Abstract
This paper proposes a simple method to enhance the timing margin of high-speed digital signals for multiconductor transmission lines (MTLs) in inhomogeneous media. It uses interline capacitances to implement the capacitance matrix homogenizing the original inhomogeneous structure. As a result, it equalizes the velocities of all the modes involved in the MTL structure simultaneously. The design equations are derived and the limitation of the proposed scheme is explained. For the experiment, a 100-mm three-line coupled microstrip MTL (M-MTL) is built. The measured total peak-to-peak jitter including crosstalk and other noises was 91 ps in the test structure. When the M-MTL is loaded by the proposed values of lumped capacitors between the adjacent lines, the jitter is reduced to 12 ps, whereas the measurement using the even/odd mode approach shows 22 ps jitter. All the measurement results are in good agreement with the theoretical values, which proves the effectiveness of the proposed method.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have