Signal Line Common Mode Choke

In network communication equipment design, the connection method between the PHY chip and the LAN transformer directly affects signal integrity, anti-interference capability, and overall system stability. As a FAE (Field Application Engineer) at Suzhou Vo

In Ethernet hardware circuit design, the LAN Transformer is a core component that ensures signal transmission and provides electrical isolation. The isolation transformer and common‑mode choke (CMC), as the two key supporting components of the Ethernet tr

1、FUNCTION INTRODUCTIONE Definition:A planar transformer is a high-frequency transformer manufactured with a special structure and process, and works on the principle of electromagnetic induction. Compared with traditional wound transformers, the core and

In today's digital age, Ethernet, as the dominant wired local area network (LAN) technology, has become the cornerstone of global information exchange. From smart homes and enterprise interconnection to industrial automation and hyperscale data centers, Ethernet infrastructure drives the efficient and stable operation of critical businesses. VOOHU is committed to providing end-to-end Ethernet hardware design solutions, encompassing system-level component supply, customized development support, and in-depth technical empowerment. These solutions are supplemented by evaluation demos and a compr

From the physical layer, this article unpacks the root causes of Ethernet-port compliance, EMI and PoE failures — detailing OCL, return loss, CMRR and PoE center-tap bias in discrete LAN transformers, plus VOOHU full-rate (10/100–18G BASE-T) selection guidance and a selection table.

In PoE power system design, the selection of PSE and PD controllers often draws the most attention. However, in real engineering, whether the matching between the power transformer and the LAN Transformer is appropriate directly determines power supply ef