Printed Wiring Board Definitions

A new page was added to cover Definitions related to PWBs. Most if not all of the terms were already listed within the Engineering Dictionary, but are now combined on one page.

I think the only incoming link is from the Electronic 'P' terms page, but I'll add more soon.
Oh, so this is the first up-load so some off the additions may look different because they come from different pages and of course some common terms may be missing. This page has been in the To-Do box for a few months, so no matter what it has to be a good start.

Up-date; I've added links to the PCB dictionary from the main PWB Information page, PCB External Trace Current Carrying Capacity, and PCB Internal Trace Current Carrying Capacity. A link also resides on the Definition of Minimum Annular Ring page.

Resistor Attenuators

I added a new page to cover schematics of different styles of Resistor Attenuator Networks. The page should support the section of Resistor Terms and Resistor Attenuator Manufacturers.

Normally these devices will be surface mount components so the common term will be Chip Attenuator. The new page shows schematics for the Pi attenuator, T attenuator, and L attenuator.

HCSL Components

A new page was added last week to cover HCSL Clock Oscillator Manufacturers. HCSL switching logic is used with PCIe to name just one interface.

The new page is linked off the main Oscillator Manufacturers vendor page. There is also a link of the Engineering Acronyms pages.


Photo credit; army.mil, Rifleman Radio

VPX Computer Board Format

Added two new pages a few weeks ago relating to VPX boards which is the new style of VME card.
I didn't list them because I was not able to verify the data, but I'll list them now regardless.

I just checked and the new pages have not been found by Google yet, but Google will find the VPX pages today with this posting.

VPX Signal Assignments;
Pinout for the VPX J0 Connector.
Pinout for the VPX J1 / J2 Connector.

Both VPX pin out pages are linked off the VPX Board Description page.

Additional pages related to the VME standard;
VITA 48, REDI Standard.
VPX Board Manufacturers.
VXS Board Manufacturers.
VME Backplane manufacturers.
VME Chassis Manufacturers.
VME Bus Definition.

There are additional pages related to the VME format, not listed here.

Terms used with Resistors

A dictionary of Resistor Terms was started back in 4/08 and consisted of 10 pages [Blog entree; Resistor Definitions] A few months later the 'B/C' page was broken into two separate pages 2/09 [Blog entree; Dictionary of Resistor Terms]. Some time later the 'O' page was added.

Yesterday, yet another page was added by separating the 'F-M' into 'F-L' and 'M' pages. Here are the current pages, listed by the first definition on each page:
Active Resistor. 'A' Terms
Ballast Resistor. 'B' Terms
Carbon Film Resistor. 'C' Terms
Damping Resistor. 'D-E' Terms
Ferrule-terminal Resistor. 'F-L' Terms
Maximum Voltage Rating. 'M' Terms ......... This is the new page that was added
Network. 'N' Terms
Ohm. 'O' Terms
Phenolic Molded Resistor. 'P' Terms
Rated Continuous Working Voltage. 'R' Terms
Semiconductor Resistor. 'S' Terms
Tab Mounted Resistor. 'T' Terms
Variable Resistor. 'V-Z' Terms

There are also a number of side pages detailing Resistor design;
Resistor Tolerance definition.
Resistor Values - Package Sizes.
How to Derate a Resistor.

There are a number of others, but this off-site pages lists many of them: Resistor Products.
Hits to the resistor dictionary really didn't start to pick up until January of this year.