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

A capacitive crosstalk compensator (CXC) at a transmitter is presented. It employs double-path capacitive coupling to cancel accurately crosstalk-induced jitter. A mode detector and an additional clock for compensation are eliminated, and only buffers and capacitors are used. The simple architecture consumes low power (1 mW/Gb/s/CH) and occupies small area (0.009 mm²/CH). The chip was fabricated in a 130-nm CMOS process. CXC has the maximum jitter reduction of 34.1 ps (90.5%) and the maximum voltage improvement of 26.6 mV. CXC operates at up to 6.5 Gb/s.