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Optical Receiver Using Noise Cancelling With an Integrated Photodiode in 40 nm CMOS Technology

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2 Author(s)
Atef, M. ; Inst. of Electrodynamics, Microwave & Circuit Eng., Vienna Univ. of Technol., Vienna, Austria ; Zimmermann, H.

A transimpedance amplifier (TIA) based on an inverting voltage amplifier with a shunt feedback resistor using a noise cancelling technique is presented. The TIA is followed by two stages of differential limiting amplifiers and the last stage is a 50 Ω differential output driver to provide an interface to the measurement setup. The TIA shows a measured optical sensitivity of -20.7 dBm for a BER of 10-9 using an external photodiode (PD). Another chip with the same TIA and an integrated N+/Psub PD is also introduced. The optical receiver achieves a measured transimpedance gain of 78 dBΩ, 1.5 GHz bandwidth and a measured input referred noise current density of 7.2 pA/√Hz up to 1.5 GHz. The power consumption of the TIA is only 4.1 mW and the complete chip dissipates 12 mW for a single 1 V supply voltage.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:60 ,  Issue: 7 )

Date of Publication:

July 2013

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