A 6.5Mb/s to 11.3Gb/s continuous-rate clock and data recovery

Kenney, J.G.; Chen, Terry; DeVito, L.; Dalton, D.; McCracken, Stuart; Soenneker, Richard; Titus, W.; Weigandt, Todd

doi:10.1109/cicc.2014.6946023

Cited by 5 publications

(1 citation statement)

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“…To cover the input data format from a few gigabits per second to tens of gigabits per second, the “analog” receiver necessitates a clock and data recovery (CDR) circuit with a very wide frequency capture capability 4 . Previous work 5 employs a low‐noise crystal as a reference clock, which increases the overall cost and the design complexity. Reference‐less CDR mainly targets applications that are not feasible to use an external crystal 6 .…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Chen

Yang

et al. 2023

Circuit Theory & Apps

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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 mm 2 and attains a bit error rate of less than 10 À12 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.bang-bang clock and data recovery (BBCDR), current mismatch, frequency detector (FD), hybrid control circuit (HCC), phase interpolator (PI), ring oscillator (RO), R-2R digital-toanalog converter (DAC), switched-capacitor (SC) array, wide capture range

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Section: Introductionmentioning

confidence: 99%