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.
We found this circuit in a publication from the 70s, with some configurations that we think are...
Other versions exist on this site from various publications. This one is from the Radio...
The LMV321 is a low voltage operational amplifier from ON Semiconductor. The following diagram,...