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

Abstract

A single-ended transmitter (Tx) is proposed to compensate 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. Since the CIJ component is proportional 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-m CMOS process reduces the total Rx jitter by 96 ps (69%) at 7.2 Gbps (4-in channels) and by 120 ps (72%) at 6 Gbps (8-in channels).

A Systematic Equalizer Design Technique Using Backward Directional Design

“…The required input waveforms are shown in Figure 9. The XTC waveforms can be implemented with one of the methods in [8][9][10]. [10] was selected this paper.…”

“…XTC waveforms can be implemented with one of the methods in [8][9][10]. [10] was selected this paper.…”

“…In these systems, signal loss and coupling effects can deteriorate a channel's performance. The high-frequency energy loss and coupling in channels can be reduced by employing pre-emphasis [2][3][4][5][6], decision feedback equalizer [6,7], and crosstalk cancellation (XTC) [8][9][10], but there remains a problem of designing these circuits. Since there are many different kinds of interconnection in chip systems, a variety of equalizers must be designed to fit their application.…”

Pair-wise staggering transmitter for single-ended parallel signaling

“…These types of noise can degrade the channel eye characteristic and may eventually increase channel bit error rate (BER). Various crosstalk cancellation methods have been proposed to solve this problem [2,3,4,5,6,7,8,9], in which the crosstalk noise cannot be precisely removed even with increased power and area overheads. A data staggering method, which can efficiently suppress the generation of the crosstalk noise using relatively simple hardware, has been proposed [10].…”

A 6.5-Gb/s 1-mW/Gb/s/CH Simple Capacitive Crosstalk Compensator in a 130-nm Process

“…These problems motivated the introduction of crosstalk compensation techniques that do not require a mode detection block [3]- [5], [7]. Some of these circuits [3], [4] still require significant power to control the slew rate of the output drivers at the transmitter, together with a clock distribution block, which is difficult to design. If compensation is performed at the receiver [5], [6], it is difficult to match the timing of the transferred data and the generated compensation signal.…”