Derek Tam

8.6 A full-duplex line driver for Gigabit Ethernet with rail-to-rail class-AB output stage in 28nm CMOS

This paper details a duplex architecture coupled with a linear Class-AB push-pull output stage that maximizes the power efficiency of linear wideband drivers for high-speed transceivers. The duplex driver merges transmission, reception, and termination; eliminates hybrid and termination overhead; and enables adaptive echo cancellation and rail-to-rail full-duplex operation. Implemented in 28 nm CMOS, this GPHY driver passes the 1000BASE-T and 100BASE-TX compliance tests using a 2.5 V supply and meets the transmit specifications for the half-duplex 10BASE-T Ethernet using a 3.3 V supply.

A 65nm CMOS self-terminated open-drain IDAC line driver suitable for fast Ethernet applications

A self-terminated line driver suitable for fast Ethernet operates in class AB mode and combines digital signal processing with low-power analog circuits. It dissipates 108mW, 48% less than an existing state-of-the-art design. It occupies 0.22mm2 in a 65nm standard CMOS technology and operates from a 2.5V supply.

10.3 An analog front-end for 100BASE-T1 automotive Ethernet in 28nm CMOS

Ethernet over a single unshielded twisted pair (UTP) copper cable coupled with power over data lines (PoDL) is gaining momentum for automotive networking, as evidenced by the recent adoption of BroadR-Reach as the IEEE802.3bw (100BASE-T1) standard and the drafting of the IEEE802.3bp (1000BASE-T1) and IEEE802.3bu (PoDL) standards [1]. BroadR-Reach has won out for its superb electromagnetic compatibility (EMC) performance - a major challenge for adapting Ethernet to automotive environments [2]. Ethernet over plastic optical fiber, as specified by IEEE802.3bv [1], appears to be an EMC solution, but a separate medium is required to deliver power to networked sensors (such as cameras). Shielded pairs are not a good choice either, due to weight/size constraints and reliability concerns about shield grounding. This paper describes an analog front-end (AFE) that tackles the EMC problems and enables a 100BASE-T1 automotive product in 28nm CMOS.