This circuit is from a 60's documentation. The capacitance C1 can be between 20 pF and 0.01 uF depending on the generated frequency. Equivalent transistors may be employed.
This circuit came out in a Popular Electronics from December 1995. It is a double T configuration that...
Found in a 1967 Electronic Design, this circuit can detect pulses as narrow as 0.2 us. Active...
This is the basic configuration of a Colpitts LC oscillator using a CMOS gate. ...