ltspice.analog.com
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Analog Devices’ LTspice site offers the free LTspice circuit simulator with built-in schematic capture and a fast SPICE engine for analog and mixed-signal circuits. It provides downloads, user guides, model libraries, tutorials, and example circuits to help learn, test, and verify designs.
More resources on Analog Electronics
The Art of Electronics
The absolute technical authority on analog and digital circuit design, emphasizing practical intuition and circuit-level discipline.
electronics-tutorials.ws
Electronics-Tutorials.ws is a free online resource offering step-by-step tutorials on basic and advanced electronics, with clear explanations, diagrams, and practical circuits. Topics include fundamental concepts (Ohm's Law, circuit theory), electronic components (resistors, capacitors, diodes, transistors), and hands-on sections on amplifiers, filters, and other common circuits.
All About Circuits
Chapter of the open-licensed Lessons in Electric Circuits textbook explaining how analog and digital signals differ and why the distinction matters for measurement. The wider volumes cover DC, AC, semiconductors and instrumentation with worked examples.
Analog Circuits
Learn analog circuit design principles with Prof. Krishnapura's comprehensive course on analog electronics.
The Amp Hour
Chris Gammell and Dave Jones' voices span the chasm of thousands of miles each and every week to speak to each other and industry experts about where the field of electronics is moving. Whether it be a late breaking story about a large semiconductor manufacturer, a new piece of must-have test equipment or just talking through recent issues with their circuit designs, Chris and Dave try to make electronics more accessible for the listeners. Most importantly, they try and make the field of electronics more fun. Guests range from advanced hobbyists working on exciting new projects up through C-level executives...
Practical Electronics for Inventors (4th Edition)
Hands-on electronics reference covering circuit theory, passive components, diodes, transistors, op amps, power supplies, digital logic, sensors, motors and microcontroller interfacing, with worked calculations. Readers learn to choose components and design working circuits rather than copy schematics.