10 Gb/s 4-PAM Ring Modulator Driver

High speed and low power transmission on optical interconnections can be achieved using ring-based optical modulators. 3D-integration of the ring modulator on top of the driver chip allows compact and cheap transmitters. 4-PAM modulation is considered for the first time for a high data rate.This paper presents a 10 Gb/s ring modulator driver with high and adjustable swing. The circuit is designed in austria microsystems 0.35 μm SiGe BiCMOS technology with a power consumption of 5.87 pJ/bit for 3 V output swing.

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