Clock frequency using Qucs Rectangular Source versus Spice Pulse Source
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tomhajjar commented
I made two clock sources. One using Qucs Rectangular Source and the other using Spice Pulse Source. I can't figure out why the one made with Qucs Rectangular Source generates the wrong frequency.
Since both use the Spice Pulse function why is the one I made using "Qucs" wrong? Is the mapping of Qucs parameters to Spice wrong or are my formulas wrong?
ra3xdh commented
Everything is correct. The period for Qucs source is calculated as PER=TH+TL+TR+TF. If gives 2*0.5/1e7+1e-9+1e-9=1.02e-7 The calculation in the CIR file is different. Please fix your equations in the subcircuit to take into account TR and TF.
tomhajjar commented
Actually they were both wrong. I had to fix both subcircuits and clock.cir as well...
