Folded-cascode transimpedance amplifier for burst-mode applications

A transimpedance amplifier (TIA) designed in a digital 0.18 /spl mu/m CMOS technology is presented. The photodetection of the 1.3 /spl mu/m light is done by a ternary PIN photodiode. The TIA is performed as a folded cascode stage with a transimpedance of 1.6 k/spl Omega/ in the most sensitive case. A sensitivity of -28 dBm for 622 Mb/s at a bit error rate (BER) of 10/sup -11/ and -22 dBm for 1.25 Gb/s at a BER of 10/sup -10/ is achieved.