A Transmitter to Compensate for Crosstalk-Induced Jitter by Subtracting a Rectangular Crosstalk Waveform From Data Signal During the Data Transition Time in Coupled Microstrip Lines Hae-Kang Jung, Il-Min Yi, Soo-Min Lee, Jae-Y

Abstract

A single-ended transmitter (Tx) is proposed to com- pensate for the crosstalk-induced jitter (CIJ) of coupled microstrip lines by subtracting a mimicked crosstalk waveform from data signal at Tx during the data transition time, depending on the data transition of an adjacent line. Si nce the CIJ component is propor- tional to the time derivative of data signal, the mimicked crosstalk waveform subtracted at Tx cancels the CIJ at receiver (Rx) for the linearly changing data signal with time. As a by-product, this scheme reduces ISI at Rx. The Tx chip in a 0.13- mC M O Sp r o c e s s reduces the total Rx jitter by 96 ps (69%) at 7.2 Gbps (4-in chan- nels) and by 120 ps (72%) at 6 Gbps (8-in channels).