A 40-Gb/s transmitter with 4∶1 MUX and subharmonically injection-locked CMU in 90-nm CMOS technology

A low-power low-jitter 40-Gb/s transmitter incorporating triple-resonance technique and subharmonically injection-locked CMU is presented. Designed and fabricated in 90-nm CMOS technology, this chip provides 4∶1 multiplexing and achieves 454 fs,rms output data jitter while consuming only 325 mW from a 1.5-V supply.