Design symbols

The analog elements in the circuit are designed by the symbol editor (Fig. 1) it presented SPICE model.

Fig. 1 symbol editor

The steps of design symbol

The creating of symbols in the editor is based on the following steps:

• Step 1 Execute: SymbolEditor from DSPICE

• Step 2 Draw the electrical elements by lines, rectangles, ellipse ….etc.

• Step 3 Add ports or pins.

• Step 4 Add parameters.

• Step 5 Add reference.

• Step 6 Choose the type of model.

• Step 7 Save the new symbol in one of the folders in the library.

• Step 8 Write SPICE model.

• Step 9 Or attach symbol with SPICE model by placed or saved in the same directory with the same name of model (with extension *.model).