This circuit oscillates in the fifth harmonic of the crystal frequency. The circuit is from a 90's documentation. L1 must be according to the desired frequency.
Sawtooth-type waveforms are typically generated by relaxation oscillators with unijunction...
This circuit was obtained in an Argentine publication in 1976. It consists of a series voltage...
Using a 4046 PLL, which is uncommon today, this circuit was found in the October 1994 issue of...