A low-power transmitter driver for chiplet interconnection was designed and experimental-ly implemented based on the inter-chip interconnection standard proposed by the UCIe protocol.The driver circuit adopts a source series terminated(SST)driver,whose power consumption is only 1/4 that of the current mode logic(CML)structure.In addition,based on adjustable feedforward equalization technology,the driver circuit adjusts the equalization strength for different channel attenuations.By de-emphasizing equalization,it enhances the quality of the transmitted signal,ultimately reducing inter-symbol interference.This circuit was designed under CMOS 28 nm process.The front-end simulation results show that the maximum equalization intensity is-3.7 dB when the 0.9 V voltage is supplied.When the 32 Gbps NRZ signal passes through the 21 mm channel(the attenuation at the 16 GHz Nyquist frequency is-2.37 dB),after adjusting the appropriate equalization intensity,the eye height of the output waveform eye diagram is 253 mV(71.8%),the eye width is 27 ps(87%),and the simula-tion power consumption is only 4.0 mW.
Chipletfeedforward equalizer(FFE)source series terminated(SST)driverserDestransmitter
国家科技期刊平台
NSTL
万方数据
