Sunday, 28 February 2016

LT Spice Simulations

Playing around with LT Spice the last few days. I ran some simulations for the Rx circuit of the LBS Bilateral Amplifier.

I was mostly interested in the impedance of the input transistor, 2N3904. The red trace is the result of the base current * the base voltage.  The result is around the 21k ohms. Quite a bit higher than a measured value obtained by another ham with his circuit.  I've yet to measure my circuit for a comparison.  I also need to confirm the simulations with my actual circuit.   Hopefully they are close so I can have some confidence with the spice simulations.

I also got a lot of help with the transformer model from the LT Spice Yahoo Group. A lot to learn. Good thing I'm retired.




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