Active crosstalk cancellation for next-generation single-ended memory interfaces

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

“…Since it is located between inner buffers, the CXC only needs small capacitors. On the other hand, previous designs [6], [7] require large capacitors to obtain the necessary coupling because they are directly connected to a channel with a large capacitance. Large capacitors take up a lot of area and require an equalizer to recover from the loss of signal strength.…”

“…C X can be controlled by capacitor switching [6], [7], although this has its drawbacks. There are eight significant capacitors in a CXC.…”

“…By controlling the voltage at node V, we can control the size of the coupling pulse at node W and, then, control the compensation delay. The current sources of the prototype are manually controlled as in other references [1]- [5], [7].…”

“…However, mode detection circuits require a lot of area and power, and it is difficult to align the timing of the transferred data with the generated mode signal. 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.…”

“…Many crosstalk compensation techniques have been introduced [1]- [7]. Initially, mode detection was used to compensate Manuscript for crosstalk noise [1], [2].…”