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B. Mesgari, H. Mahmoudi, H. Zimmermann:
"A Single-to-Differential Transimpedance Amplifier for Low-Noise and High-Speed Optical Receivers";
Vortrag: Austrochip 2019, Vienna; 24.10.2019; in: "2019 Austrochip Workshop on Microelectronics", (2019), ISBN: 978-1-7281-1953-3; S. 76 - 80.

This paper presents a transimpedance amplifier (TIA) topology to realize single-ended to differential conversion with no need for a dummy amplifier. The proposed structure includes a Common-Gate Common-Source (CG-CS) topology incorporating an input impedance modification path which allows a large photodiode capacitance. Accordingly, the TIA is designed in 0.35-μm CMOS technology and post-layout simulations show that the circuit can be used in wideband optical communication systems. Consuming 10mW from a 3.3 V supply, the circuit has 2.25 GHz bandwidth and 56.1 dB gain rendering possible a 400 fF capacitance at the input node of the TIA. The input-referred noise of the circuit is lower than 15.5 pA/􀀁Hz and the integrated input noise current is less than 0.6 μA. The TIA demonstrates a gain and phase imbalance of less than 1.5 dB and 5 degrees respectively in the entire bandwidth of interest.

transimpedance amplifier (TIA), single-ended to differential conversion, input impedance , optical receiver.

http://dx.doi.org/10.1109/Austrochip.2019.00025