Re: Crystal oscillator circuit design
Ah - and I multiplied that by all the usual numbers and it came out nowhere useful that I could see!
Just for fun I put a Pye Westminster Colpitts Oscillator - as best I could remember it - into LTspice. I have not played with oscillators there before.
At the moment I am lacking a good model for a quartz crystal but with an Inductor and a Capacitor at least I have something that produces output - after messing about with the feedback capacitors. With my memorised values oscillations would start but die away. With a tweak of values it sustains and it runs.
You might try to do the same since oscillators are something of a dark art. I'm not sure they are very amenable to analysis by written equations in a simple way. LT Spice is free but there is an associated learning curve.
David explains oscillators far better than I - read his writings!
What do you want to use as active device? Transistor or logic gate?
The main benefit of LT Spice is the virtual probe which can tell you Voltage across the crystal and then with ESR value you know the dissipation.
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