10-Gb/s high-density trans-impedance amplifier in 0.18-μm CMOS

In this work, a pseudo-differential trans-impedance amplifier (TIA) was designed in a 0.18-¿m CMOS technology. To make it utilized in short-distance, high-density multi-channel optical communication system, modified regulated cascade (MRGC) input configuration and active inductances were exploited to broaden the bandwidth without bringing much penalty to the power consumption and the chip area. The circuit occupies a chip area of 75 ¿m × 80 ¿m. Post-layout simulations demonstrated that a single channel TIA can achieve a trans-impedance of 51.87 dBQ, a bandwidth of 8.5 GHz for 0.3 pF photodiode capacitance. The power consumption is 19 mW.