Broadband transimpedance amplifier in 0.35-#x03BC;m SiGe BiCMOS technology for 10-Gb/s optical receiver analog front-end application

摘要

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 high-gain, wide-bandwidth, low-noise performance. The overall transimpedance gain is 107.3-dBΩ, and the −3 dB bandwidth is 8.85-GHz with 1.1 pF input parasitic capacitances. The measured results demonstrate a differential output swing of 842 mVp-p with 50-Ω output load, a peak-to-peak jitter (jitterp-p) of 13.22 ps, and a sensitivity of −16.4 dBm at a bit error ratio (BER) of 10−12 with a 231−1 PRBS test pattern. The total circuit, including output buffer, dissipates 195 mW under 3-V supply and occupies 0.7 x 0.7 mm2 chip area.