Test Coupon，是用来以 TDR (Time Domain Reflectometer 时域反射计) 来测量所生产的 PCB 的特性阻抗是否满足设计的要求，一般要控制的阻抗有单端线和差分对两种情况，所以 test coupon 上的走线线宽和线距(有差分对时)要与所要控制的线一样，最重要的是测量时接地点的位置。

What is a high-speed Printed Circuit Board (PCB)? What effects bandwidth in my PCB design? These are a few of the FAQs we get asked by designers about creating high-speed PCB designs. Since PCB layout ...

SAN DIEGO--(BUSINESS WIRE)--Altium LLC (ASX: ALU) announced today that it has launched Altium Education, a free online curriculum and certification program for college and university students ...

This unit was designed for the Expo Reliant drill. The controller can power other small PCB drills, as well as other devices containing small 12 Volt DC motors, although some changes to component ...