A 3.75Gbps Configurable Continuous Time Linear Equalizer and 3-tap Decision Feedback Equalizer in 65nm CMOS

Abstract. This paper describes the design of the architecture and circuit block of the RX receiver’s equalizer, which is used to reduce the inter-symbol-interference(ISI) in high-speed transmission backplane, and a 3,75Gbps configurable Continuous Time Linear Equalizer (CTLE) and 3-tap configurable Decision Feedback Equalizer (DFE) are designed and implemented in 65nm CMOS Technology. Those equalizer can be configured according to different channel conditions and the equalizer provides continuous operation range between 0.5Gbps-3.75Gbps, which are designed to work together to mitigate some or most of hte insertion loss and help the receiver to scale and optimize across different needs and applization. The simulation result shows that the horizontal eye opening of recovered data is 0.75UI at 3.75Gbps and the high frequency boost is up to 11dB.

[1]  Yue Lu,et al.  A 66Gb/s 46mW 3-tap decision-feedback equalizer in 65nm CMOS , 2013, 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers.

[2]  Fu Xing-hua.  The Structure Design of MOS Current Mode Logic Adder , 2013 .

[3]  Jin Liu,et al.  Equalization in high-speed communication systems , 2004 .

[4]  Qingsheng Hu,et al.  A 6.25Gb/s Decision Feedback Equalizer in 0.18¥im CMOS Technology for High-Speed SerDes , 2011, 2011 7th International Conference on Wireless Communications, Networking and Mobile Computing.

[5]  Samuel Palermo,et al.  2.5 A 0.25pJ/b 0.7V 16Gb/s 3-tap decision-feedback equalizer in 65nm CMOS , 2014, 2014 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC).

[6]  A.V. Rylyakov,et al.  Power-Efficient Decision-Feedback Equalizers for Multi-Gb/s CMOS Serial Links , 2007, 2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium.

[7]  Meisam Honarvar Nazari,et al.  A 15Gb/s 0.5mW/Gb/s 2-tap DFE receiver with far-end crosstalk cancellation , 2011, 2011 IEEE International Solid-State Circuits Conference.