#Ltspice for mac full#
WAVE function has a fixed full scale range.PARAM statements in the “User Parameters” list are modified to establish the full scale range of each channel independently. Second, the E sources provide scaling for the inputs since the. The User Circuit node is attached to the recorder input without worrying about node names. First, they isolate the node name in the User Circuit from the node names in the. The Voltage Controlled Voltage Sources (E100, etc.) serve two functions. Note, the figures can be seen with much greater detail if opened in a separate tab. This example has four channels, but it could have from 1 to 65535 channels. The schematic shows a User Circuit connected to the recorder. Here is a general-purpose recorder that can be added to circuits. A list of the nodes in the schematic to record. 10K - The number of samples per simulated second.
Think analog-to-digital converter resolution. We are going in a totally different direction. That example is appropriate for creating a WAV file that can be played back as audio. I have deliberately not used the example from LTSpiceHelp. wave Circuit_Data.wav 16 10K V(ab) V(cd) V(ef) V(gh) Also, I could not verify the number of sampling bits beyond around 24 bits.Īll this is done by putting a. My tests found the maximum samples per second to be about ½ of the value in the table with a Transient simulation running for 10 nanosec. Wow! Imagine an actual data recorder with over 60,000 channels, 32-bit analog-to-digital conversion, and over one billion samples per second. This table summarizes the specifications from LTSpiceHelp To me, this is a good format for a general-purpose, multi-channel data recorder. Way beyond what music recording could require. However, the number of channels can be very large. Also, the data is organized into channels like you would expect in a music recording studio. Apparently, in the music industry, it is the ultimate for high-quality recording. You put a number in, you get the same number out. One key thing to know is WAV files are not compressed. I did not understand what this meant until looking at the detailed LTSpice specification and seeing how these specs aligned with low-level details of the WAV file format. In this article, examples of general purpose recording and playback circuits and details of the data format are explored.Īn intriguing capability of LTSpice is recording Transient simulation data as WAV files. The data can be read back by voltage and current sources and used as inputs to other LTSpice circuits, viewed using a simple playback circuit or exchanged with common data analysis applications. LTSpice has the capability to record data from voltage and current nodes as part of a transient simulation.
#Ltspice for mac how to#
As an example, Mesh current and Node voltage methods were used in a simple circuit.Learn how to interface with LTSpice using WAV files. op spice statement and how it can calculate dc voltages and currents in a give circuit topology. To sum up, the point of this post was to illustrate.
Reading the node voltage in LTspice is exactly the same as node voltage calculation by hand given reference node is the same in both cases. Here is the simple node voltage analysis of the same circuit. Here is LTspice example for the above hand analysis.
This is because LTspice takes the current direction into the voltage source. For example, current going through 10V source is same as mesh current I1 except polarity is reversed. op analysis, one has to make sure to get the branch current that is isolated and matches with its mesh current counterpart. It perform a dc operating point analysis and calculate all the node voltages and branch currents in a given circuit.įollowing simple circuit is used to illustrate the mesh current analysis by hand: Mesh current and Node voltage examples here are purely for academic purpose. Although LTspice calculate voltages and currents by using sophisticated network theory, but nonetheless, it can be useful to match the node voltages and mesh currents with hand calculation as required to do so in a first year elementary circuit courses. Node voltage and Mesh current are methods that systematically calculate voltages and currents in a circuit.
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