Let’s Talk Technical with Qorvo- QSPICE - Advancing RF Circuit Simulation | DigiKey скачать в хорошем качестве

Let’s Talk Technical with Qorvo- QSPICE - Advancing RF Circuit Simulation | DigiKey

Learn how Qorvo’s QSPICE revolutionizes RF design by improving time-domain accuracy, handling non-linearities, and streamlining user experience. Discover why RF and mixed-signal engineers should consider QSPICE over traditional SPICE tools. Mike Engelhardt, known for his work on LTspice, discusses the development of Qorvo’s QSPICE and how it transforms simulation for RF engineers and mixed-signal designers. Traditional SPICE tools were not always ideal for RF design, but QSPICE addresses many of these limitations. Why RF Designers Should Care • Historically, RF engineers preferred frequency-domain or harmonic balance simulators, since SPICE struggled with spurious harmonic generation. • QSPICE introduces a time-step process that quantifies low-level non-linearities accurately, making time-domain simulation a powerful tool for RF design. • Benefits include: o Simulating the real bias point and full non-linearities. o Reduced risk of errors compared to frequency-only analysis. o Better visibility into circuit behavior without oversimplifying assumptions. Time-Step Innovation • Simulation accuracy depends on time steps. • QSPICE automatically determines the minimum necessary steps to achieve user-defined accuracy. • Unlike older tools, it leverages GPU-based graphics technology to handle and plot massive datasets at high speed, allowing FFT analysis that accurately shows spurious responses and noise floors. Advantages for RF Design • Enhanced ability to separate and analyze PCB parasitics individually. • At lower frequencies (less than 50 MHz), PCB parasitics are minor, but above ~100 MHz they become critical. QSPICE allows engineers to model and test these effects directly. • Handles dispersion challenges, where inductance, capacitance, or magnetic behavior vary by frequency. Improved User Experience • Unlike legacy EDA tools with outdated GUIs, QSPICE focuses on workflow efficiency: o In-place text editing instead of disruptive pop-up dialogs. o Right-click menus for immediate access to relevant commands. o Fewer eye and hand movements during schematic editing. Mixed-Signal Simulation • QSPICE supports native C++ and Verilog compilation, executing code during simulation. • Offers exceptional mixed-mode performance, running digital logic at near hardware speeds. • Simple to use—engineers can drag-and-drop a code block into a schematic and run it without external compilers. Conclusion QSPICE enables RF and mixed-signal engineers to go beyond the limitations of traditional SPICE by: • Providing robust time-domain accuracy. • Offering powerful non-linear and parasitic modeling. • Streamlining usability with a modern, intuitive interface. For RF engineers tackling GHz-level challenges and mixed-signal designers needing integrated logic simulation, QSPICE represents a major step forward in circuit simulation technology. https://www.digikey.com/en/supplier-c... https://www.qorvo.com/design-hub/desi... https://www.digikey.com/en/applicatio... https://forum.digikey.com 00:00 Introduction 01:12 Why RF simulation are important 03:22 Brief explanation of Time Step 07:04 Why is QSPICE useful 09:06 Decupling of parasitic influence 10:16 High Frequency Simulation Problems 12:45 QSPICE User experience 15:35 QSPICE Mixed Mode Simulations 16:35 Outro