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Gain enhancement and input parasitic compensation in MMIC transimpedance amplifiers for optical receivers

✍ Scribed by Giancarlo Orengo; Ernesto Limiti; Gianluca Acciari; Franco Giannini

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 271 KB
Volume: 17
Category: Article
ISSN: 0895-2477
DOI: 10.1002/(sici)1098-2760(19980420)17:6<377::aid-mop11>3.0.co;2-y

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✦ Synopsis

A technology-independent design solution, based on induc-ti¨e peaking and feedback techniques, is described and applied to the design of GaAs integrated amplifiers for optical recei¨ers. Transimpedance and gain peaking amplifiers are cascaded to increase the gain and to reduce the effect of the photodetector diode parasitic capacitance on the transimpedance bandwidth. A monolithic test ¨ehicle of the methodology has been realized: measured performances include a transimpedance gain of 65 dBQ and a bandwidth of 3.4 GHz from quasi-dc for the unloaded amplifier. The estimated bandwidth, using a low-cost 1 pF input photodiode, is 1.9 GHz, fulfilling the system needs for 2.5 Gbitr s optical links.

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