硬件锁中的无线USB

• 作 者: Ron Wilson
• 机 构: EDN 执行主编,
• 出 处: 电子设计技术
• 发表日期: 2006年11期
• 关键词: 无线基站 参考设计 端口 桌面 控制器 小小 集成度 供应商 接口 硬件

无线USB的前途似乎无与伦比——它能消除那些把大家桌面弄得像鼠窝一样小小的不怎么灵便的电缆。但事实上,只有需要大量的外设时无线USB设备才有优势,而且它必须非常微型而廉价,否则带来的麻烦远多于缠绕的电缆。因此,插在PC USB端口作为无线基站的硬件锁就必须有尽可能高的集成度。但一片芯片中要包含USB有线接口、控制器、无线基带和RF电路,技术上还无法实现。下面我们将看到一家供应商Wisalr的一种可量产参考设计,它是如何接近于解决这个问题的。

The future of wireless USB seems unmatched-it eliminates the less-than-awkward cables that make everyone’s desktop look like a mouse. But the fact is that wireless USB devices have the advantage only when a large number of peripherals are needed, and they must be very miniature and inexpensive, which can lead to far more trouble than twisted-pair cables. Therefore, a hardware lock that plugs into a PC USB port as a wireless base station must have the highest possible level of integration. However, a chip to include USB cable interface, controller, wireless baseband and RF circuits, the technology can not be achieved. Below we will see how Wisalr, a supplier, can produce a reference design that is close to solving this problem.