Low-Jitter Design for 25-Gb/s CMOS-Based Optical Interconnects

Jitter of a 25-Gb/s optical link is numerically and experimentally analyzed. The numerical analysis shows that a 25-Gb/s optical transceiver needs retiming circuits in its transmitter and receiver in order to satisfy the targeted jitter budget of the optical link. Because the random jitter (RJ) largely contributes the total jitter of the 25-Gb/s optical link, an equation for calculating the RJ cau...