-The shorter time-to-market cycles have lead to the development of this document which ensures system level electrical functionality and electromagnetic compatibility at first (in most cases) / second prototype stages only of a product, rather than expensive several revisions.
This document is a most comprehensive document you will ever find out there in the EMI/EMC area of specialization. It is full of experimental results gathered over several years in the PC, telecommunication, networking and electrical industries. This document also provides references to more than 12 books for further study of materials discussed in this document, one of which also describes about filter softwares available on the market.
"Another term I introduced was, an embedded capacitance. There is PCB space available on all layers under cable header on the PCB at I/O connection. This capacitor is intended for common mode noise signals filtering at I/O, it may also provide protection against ESD (electrostatic discharge). The embedded capacitor will have one plate common to CGND and other individual plates connect to each trace as shown below in fig. 4a. This arrangement can save you many discrete capacitors!"
" The Trace Inductance and Via
Reference book #10 has covered this topic in much more details. I shall present this topic with few examples, which has proven the necessity of understanding these issues at early on stages of a product, such as first prototype. There are several scenarios one must take into account when designing very high frequency circuits. By high frequency I mean fundamental clock frequency (>1MHz), or rise or fall times of the order of few nano seconds or less. However, it is also possible clock signals with clock frequencies much less than 1 MHz, and rise and fall times in the nano seconds range could have Fourier spectrum extending all the way in the hundreds of Megahertz range.
(a) Depending upon frequency or rise/fall times or in other words the desired Band width for the signal to be transmitted from source to receiver, designer has to use micro-strip transmission lines or strip-line transmission lines. Strip lines are useful for relatively low frequency design as compared to microstrip transmission lines. However, one great advantage of using strip line technique, provides shielding from one layer to the other as well.
In case of a 50 ohm micro-strip transmission line, a capacitance of 5pf/inch, the value of inductance
will be Z= (L/C)
(b) Trace without an image plane
or image plane is at an infinite distance (usually enclosure for
common mode noise signal) from it.
Inductance of a Wire:
Where, L= inductance in nH, Len= length in inches ....."
And much more..............., you will be glad to have this document!