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3.48 ps ECL ring oscillator using over-300 GHz fT/fmax InP DHBTs

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4 Author(s)
M. Ida ; NTT Photonics Labs., NTT Corp., Atsugi, Japan ; K. Kurishima ; K. Ishii ; N. Watanabe

An ECL gate delay of 3.48 ps/stage in a 19-stage conventional ring oscillator fabricated in an over-300 GHz fT/fmax InP DHBT technology has been demonstrated. This is the first report (to the authors' knowledge) of sub-4 ps ECL gate delay. Large collector current density contributes to the very short gate delay.

Published in:

Electronics Letters  (Volume:39 ,  Issue: 16 )