Revolution by real-time

Ellinger, Frank; Richter, A.; Fettweis, Gerhard; Watzek, S.; Lindenkreuz, T.; Reicherdt, H.-G.; Richter, Kai-Florian; Festag, Andreas; Schulz, T.; Vossberg, B.; Huysmann, A.; Hartmann, Markus; Naumann, M.; Muthmann, A.

doi:10.1109/imoc.2015.7369034

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…While digital filters have latency in the order of tens of clock periods, an analogue equaliser can have a group delay that is just a small fraction of the clock period. This reduced latency (and especially latency jitter) is very well suited for real‐time applications as accurate time synchronisation [6, 7].…”

Section: Introductionmentioning

confidence: 99%

Low power analogue equaliser with adaptive digital tuning for fast ethernet

Buhr

Kreissig

et al. 2020

IET Circuits, Devices & Systems

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This work presents an analogue equaliser with digital tuning. It compensates the losses introduced by up to 120 m long category 5 unshielded twisted pair cables and baseline wander (BLW). The equaliser is designed for Fast Ethernet with a symbol rate of 125 MHz. A g m-C filter, based on three first-order high pass filters, is used to compensate the cable loss. To minimise power consumption, three operational transconductance amplifiers (OTAs) are merged into a novel multi-input OTA structure. Additionally, a robust digital control logic is presented to automatically adjust the parameters of the equaliser for different cable lengths. A fast settling time below 250 µs is demonstrated for different scenarios. The equaliser is fabricated as part of a Fast Ethernet PHY chip in a 180 nm CMOS technology of GLOBALFOUNDRIES. Measurement results demonstrate error-free data transmission (bit error rate below 10 −12) for cable lengths up to 120 m. The power consumption of the analogue equaliser ranges from 2.3 mW (short cable) to 6.5 mW (120 m cable). To the best of the authors' knowledge, this is the lowest power consumption of an analogue equaliser for Fast Ethernet, supporting additional BLW and flat loss compensation reported to date.

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Section: Introductionmentioning

confidence: 99%