Abstract
A 10-Gb/s fully integrated optical receiver analog frontend was realized in a commercial 0.35-μm 50-GHz fT SiGe BiCMOS technology. An input capacitance immunization technique was used to diminish the large input parasitic capacitance of the transimpedance amplifier to achieve a highgain, wide-bandwidth, low-noise performance. The overall transimpedance gain is 107.3-dBΩ, and the-3 dB bandwidth is 8.8S-GHz with 1.1 pF input parasitic capacitances. The measured results demonstrate a differential output swing of 842 mV p-p with 50-Ω output load, a peak-to-peak jitter (jitter p-p ) of 13.22 ps, and a sensitivity of-16.4 dBm at a bit error ratio (BER) of 10 -12 with a 2 31 -1 PRBS test pattern. The total circuit, including output buffer, dissipates 195 mW under 3-V supply and occupies 0.7 × 0.7 mm 2 chip area. © 2008 IEEE.