Engineering Insights: Exploring QSPICE, a New Frontier in Circuit Simulation

In this episode of Elektor Engineering Insights, we dive into the world of circuit simulation and explore the capabilities of QSPICE, a new SPICE (Simulation Program with Integrated Circuit Emphasis) tool developed by Qorvo, along with experts Mike Engelhardt and Pete Losee from Qorvo.

The SPICE Evolution

SPICE (Simulation Program with Integrated Circuit Emphasis) has long been a fundamental tool for engineers, used for simulating analog circuits. However, with the growing availability of simulation tools, many of which are open-source or free to use, questions have arisen, such as their capacity to support the latest wide bandgap devices. Wide bandgap devices have unique characteristics, but they also introduce challenges in terms of circuit simulation. One notable limitation is that existing SPICE programs may not have device equations required to model SiC and GaN devices correctly. Mike Engelhardt shed light on his role at Qorvo, where he's been involved in launching QSPICE. He explained his dream of making a freely available SPICE tool, what he's learned about circuit simulation, and how QSPICE benefits engineers developing SiC-based applications. Next, Mike took us through QSPICE with some demo projects.

SiC Devices and Q&A

The conversation shifted to SiC (Silicon Carbide) devices in the next part of the show. Pete Losee explained how they are gaining prominence in power applications due to their superior characteristics. SiC stands out from silicon due to its wider bandgap and higher critical electric field. Consequently, SiC offers higher voltage capabilities with low resistance and smaller die sizes, enhancing conduction and switching performance compared to standard silicon devices. In contrast, silicon faces challenges beyond a couple of hundred volts, requiring complex technologies like super junctions or introducing insulated gate bipolar transistors (IGBTs) at higher voltage levels.


During the Q&A session, Stuart's guests raised various questions related to QSPICE and SiC devices. To start using QSPICE, beginners can access a range of learning resources and videos available on the Qorvo website. They discussed the potential for Python support in QSPICE, explaining that it can be called from Python through the command line. The audience was also interested in the possibility of plotting multiple signals in separate plots in QSPICE, to which Mike answered positively. The current SiC device market was explored, focusing on applications like EV traction inverters, on-board and off-board charging, PV systems, and more.

To catch up on the entire episode, jump over to Elektor TV - Industry or watch below: