Latest Articles | uSimmics (QucsStudio) Tutorial Roadmap: Beginner to Advanced

What Is Qucs-S? Differences from LTspice and uSimmics Explained [2026 Edition]

Qucs-S is an open-source circuit simulator that connects the Qucs interface to SPICE engines. This article explains what Qucs-S is, how it differs from LTspice and uSimmics, and when it is useful.

What Is uSimmics? Why QucsStudio Changed Its Name and What Has Changed [2026 Edition]

uSimmics, formerly QucsStudio, is a free and powerful circuit simulator. This article explains why QucsStudio changed its name, what has changed, compatibility with old files, and its position among the Qucs family.

LTspice vs. uSimmics (formerly QucsStudio): Which Should You Use? [2026]

LTspiceとuSimmics（旧QucsStudio）の違いを機能・エンジン・用途で徹底比較。高周波RF設計ならuSimmics、アナログ電源設計ならLTspiceという使い分けの根拠を2026年版で解説します。

What Is Crosstalk? Understanding Parasitic Coupling in PCB Traces

Crosstalk is an unavoidable effect in high-speed PCB design. This article explains crosstalk at the circuit level, focusing on parasitic capacitive and inductive coupling that do not appear in schematics.

Noise Design & EMC

Why Ferrite Beads Work: Damping Ringing with Loss (uSimmics Waveforms)

Learn why ferrite beads reduce ringing: it’s loss, not “inductance.” Compare ideal L, ideal R, and a real bead (.s2p) in uSimmics.

Noise Design & EMC

What Is Ringing? Understanding Jagged Oscillations with uSimmics

Learn what ringing is in high-speed digital circuits.This article explains LC resonance and damping using a minimal circuit and transient analysis in uSimmics, with clear waveform examples.

Noise Design & EMC

Understanding Signal Reflection in High-Speed Digital Circuits

Learn what signal reflection is in high-speed digital circuits.This beginner-friendly guide explains impedance mismatch, transmission lines, and waveform steps using a simple uSimmics simulation.

Noise Design & EMC

Noise Mitigation Basics with uSimmics: Source → Path → Victim

Learn a simple noise/EMC framework: Source → Path → Victim. See how parasitics (L/C/R) change waveforms in uSimmics, including ground bounce and crosstalk. Understand what decoupling caps, ferrite beads, and solid ground planes really do.

Noise Design & EMC

uSimmics(ex QucsStudio): Overview and How to Use This Free Circuit Simulator

QucsStudio has been renamed to uSimmics (formerly QucsStudio). Learn why the name changed, what’s different, how it compares with Qucs, and how to use key features like S-parameters, harmonic balance, tuning, and Monte Carlo analysis.

How to Install uSimmics (formerly QucsStudio)

Step-by-step Windows guide to install uSimmics (formerly QucsStudio). Download the ZIP, extract it, start with start.bat, and find uSimmics.exe in /bin.

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