A Reflection and Crosstalk Canceling Continuous-Time Linear Equalizer for High-Speed DDR SDRAM

This paper presents a reflection and crosstalk canceling continuous-time linear equalizer (CTLE) for high-speed DDR SDRAM interface. To enhance the voltage margin in noisy multi-drop DDR SDRAM channel, the proposed CTLE cancels reflection noise by common-mode compensation and compensates crosstalk by limiting RC filter charging to overcome inversion of common-mode information. The reflection and crosstalk canceling CTLE is implemented in a DRAM process and improves the average voltage margin of 16GB RDIMM at 3.2Gbps with 28.3mV.