LTSpice

S.P.I.C.E. stands for Simulation Program with Integrated Circuit Emphasis. It is a very complex program that automatically calculates the voltages and currents in the individual branches of an electrical network and also tests a circuit in the laboratory. The software was developed at Berkeley University and has been available to the public since 1975. Circuit simulation programs are a very useful tool for anyone involved in the design of electronic circuits. Their use is essential in the case of integrated circuit design. In fact, to validate the compliance with the design specifications of an electronic circuit it would be necessary to build a prototype and carry out measurements on it, instead the use of this simulator makes the design of circuits and their integration faster and cheaper.

LTSpice is a SPICE graphic simulator of analog and digital electrical circuits for free use. Those who have used SPICE know how much effort and concentration it takes to write the descriptive text of the circuit to be analyzed. LTSpice allows you to draw the circuit to be analyzed and allows you to quickly change components and parameters of electronic circuits, then test the performance with new parameters and find the optimal solutions.

LTspice contains the complete library of Linear Technology Corporation components but you can add third party libraries to your existing database as well as create your own templates. The editor has a hierarchical structure, the design of electronic circuits of medium and great complexity is performed by creating sub-circuits. The depth of the hierarchy and the size of the schema are limited only by computer resources.

With LTSpice you can do:

  • amplitude-frequency analysis, in this case it is necessary to set the number of data points between the lines, the type of scale, the lower and upper frequencies;
  • analysis of transient processes;
  • harmonic analysis, including calculation of levels and total harmonic distortion as a percentage;
  • spectral analysis of the noise characteristics at a selected point of the circuit, as well as the noise characteristics provided at the input.

Furthermore, in LTspice, it is possible to construct amplitude-frequency characteristic diagrams with gradual variation of the nominal value of the selected element. The results of all simulations are displayed in a graphic window, with the possibility of further analysis.

You can download LTSpice at the following address  https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html

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