A simultaneously bidirectional inductively coupled link in a 0.13-mu m CMOS technology

Abstract

A simultaneously bidirectional inductively coupled link has been developed to provide higher signaling bandwidth for a given inductively coupled channel. Two types of echo signals, that is, the resistive and inductive echo signals, are canceled without an inductive replica load to save silicon area. The resistive echo signal is canceled with a replica driver driving a resistive replica load, while the inductive echo signal is canceled by deliberately controlling the timing of a receiver comparator. The prototype implemented in a 0.13-mu m complementary metal-oxide-semiconductor (CMOS) technology occupies 0.019mm(2) including an on-chip channel inductor and shows 9.1-pJ/b energy efficiency at 3.0-Gbps signaling bandwidth, that is, 1.5Gbps in each signaling direction. Copyright (c) 2016 John Wiley & Sons, Ltd.