Abstract:A design of low power and wideband transimpedance pre amplifer (TIA) was implemented in TSMC 0.18μm CMOS process for 10Gb/s high speed optical communications. The TIA circuit exploits the regulated cascade (RGC) configuration with low input resistance as the input stage, meanwhile the inductive shunt peaking and capacitive degeneration techniques were introduced to make bandwidth enhancement. Experimental results show that the proposed CMOS TIA circuit which accommodates a photodiode capacitor of 250fF, shows a -3dB bandwidth of 9.2GHz and transimpedance gain of 57.6dBΩ. The noise simulation shows the average input referred noise current spectral density is 16.5pA/Hz and the group delay is ±20ps. The power dissipation of the chip is 26mW under single 1.8V power supply.
