Hi, Im trying to evaluate using a crystal as the tuned element of the phase shifter in a conventional quadrature FM demodulator (for extremly low modulation and narrow band PM detection)
I have entered practical values for all the elemnts of the crystal (q=20000) however i find the settling time is rather long, although i set the start time to 1 second the voltage at the crystal is still rising seemingly linearly, and hence making the fine 100khz peak expected rather spread out and obscuring the sidebands, im wondering if its feasable to model this with any acuracy ? i could increase the time and maybe reduce tstep further but already it takes a long time to run.
Colin =^.^=