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Proceedings Paper

A high-dynamic range transimpedance amplifier with compression
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Paper Abstract

This paper presents a transimpedance amplifier (TIA) with the logarithmic compression of the input current signal. The presented TIA has two regions of operation: a linear one for small input current signals and a compression one for high input currents, that could otherwise saturate the TIA. The measured -3dB bandwidth in the linear region of operation is 102MHz. The measured maximum input current overdrive is 20.5mA. However, the maximum of the monotonic compression is approx. 8mA. Using the compression technique we could achieve low rms equivalent input noise current (~20.2nA) within the measured bandwidth and with approx. 2pF capacitance at the input. Thus the dynamic range at the input of the TIA is approx. 120dB considering the maximal current overdrive. The proposed TIA represents the input stage of a optical receiver with integrated differential 50&OHgr; output driver. The optical receiver occupies approx. 1.24mm2 in 0.35 &mgr;m SiGe BiCMOS technology and consumes 78mA from 5V supply.

Paper Details

Date Published: 5 March 2007
PDF: 8 pages
Proc. SPIE 6476, Optoelectronic Integrated Circuits IX, 64760F (5 March 2007); doi: 10.1117/12.700019
Show Author Affiliations
D. Mičušík, Vienna Univ. of Technology (Austria)
H. Zimmermann, Vienna Univ. of Technology (Austria)

Published in SPIE Proceedings Vol. 6476:
Optoelectronic Integrated Circuits IX
Louay A. Eldada; El-Hang Lee, Editor(s)

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