We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is a Logic Analyzer?

By Geisha A. Legazpi
Updated May 21, 2024
Our promise to you
All The Science is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At All The Science, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A logic analyzer is a test and piece of monitoring equipment that receives, or captures, several digital circuit signals then displays, with storage capability, the test digital inputs. For instance, in the two-input AND gate, a simple digital device, all the three sensing points, which include two gate inputs and one output, can be captured by a computer that has sampling and storage capability. When software-intensive digital circuits were not so common, the logic analyzer was able to help technical personnel master the complicated states of purely hardware-wired logic circuits. At some point, building a more complicated digital device based on hard-wired logic was no longer a viable option. Even the best logic analyzers will not equal a software-based digital solution, which can generate the debug dumps that are the equivalent of logic analyzer displays and functionality.

The logic analyzer may have several dozens of input ports that are terminated in various ways. A common termination is a micro-clip that can tap into a leg of an integrated circuit being tested. If a combination of inputs and sequences is supposed to produce a given result, the specific input combinations may be programmed as a trigger that will allow the technical analyst to be notified when a certain combination has occurred. For instance, in a 10-input AND gate, the presence of all “1” in the inputs will have to produce a “1” in the output. The logic analyzer can verify that this condition actually happens and may even be able to provide a scrollable list of states prior to the trigger event.

Some logic analyzers can provide digital as well as analog displays, and this is very useful for testing and troubleshooting digital devices that also have correlated analog signals. For instance, in measuring the performance of certain circuits, the level of an analog test point could serve as the needed trigger event to begin a certain process. Analog and digital analyzer probes are available for interface to a laptop. In the radio frequency testing applications, analog spectrum analyzers use a sampling device that gathers the analog signals for display in real time, while the signal processing, storage, and display function are handled by a computer application. A design change in the analyzer could be a simplified software upgrade as compared to purchasing new hardware modules.

Portable logic analyzers take advantage of the computing power of laptops to simplify most of the functions inside a logic analyzer. For instance, a 24-input digital sampling device may have a universal serial bus (USB) adapter. The USB interface then sends the samples to a computer application for storage, display, and even customized analysis.

All The Science is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.

All The Science, in your inbox

Our latest articles, guides, and more, delivered daily.