A 2.5 Gb/s CMOS Transimpedance Preamplifier for Optical Receiver

A 2.5 Gb/s transimpedance preamplifier was realized by using 0.35 μm CMOS technology. This preamplifier gives a 2 GHz bandwidth with 59 dB·Ω transimpedance gain. The equivalent input current noise is about 0.8×10 -22A 2/Hz at 2 GHz frequency point. Under the supply voltage of 5 V, the power dissipation is 250 mW. The PCML single-ended output signal has the constant output voltage swing (200 mV p-p). The chip area is 1.0 mm×1.1 mm.