uSimmics

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 vs. uSimmics (formerly QucsStudio): a comparison of simulation engines, features and use cases. RF and high-frequency work: uSimmics. Analog and power design: LTspice. 2026 guide.

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