock multiplier and wide range of output swings help optimize the power consumption based on channel loss and data transmission latency while extending average data rates to below 500Mb/s. Fabricated in TSMC 65 nm process, the transmitter achieves 3.4-4.5 PJ/b efficiency at 9. S4Gb/s for 0.1-1V respectively, in alwayson case. The power scales down by 1. 6X for 4. 92Gb/s. During on/off operation, the energy efficiency becomes 1. 7X for a 20X reduction in the average data due to off-state power consumption.