A 10 Gb/s adaptive analog decision feedback equalizer for multimode fiber dispersion compensation in 0.13 µm CMOS

A 2 × 50-Gb/s receiver with adaptive channel loss equalization and far-end crosstalk cancellation

“…Finally, the output is restored to its full logic level by a slicer realized as a cascade of three identical shunt-peaked differential pairs each with a gain of 3. The adaptation for the FFE uses the same LMS-based method as that described in [5].…”

10 Gbit/s serial link receiver with speculative decision feedback equaliser using mixed‐signal adaption in 65 nm CMOS technology

“…Among various equalisers, continuous-time linear equaliser (CTLE) based on adjustable source degeneration of a differential pair is a classical configuration [2][3][4]. For more effective compensation, decision feedback equaliser (DFE) has been widely used [3][4][5]. Recently, using the combination of CTLE and DFE in the receiver side becomes the mainstream [3,4].…”

“…This Letter presents a 10 Gbit/s serial link receiver, the equalisation of which is realised by an offset-calibrated CTLE and an adaptive one-tap DFE. A mixed-signal implementation of the DFE adaption is proposed, which is much simpler and shows lower power consumption than the traditional adaption methods [1,3,5]. Measurement results are also exhibited.…”

“…The realisation of the DFE adaption in most papers is using the digital approach with high complexity [1,3]. The reported complete analogue implementation [5] requires several well-designed Gilbert multipliers, which are lack of stability. Therefore, a novel mixed-signal implementation of sign-sign least mean square algorithm for DFE adaption is proposed in this Letter.…”

Multidiameter optical ring and Hermite–Gaussian vortices for wavelength division multiplexing–mode division multiplexing

“…28,29 Another approach for MDM is to fabricate nonconcentric multiring fiber switch with significant difference in effective refractive index of fiber eigenmodes between cores to mitigate intermodal crosstalk between OAM modes. 30 To improve spatial channel densities, multielement fiber (MEF) comprising multiple fiber elements that are drawn and coated together in a common polymer coating has been fabricated. 31 To decouple the channels at the receiver, several methods for estimation of the channel matrix and adaptive equalization have been postulated.…”