![]() ![]() Instead of simulating your circuitry with ideal signals, you are now performing a simulation with real-world signals that include impairments from the environment. Click the PLAY button to run an interactive simulation in Multisim and to use this data in simulation.Connect the device on the schematic to the active filter circuit as shown in Figure 5.įigure 5. Multisim Circuit With a VirtualBench Source In this example, we are using the attached schematic. Now the signal is ready to be used inside Multisim for further design optimization. You also have the option to repeat the data to run simulation times longer than the acquired stream.įigure 4. Exported ECG Signal from VirtualBench Loaded in Multism It will now load the signal and provide a preview. In the File Name field, navigate to the exported .csv measurement file saved in step 4. See Figure 3.įigure 3. VirtualBench Device on a Multisim Schematicĭouble-click on the device. If Multisim was already started before you completed step 5, then you need to restart Multisim.įigure 2. Location Where the VirtualBench Instrument is Loaded in Multisimĭrag and drop the VirtualBench device into your design to use the device as a signal source. Open Multisim the LabVIEW Instruments menu and toolbar are displayed at the top of the window as seen in Figure 2. With this custom library created in LabVIEW, VirtualBench measurements can be seamlessly integrated in a design simulation of a signal conditioning amplifier. Multisim is the only circuit simulation tool that offers the capability of creating custom sources, simulation analyses, and instruments.This library needs to be installed to \National Instruments\Circuit Design Suite\LVInstruments to function properly. The library allows you to import VirtualBench measurements into Multisim. To load your waveform in Multisim, you need to download the attached library called VB_Multisim_Library.llb .csv file to a specific directory on your computer. In the VirtualBench application, go to File » Export Data… or simply press Ctrl-X to save the raw measurement data to a.Multisim requires that waveforms use this mode.įigure 1. Change Acquisition Mode to “Sample” Before Exporting Measurements from VirtualBench In the Mixed-Signal Oscilloscope settings menu, select Acquisition » Sample as seen in Figure 1. As can be seen in Figure 1 below, this example is acquiring a heartbeat signal from an ECG sensor device. This section goes over the process of exporting measurements from VirtualBench and importing them into Multisim: In this example, a heartbeat signal is acquired using VirtualBench and is imported into a simulated circuit of a signal conditioning amplifier to be evaluated using Multisim. ![]()
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