# Welcome to The Engineering Mind Blog!

Musings from the minds of our many talented engineers and #TeamEZ members about subjects they are passionate about.

• ## Basics in RF Communications: Modulation Techniques Part 1 of 7

Radio frequency (RF) modulation is a technique for passing data between distant places using an electromagnetic wave as a carrier. Cables can also be used, but RF is mostly wireless. Modulation and demodulation are how we imprint and extract data fro...
• ## Designing a Kelvin-Varley Potentiometer Part 3 of 3 – Kelvin Varley Dividers

Over the last two blog posts, we’ve built the foundations of a Kelvin-Varley potentiometer. Recall that a potentiometer is a measuring instrument that uses a resistor with three terminals and a wiper to form an adjustable voltage divider. This ...
• ## Designing a Kelvin-Varley Potentiometer Part 2 of 3 – Kelvin Potentiometer

We have seen in the previous blog how basic resistors, with their variable, adjustable, or tunable forms, can be used to build a voltage divider. Adjustable voltage divider or potentiometers (pots) are used in various functions such as dimmable light...
• ## Designing a Kelvin-Varley Potentiometer Part 1 of 3 – Resistors in Voltage Divider

There is a lot of potential in a potentiometer! This measuring instrument, also called a pot or electronic pot, uses a resistor with three terminals to form an adjustable voltage divider. It can be used in light switch dimmers, audio volume controls,...
• ## Voltage References from Diode to Band Gap: Episode 3 – Band Gap References

So far in this blog series, we’ve learned when and why to use voltage references and a few techniques for generating these references, including the trade-offs of each technique. Here, we will learn how to use the band gap technique to generate...
• ## References Voltage from PN junction till Band Gap - Zener Diodes

In the previous blog, we refreshed ourselves about References in general and then we initialize the journey by showing voltages built from forward biased PN junctions that include standard diodes, LEDs and BJTs. We go further here with more sophistic...
• ## Introduction to References and PN Junctions as First Fix Voltages

References in General and PN Junctions as First Fix Voltages This first blog post covers some highlights about references in various domains and we jump on the very first simple devices that provide fixed voltages, it will be a 3 part blog. What, Why...
• ## Mastering Precision: A Guide to Setup Your Laboratory for IPn Measurement

Introduction  In the previous blog, you learned how IPn is obtained graphically based on the polynomial representing a general non-linear device. More specifically IP3 and IP2 are the most looked at parameters for many RF components. In this las...
• ## Decoding Intercept Points: Unveiling the Power of IPn Graphic Tools

Introduction  In the previous blog post, we learned how the various intermodulation products are generated by non-linearities with multi-tone signals.  In this blog post, we will show the method to evaluate the IPn; especially the one ...