Abstract

A low voltage, high modulation current 10Gbps laser diode driver was realized in a 0.2 μm SiGe BICMOS technology, by using multiple common-mode feedback loops to generate both the output modulation current and the output driver variable biasing currents. Adaptive RC compensation networks provide an optimal switching speed while controlling the overshoot and ringing over a wide range of modulation current. On-chip summation of bias and modulation currents and built-in OpAmps for the bias and modulation current generators assure a compact assembly.

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