LC Oscillator

Kick it to get it going.

Yes, cuz its an RC and not LC oscillator with f=0.75/(R*C) you need L just as a work around to not get into CFS (cant find solution) problem of EC. Tune L down to 100nH and play with the RC values. Hope this helps.

And if you want to run it as pure LC you need to drive the notch, which your LC is, against some lower impedance (notch at resonance is Xl=Xc=0ohm beside the rest of DC R). The inverter input has an infinite input impedance and the 100kOhm negative feedback resistor is also much to high. So the notch has no counterpart to work against. Lower the 100k to around 50Ohm and tune down the simspeed to 500us/s and you get your LC oscillator at around 1kHz. Only question for me is why its working for you in real? This is what i like to bring together, simulation with real world behaviour. Are you using std 7400, i guess its not MOS cuz they have to high input impedance. Hope this clarifies a little.

Thank you very much hurz.

You are welcome!

Hurz, thanks again, I made the changes and the frequency is right at about kHz, I am new using EC, so another question is why the scope show oscillation and a waveform at one time setting and not at another time setting with the same components. Is it a limitation of EC?....................I always like oscillator circuits although I am not very good at designing them, I think oscillators are the hart beat of every electronics device or computer, without oscillators nothing would work.................So when you make an oscillator is like creating a beating hart and gives the sense of "IT"S ALIVE" does it not?.

100nH + 75Ohm and 10uF is still a RC oscillator combination. Go back to org values 5uF + 4.7mH and only keep the resistor at 75Ohm then you have your desired LC osci. Im not sure if i get your "scope" question... Could try to give an example. Probably in a new circuit. Cheers

Ok, I posted then new oscillator circuit as suggested and perhaps I explained my difficulty clearly this time...... Thank you.