A multibitrate burst-mode CDR circuit with bit-rate discrimination function from 52 to 1244 Mb/s

We fabricate and assess a clock and data recovery (CDR) circuit with a bit-rate discrimination (BRD) function that can receive burst-mode signals containing packets of different bit rates. The clock recovery circuit in the CDR circuit consists of gated oscillators (GOs) for handling the burst-mode signals, whose bit rates vary with each packet. Moreover, we improve the performance of the clock recovery circuit based on GOs against the bit rate unevenness around each bit rate. By combining an agile clock recovery circuit and a digital BRD circuit, the CDR circuit can handle multiplexed bit rates. Tests show that the circuit offers excellent performance for the multiplexed bit rates of nonreturn-to-zero 52, 155, 622, and 1244 Mb/s.

[1]  M. Banu,et al.  Clock recovery circuits with instantaneous locking , 1992 .

[2]  Wonchan Kim,et al.  An auto-ranging 50-210 Mb/s clock recovery circuit with a time-to-digital converter , 1999 .

[3]  N.K. Cheung,et al.  Bit-rate detection circuit for rapidly reconfigurable rate-transparent optical networks , 1999, IEEE Photonics Technology Letters.

[4]  Masashi Hashimoto,et al.  Multi-bit rate passive double star system using time-unit packet , 2001 .

[5]  J.C. Scheytt,et al.  A 0.155, 0.622, and 2.488 Gb/s automatic bit rate selecting clock and data recovery IC for bit rate transparent SDH-systems , 1999, 1999 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC. First Edition (Cat. No.99CH36278).

[6]  Shoukei Kobayashi,et al.  A burst-mode packet receiver with bit-rate-discriminating circuit for multi-bit-rate transmission system , 1999, 1999 IEEE LEOS Annual Meeting Conference Proceedings. LEOS'99. 12th Annual Meeting. IEEE Lasers and Electro-Optics Society 1999 Annual Meeting (Cat. No.99CH37009).

[7]  T. J. Gabara,et al.  150/30 Mb/s CMOS non-oversampled clock and data recovery circuits with instantaneous locking and jitter rejection , 1995, Proceedings ISSCC '95 - International Solid-State Circuits Conference.