This traditional crystal oscillator configuration can use any CMOS gate configured as an inverter. R1 has values from 1 to 5 M ohm and R values around 10 k.
This circuit appears elsewhere on the site. The circuit shown is from an American 1980s...
This circuit can produce signals up to 100 kHz depending on C1 and R1 adjustment. The output has a...
This circuit is from an old publication from 1977 and can be implemented with more modern...