A 10 Gbit/s Optical Receiver Analog Front-End with Input Parasitic Capacitance Immunization Technique

Abstract

This paper presents a 10 Gbit/s SiGe optical receiver analog front-end (AFE) using input parasitic capacitance immunization technique to enhance bandwidth performance. The broadband technique can strongly reduce the total input capacitance of the optical receiver AFE. The 10 Gbit/s optical receiver AFE was realized in a standard 0.35 µm SiGe bipolar junction transistor complementary metal oxide semiconductor (BiCMOS) process. The measured performance results of the receiver AFE demonstrate a differential output swing of 600 mV under 50 Ω instrument loads, a peak-to-peak jitter (jitterp–p) of 28.28 ps, a root-mean-square jitter (jitterrms) of 4.47 ps, and an input sensitivity of -12.1 dBm, respectively, at a bit error ratio (BER) of 10-12 under a 10 Gbit/s 231-1 pseudo random binary sequences (PRBS) test pattern. The total circuit dissipates 180 mW under a 3 V supply, and the chip size is 700 ×760 µm2.