SynaptiCAD Tutorials

(TD) 4.8 Generating Ramp Waveforms

(TD) 4.8 Generating Ramp Waveforms

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(TD) 4.8 Generating Ramp Waveforms

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The best way to create a ramp signal is to either use a Ramp label equation or a Ramp waveform block equation. These functions can create a ramp signal with plenty of data points, so that it will export accurately to both analog and discrete-event digital simulators. The functions have three required parameters: startVoltage, endVoltage, and duration. For Label equations, there is also an optional fourth parameter that can specify the number of points to use when drawing the waveform.

Draw a ramp with a State Label Equations

Add a new signal to the diagram and double click on the signal name to open the Signals Properties dialog. Name the signal Ramp_waveform and set the Size ratio to 2.

Clear out any text that might be in the label equation box, then use the equation flyout button to insert a Ramp function.


Edit the parameters as shown to make a ramp that starts at 0 volts and ramps up to 5 volts, over a period of 150 ns. Also add the fourth parameter to specify that the  ramp should be generated using 40 points.


Press the Label Eqn button to generate the waveform.


Edit the parameters to make a down ramp, then press the Label Eqn button to generate the waveform.