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K. Schneider, H. Zimmermann:
"Low-noise transimpedance amplifier for optical receiver in 120nm CMOS technology";
Talk: International Symposium on Signals, Systems, and Electronics (ISSSE), Linz,Österreich; 08-10-2004 - 08-13-2004; in: "2004 International Symposium on Signals, Systems, and Electronics (ISSSE'04)", (2004), ISBN: 3-9501491-4-7; 70 - 73.

A three-stage transimpedance amplifier (TIA) as preamplifier for optical receivers in passive optical networks (PON) designed in a digital 120nm CMOS technology with a supply voltage of 1.5V is presented. An external ternary pin photodiode with a responsivity of 0.85A/W and a capacitance of 1.2pF is used to detect the 1.3μm light being used for upstream in PON. The open-loop gain of the transimpedance amplifier can be varied by a factor of 115 to enable various transimpedances for a wide input-current range without stability problems. Sensitivities of -31.3dBm at 622Mb/s and -28.6dBm at 1.25Gb/s with a bit error ratio (BER) of 10^-10 and a pseudo random bit stream (PRBS) of 2³¹-1 are achieved. A wide dynamic optical input power range of more than 27dB can be processed.

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