A 2nd order CTLE in 130nm SiGe BiCMOS for a 50GBaud PAM4 Optical Driver
In this paper, we presented a low frequency equalizing continuous time linear equalizer (LFEQ CTLE) It can compensate not only the low frequency channel loss but also the high frequency channel loss. The LFEQ CTLE adopts the degeneration R C and negative feedback loop to generate the high frequency zero/pole and low frequency zero/pole. Based on Global Foundry $130nm$ SiGe BiCMOS process to achieve the overall design, the proposed CTLE compensates for the 17dB channel loss at Nyquist frequency for 50GBaud PAM4 data rates.
2018 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)