This paper reports a bang-bang clock and data recovery circuit (BBCDR) with an ultra-wide capture range. The circuit exhibits automatic frequency capture and phase locking over a wide 6-to-38 Gb/s range without using a frequency detector, allowed by a recently proposed deliberate-current-mismatch technique. Moreover, we accurately obtain an eight-phase clock through analog interpolation of quadrature signals over the whole wide frequency range by introducing a tunable capacitor array before an inverter-based phase interpolator. A 65-nm prototype of the developed BBCDR occupies an area of 0.07 mm2 and attains a bit error rate of less than 10−12 under a continuously variable input frequency, with a total power consumption of 24.6 mW for a 32-Gb/s non-return-zero input, thus leading to 0.769-pJ/bit energy efficiency.

A 6-to-38Gb/s capture-range bang-bang clock and data recovery circuit with deliberate-current-mismatch frequency detection and interpolation-based multiphase clock generation / Lin, Wang; Yong, Chen; Chaowei, Yang; Xionghui, Zhou; Mei, Han; Crovetti, PAOLO STEFANO; Pui-In, Mak; Rui P., Martins. - In: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS. - ISSN 1097-007X. - ELETTRONICO. - 51:5(2023), pp. 1988-2015. [10.1002/cta.3535]

A 6-to-38Gb/s capture-range bang-bang clock and data recovery circuit with deliberate-current-mismatch frequency detection and interpolation-based multiphase clock generation

Crovetti Paolo Stefano;
2023

Abstract

This paper reports a bang-bang clock and data recovery circuit (BBCDR) with an ultra-wide capture range. The circuit exhibits automatic frequency capture and phase locking over a wide 6-to-38 Gb/s range without using a frequency detector, allowed by a recently proposed deliberate-current-mismatch technique. Moreover, we accurately obtain an eight-phase clock through analog interpolation of quadrature signals over the whole wide frequency range by introducing a tunable capacitor array before an inverter-based phase interpolator. A 65-nm prototype of the developed BBCDR occupies an area of 0.07 mm2 and attains a bit error rate of less than 10−12 under a continuously variable input frequency, with a total power consumption of 24.6 mW for a 32-Gb/s non-return-zero input, thus leading to 0.769-pJ/bit energy efficiency.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2978392