LR oscillators (no capacitor)

Using a schmitt trigger inverter with a resistor feeding back to the input and a capacitor from the input to 0V makes a conventional RC oscillator.

I suspect, with a little more care you can use an inductor feeding back to the input with a resistor to 0V too.

You might need diode clamps on the output to both supply rails to prevent back-emfs damaging the schmitt trigger.