TINA_Advanced_Topics.pdf

This expression can then be copied to the clipboard

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This expression can then be copied to the clipboard (by pressing the copy button on the toolbar) and pasted to the schematic editor or to any of the diagram pages.
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You can also generate a symbolic result with only a few symbolic variables, while the numerical values of the rest of the variables have been substituted. Symbolic analysis takes the symbols of the variable from the circuit element’s labels in the schematic editor. When the label is empty or has been determined to not be a valid symbol name, symbolic analysis uses the part’s numerical value . For example, if you change the label of the resistor R1 to “22k” or to “R1=22k”, then the value of the part (22k) will be used in place of the symbol R1. TINA goes beyond simply presenting the function as an equation. Any of these functions can also be interpreted and drawn in the diagram window. To demonstrate this, let’s first generate the transient response of an RLC series resonant circuit. Load the examples\symbolic\myrlc1.sch circuit into the schematic editor.
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Next, run Analysis.Symbolic Analysis.Semi-symbolic Transient. The transient response of this circuit to a voltage generator with Unit step waveform is then the following: Now press the small calculator (interpreter) button on the toolbar. The interpreter window appears, and our transient function is already defined as a v_1 function. As you can see, the function definition is followed by a few drawing preference settings, where you can define the ranges of the function and the number of points at which the function will be calculated. Finally, the last command draws this function in the diagram window. The second parameter of the draw command defines the name of our newly generated function. After pressing the Run button, the function appears in the diagram window.
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Symbolic analysis can also calculate the DC and AC results (response) of a linear network containing one or more sources. Just as with symbolic analysis of AC transfer functions, these results can be generated both in symbolic and semi-symbolic form. If we choose the symbolic form, all variables in the circuit that have symbolic identifiers (labels) will be treated as pure symbols. If we choose the semi-symbolic form, every parameter of the circuit will be handled as a number. When the circuit contains more than one generator (source), the result due to each of these generators will be calculated and added together (using the superposition law). Let’s use a simple parallel resistor circuit to get to know symbolic analysis of circuit results. Open the circuit examples\symbolic\suppos.sch.
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This circuit contains two generators: a voltage and a current generator. Now press Analysis.Symbolic Analysis.DC Result. As you can see the result is a fully symbolic combination of the circuit’s response to each of the generators.
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