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Applied Computational Sciences

Computer Aided Engineering Solutions for RF & microwave circuit design


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LINC2 Pro produces simulation results directly from the schematic page.  After drawing the schematic or opening an existing schematic, just click "Analyze" and then click "View" to see the results.

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Shown in this figure is a LINC2 analysis of a crystal oscillator circuit.  The graph shows the gain margin (magnitude of S21 in dB) at the zero phase crossover point  (P21 in degrees).  After selecting the crystal's series resistance from the "Tune" menu and adjusting it to 30 Ohms (originally 90), the dotted curve indicates that an additional 3 dB of gain margin is achieved.  In the physical circuit, connecting port 1 to port 2 closes the loop and starts oscillation at the design frequency (zero phase crossover point).

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Last modified:  October 23, 2017