And much credit should be given to Sebosfato for the pll circuit he brought to this forum. I use it and am thankful that he shared it here. Using the lm393/555 pwm to gate Sebs pll 4046 pulser makes this waveform simple to produce. You are looking for positive only waveforms way up past resonance and using only them by chopping off the trailing ocilations with another new pulse, the typically damping off wave is interrupted after first first large positive swing and then just before it gets a chance to swing into negative territory with the rest of the oscillation, you hit it with another positive pulse.
Kb
