TopSpice

One animated circuit is worth a thousand equations and diagrams. Animations of voltages, currents, and charges are displayed right on top of the schematic, providing great insight into circuit operation. The real-time circuit simulation engine is custom-built for speed and interactivity. Easy one-click simulation, from simple resistors and logic gates to complex transistor-level oscillators and mixed-signal designs. While the simulation is running, you can flip switches, adjust potentiometers, tune LED current limiting resistors, ramp up input voltages, etc. The circuit will immediately respond to your changes, in real time. Mini-waveforms on top of schematic wires look different for digital and analog signals. Constant analog voltages are shown as numbers, digital wires are color-coded. Any pair of time-domain signals may be plotted in the XY mode. The oscilloscope scale and grid ticks are auto-updated to convenient values as the data changes.

It combines accuracy and speed in a full-featured design environment, enabling 10-50x faster simulation than SPICE for power supply designs. All features of SIMetrix Classic and uses the same GUI environment including its hierarchical schematic editor and waveform viewer. Rapidly locates the steady state operating point of a switching system without having to simulate the startup transient conditions. SPICE transistor and diode model conversion to SIMPLIS format. Converts SPICE models by running a SPICE simulation to perform parameter extraction. The advanced digital simulation library provides a wide variety of digital functions such as counters, ADCs, DACs and much more.